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Source: http://blog.reprap.org/rss.xml

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quality</category><category>surfcad</category><category>switch</category><category>te papa</category><category>techzone</category><category>telescope</category><category>test</category><category>thermistor</category><category>thermocouple</category><category>thermoset</category><category>time lapse</category><category>timing belt</category><category>tin can steppers</category><category>tip</category><category>token ring</category><category>toothed pulley</category><category>travel</category><category>tsa</category><category>turtle</category><category>universal</category><category>usb</category><category>valve</category><category>vascular tissue fabrication</category><category>version 2</category><category>video</category><category>viewfinder</category><category>visits</category><category>warp</category><category>washer</category><category>water</category><category>wax</category><category>wine</category><category>wire glue</category><category>workshops</category><category>wreck</category><category>x axis</category><category>zone</category><title>RepRap: Blog</title><description>Blog for the RepRap project at <a href="http://www.reprap.org">www.reprap.org</a> - a project to create an open-source self-copying 3D printer. To get all the early posts on this blog with all the images as a single PDF <a href="http://reprap.org/wiki/File:A_History_of_RepRap_Development.pdf">visit this page</a>.</description><link>http://blog.reprap.org/</link><managingEditor>noreply@blogger.com (Adrian Bowyer)</managingEditor><generator>Blogger</generator><openSearch:totalResults>1112</openSearch:totalResults><openSearch:startIndex>1</openSearch:startIndex><openSearch:itemsPerPage>25</openSearch:itemsPerPage><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-5746603334481954902</guid><pubDate>Wed, 08 May 2024 23:49:00 +0000</pubDate><atom:updated>2024-05-09T00:49:33.767+01:00</atom:updated><title>Probe Storage</title><description>I've bent a few probes now. They're delicate little snowflakes. So I've created a storage spigot and added it to the <a href="https://www.printables.com/model/867526-flexure-probe-holder-for-openflexure-microscope-il" target="_blank">probe arm files</a>. This spigot can be glued inside a pill container lid to allow the probe to be protected by the container without rattling around:<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgAu1op12BbVzr8LGow2mzslqvvuk3K3_u3yTcAW8_wyK6ayz2l4mxAvsQ3_isu8s-p7DvCVbz77eSs7g6KVUjUDnnAb7hNxDyCzgP9VKTBkm1PG978BMHopfmj1_jVIourgo1cMdK2wEVRItYFiQ4LyUN8TiCXoYTw7BsXnhmyB5leNUAP16mXfqWYPQTHMw/s4608/IMG_20240509_114223_640.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4608" data-original-width="3456" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgAu1op12BbVzr8LGow2mzslqvvuk3K3_u3yTcAW8_wyK6ayz2l4mxAvsQ3_isu8s-p7DvCVbz77eSs7g6KVUjUDnnAb7hNxDyCzgP9VKTBkm1PG978BMHopfmj1_jVIourgo1cMdK2wEVRItYFiQ4LyUN8TiCXoYTw7BsXnhmyB5leNUAP16mXfqWYPQTHMw/s320/IMG_20240509_114223_640.jpg" width="240" /></a></div> </description><link>http://blog.reprap.org/2024/05/probe-storage.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgAu1op12BbVzr8LGow2mzslqvvuk3K3_u3yTcAW8_wyK6ayz2l4mxAvsQ3_isu8s-p7DvCVbz77eSs7g6KVUjUDnnAb7hNxDyCzgP9VKTBkm1PG978BMHopfmj1_jVIourgo1cMdK2wEVRItYFiQ4LyUN8TiCXoYTw7BsXnhmyB5leNUAP16mXfqWYPQTHMw/s72-c/IMG_20240509_114223_640.jpg" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-3765240675892901128</guid><pubDate>Wed, 08 May 2024 09:26:00 +0000</pubDate><atom:updated>2024-05-08T10:26:29.913+01:00</atom:updated><title>Degugging: 10x10 grid of 20nm squares</title><description>Scrappy innit? I could tell from the microscope that the probe was tracing out a square, however point contact is a bit patchy - don't expect to see individual 20μm squares as this is a rigid chonky tip.<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQEpylvHL_SINIM9NVRpP8j1pBxEpyjkAyINRMJB0hdwVTLMCx820zjxd-Gpgjb1u6nrtg_Fytb-Stm5oTpgzDfVumNPESeESwiBC3tLY12qyqU8vrYjeX_eR5jnxc4N09VWd2rhsog7QjEeCq27o5kkr2Z5WMZfwYVG7qdeD-PCSwEIIQA-kXKz5EmS6LmA/s640/10x10_grid_20nm_squares-2024-05-08-21h14m29s597.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="480" data-original-width="640" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQEpylvHL_SINIM9NVRpP8j1pBxEpyjkAyINRMJB0hdwVTLMCx820zjxd-Gpgjb1u6nrtg_Fytb-Stm5oTpgzDfVumNPESeESwiBC3tLY12qyqU8vrYjeX_eR5jnxc4N09VWd2rhsog7QjEeCq27o5kkr2Z5WMZfwYVG7qdeD-PCSwEIIQA-kXKz5EmS6LmA/s320/10x10_grid_20nm_squares-2024-05-08-21h14m29s597.png" width="320" /></a></div> &nbsp;As this was scanned in both X and Y, we can pretty clearly see that the probe is too high in the top right corner of the image. Rough sums as follows:Height of stage: 75mmTravel from centre to endstop: 2mmTherefore Pythagoras tells us 0.025mm height variation on the flexure stage.We're moving 0.2mm here, so we'd expect a height variation of roughly 2.5μm, which feels about right. A few more test patterns required, and a way of actually making sure I'm properly centred to get some consistency. Perhaps a pattern of groups of concentric squares varying in height? </description><link>http://blog.reprap.org/2024/05/degugging-10x10-grid-of-20nm-squares.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQEpylvHL_SINIM9NVRpP8j1pBxEpyjkAyINRMJB0hdwVTLMCx820zjxd-Gpgjb1u6nrtg_Fytb-Stm5oTpgzDfVumNPESeESwiBC3tLY12qyqU8vrYjeX_eR5jnxc4N09VWd2rhsog7QjEeCq27o5kkr2Z5WMZfwYVG7qdeD-PCSwEIIQA-kXKz5EmS6LmA/s72-c/10x10_grid_20nm_squares-2024-05-08-21h14m29s597.png" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-2341205850402371318</guid><pubDate>Wed, 08 May 2024 00:01:00 +0000</pubDate><atom:updated>2024-05-08T01:01:25.636+01:00</atom:updated><title>Probe Tip Movement And Z Height Variation</title><description>So I've tested out the new probe holder fitted with with a fairly broad etched tip. Back to a glass slide, which I have to mount sideways to fit on the stage (more on order).Over 400μm of logo I'm noticing a roughly 7μm variation in probe height. This might be due to my stage not being perfectly level, or the stage dropping slightly as the X and Y axis move. That should be a very small effect but I'll have to run the sums because 7μm is indeed very small.If I make smaller things though, the Z height variation will be less in proportion. Still, here's what the test looked like. I'll run up a proper test grid and run some off with the axes positioned at different maxima and minima. See what's actually going on. <div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJ0c0-aKeBURfcu1db_c6zjI1ojd4D4Vno4HeoaTJj5SbCTsxquqfv7OLCaXwVT0sZ3xPlz6NCxbka1tzJ16shJ8OYd3CtIjI7thO84_XwvbIvEHs7kWmAcj_Ox03boKppJa3sPtAq6JRwtgrGmLAC_axO-y_e1rb8PRaQyqnJ5HKwqXoKRpkdSCUHWFIapw/s640/uRepRap_glass_slide-2024-05-08-11h37m08s607.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="480" data-original-width="640" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJ0c0-aKeBURfcu1db_c6zjI1ojd4D4Vno4HeoaTJj5SbCTsxquqfv7OLCaXwVT0sZ3xPlz6NCxbka1tzJ16shJ8OYd3CtIjI7thO84_XwvbIvEHs7kWmAcj_Ox03boKppJa3sPtAq6JRwtgrGmLAC_axO-y_e1rb8PRaQyqnJ5HKwqXoKRpkdSCUHWFIapw/s320/uRepRap_glass_slide-2024-05-08-11h37m08s607.png" width="320" /></a></div> &nbsp;Speaking of which, I'm starting to get annoyed about not being able to "home" the axes, so that might happen in the near-ish future. Personal life getting in the way of that. </description><link>http://blog.reprap.org/2024/05/probe-tip-movement-and-z-height.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJ0c0-aKeBURfcu1db_c6zjI1ojd4D4Vno4HeoaTJj5SbCTsxquqfv7OLCaXwVT0sZ3xPlz6NCxbka1tzJ16shJ8OYd3CtIjI7thO84_XwvbIvEHs7kWmAcj_Ox03boKppJa3sPtAq6JRwtgrGmLAC_axO-y_e1rb8PRaQyqnJ5HKwqXoKRpkdSCUHWFIapw/s72-c/uRepRap_glass_slide-2024-05-08-11h37m08s607.png" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-3116082936645749209</guid><pubDate>Tue, 07 May 2024 06:51:00 +0000</pubDate><atom:updated>2024-05-07T08:13:12.643+01:00</atom:updated><title>New Probe Tip Holder</title><description>I've added a probe socket to the <a href="https://www.printables.com/model/867526" target="_blank">probe arm files</a>.Partly because I wanted to stiffen up the wire probe tips I'm making, and partly because I realise that hypodermic needles are not universally available. These press-fit onto the end of the probe arm. <div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihNNuhwiGvhgE_sNvp0wDJWUEI9eNUjAKtTlKfQlziW5N1ixa2pg4RtNUB_uW2N5tAGqlWqtyppNtgVXLBJ2Kkl61JyzVaEX__xUh3UVXovzOldjoQhnxI2N6gtZnTtJIFdJQegi3Bs6mzybBT8eFBBHZpNN5taglJ_R-87eMRdhyRvRO4fGSCKjWHcvCEOA/s1024/printed_probe_tips_20240507_184114_632.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="768" data-original-width="1024" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihNNuhwiGvhgE_sNvp0wDJWUEI9eNUjAKtTlKfQlziW5N1ixa2pg4RtNUB_uW2N5tAGqlWqtyppNtgVXLBJ2Kkl61JyzVaEX__xUh3UVXovzOldjoQhnxI2N6gtZnTtJIFdJQegi3Bs6mzybBT8eFBBHZpNN5taglJ_R-87eMRdhyRvRO4fGSCKjWHcvCEOA/s320/printed_probe_tips_20240507_184114_632.jpg" width="320" /></a></div> The probe wire can either be just wedged in the slot (which conveniently tapers inside), glued into place, or melted into a spludge of plastic with a soldering iron. </description><link>http://blog.reprap.org/2024/05/new-probe-tip-holder.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihNNuhwiGvhgE_sNvp0wDJWUEI9eNUjAKtTlKfQlziW5N1ixa2pg4RtNUB_uW2N5tAGqlWqtyppNtgVXLBJ2Kkl61JyzVaEX__xUh3UVXovzOldjoQhnxI2N6gtZnTtJIFdJQegi3Bs6mzybBT8eFBBHZpNN5taglJ_R-87eMRdhyRvRO4fGSCKjWHcvCEOA/s72-c/printed_probe_tips_20240507_184114_632.jpg" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-3740584222920467764</guid><pubDate>Mon, 06 May 2024 08:58:00 +0000</pubDate><atom:updated>2024-05-06T09:58:13.419+01:00</atom:updated><title>So How Smooth Is Glass?</title><description>I may be blaming my tools here, but I'm running into a persistent problem with my clever idea of using glass cover slips: They seem to be uneven. Or the cheap batch I have are anyway. This might not normally matter, but when you're controlling the probe height to a micron or two it can be a pain in the butt!I'll have to switch back to slides. Which means I'll have to cut some down because a whole slide won't fit on the new stage. Or make a new stage, I suppose. I'll have to fork out for more slides eventually as I have like one spare and all the others have really interesting specimens on... </description><link>http://blog.reprap.org/2024/05/so-how-smooth-is-glass.html</link><author>noreply@blogger.com (vik-olliver)</author><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-3117548340229314888</guid><pubDate>Sun, 05 May 2024 07:43:00 +0000</pubDate><atom:updated>2024-05-05T08:43:36.836+01:00</atom:updated><title>High Magnification Effects Of Probe Height</title><description>On this one I ran the 400μm logo etch 10 times, lowering the probe height by 1 micron each time. The photo shows the top of the arms of the 'u' under a higher magnification than I usually use. You can clearly see the separated ridges extending in a Northwest direction as the probe is flexed progressively out of position and in the direction of its inclination.<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmLR3hFGiUgu4WnCOktL0XF-CxO3FCEvkcTCs0sWlpUVJVfO2BZRC-Blb9YainivI1NJoEq-ITaxxvLnzr-tRsQDZK8HhvPd444YEWCYNFFl49KB9h5-NmJJ0qnrVvVsH2-jiykrpxpH2xJzMNM3u-9UPgcgRfxrQuSrpzmWMSXHP5_XdzgOboKQ4BOAwdag/s640/mag_u_-2024-05-05-19h37m24s326.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="480" data-original-width="640" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmLR3hFGiUgu4WnCOktL0XF-CxO3FCEvkcTCs0sWlpUVJVfO2BZRC-Blb9YainivI1NJoEq-ITaxxvLnzr-tRsQDZK8HhvPd444YEWCYNFFl49KB9h5-NmJJ0qnrVvVsH2-jiykrpxpH2xJzMNM3u-9UPgcgRfxrQuSrpzmWMSXHP5_XdzgOboKQ4BOAwdag/s320/mag_u_-2024-05-05-19h37m24s326.png" width="320" /></a></div> How high a magnification? I dunno. Too high for me to have useful light levels for general work. The objective lens is bloody close to the slide and I'm not going to risk my expensive calibration slide on it anyway! </description><link>http://blog.reprap.org/2024/05/high-magnification-effects-of-probe.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmLR3hFGiUgu4WnCOktL0XF-CxO3FCEvkcTCs0sWlpUVJVfO2BZRC-Blb9YainivI1NJoEq-ITaxxvLnzr-tRsQDZK8HhvPd444YEWCYNFFl49KB9h5-NmJJ0qnrVvVsH2-jiykrpxpH2xJzMNM3u-9UPgcgRfxrQuSrpzmWMSXHP5_XdzgOboKQ4BOAwdag/s72-c/mag_u_-2024-05-05-19h37m24s326.png" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-8935341485200417412</guid><pubDate>Sat, 04 May 2024 05:37:00 +0000</pubDate><atom:updated>2024-05-05T02:21:53.295+01:00</atom:updated><title>Probe Arm Mk 2</title><description>The Mk 1 probe holder was a bit tricky to set up, so I've been writing my own flexure library and made a new adjustable probe arm with it <a href="https://www.printables.com/model/867526-flexure-probe-holder-for-openflexure-microscope-il"></a><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi9e8_noqTSpvXrI8iY9-oHKwifSNiBn1iGp52Ul2gIbT8-VdkgBFsZFgJE52ihmfA16jHJQfQIBzacBsnHImOty68ND010v9PyNlFwRd5MHC7wqk3vk6Kzqabt_-2fEkQGGNWkjSFQl97Wgtfmc0iNTjVCqLFc9JGq-RbgC6GsZ_bxdhX1F5Eecq7EVkfchw/s634/Probe_arm_mk2_2024-05-04_17-33-22.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="476" data-original-width="634" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi9e8_noqTSpvXrI8iY9-oHKwifSNiBn1iGp52Ul2gIbT8-VdkgBFsZFgJE52ihmfA16jHJQfQIBzacBsnHImOty68ND010v9PyNlFwRd5MHC7wqk3vk6Kzqabt_-2fEkQGGNWkjSFQl97Wgtfmc0iNTjVCqLFc9JGq-RbgC6GsZ_bxdhX1F5Eecq7EVkfchw/s320/Probe_arm_mk2_2024-05-04_17-33-22.png" width="320" /></a></div> The wingnut on the side unlatches the body so it can slide back and forth in the clamp. The wingnut on top compresses the mechanism when tightened, raising the probe in a controlled manner. Loosening it, lowers the probe as the mechanism is nice and springy. While fitting it I buggered the probe tip though, so guess what my task is for tomorrow? </description><link>http://blog.reprap.org/2024/05/the-mk-1-probe-holder-was-bit-tricky-to.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi9e8_noqTSpvXrI8iY9-oHKwifSNiBn1iGp52Ul2gIbT8-VdkgBFsZFgJE52ihmfA16jHJQfQIBzacBsnHImOty68ND010v9PyNlFwRd5MHC7wqk3vk6Kzqabt_-2fEkQGGNWkjSFQl97Wgtfmc0iNTjVCqLFc9JGq-RbgC6GsZ_bxdhX1F5Eecq7EVkfchw/s72-c/Probe_arm_mk2_2024-05-04_17-33-22.png" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-6949899128520136440</guid><pubDate>Tue, 30 Apr 2024 20:37:00 +0000</pubDate><atom:updated>2024-04-30T23:51:31.350+01:00</atom:updated><title>Pretty Good 400μm tall RepRapMicron Logo, 20μm Feature Size.</title><description>This one came out well. I've made a test square in gcode that gradually spirals down 2μm a side, and I reset the Z height every time I run it until I touch the surface, then back it out to correspond with the height of the first side of the square that touches. This needs to be done to a precision of 1μm, and because it's a fairly consistent and binary scratch/no scratch I'm pretty sure I'm getting 1μm accuracy on the Z height. The lines are wavey because the relatively blunt tip on the hypodermic is hitting surface imperfections and pushing around them, as you can see at the roughly 4 o'clock position on the outline:<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh0422svZ-5h2HwQSTGX1AV3obg5Jew8-ZaHJNTwIQQT1Sj3RpsbGyk7QHfeDfvf1b1SCoJWqcjD8VO-AI72AVmYcth0nagWLtU0d9gz2yz3b_GQHRjuMCebqffMLCiQi0TXj4QbTxY483eLuGNy_L5d83_0pL7K33mCcaplFAFBb0yR-PeG3sr0q1H0flJRw/s764/400um_logo_3rd_attempt.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="576" data-original-width="764" height="241" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh0422svZ-5h2HwQSTGX1AV3obg5Jew8-ZaHJNTwIQQT1Sj3RpsbGyk7QHfeDfvf1b1SCoJWqcjD8VO-AI72AVmYcth0nagWLtU0d9gz2yz3b_GQHRjuMCebqffMLCiQi0TXj4QbTxY483eLuGNy_L5d83_0pL7K33mCcaplFAFBb0yR-PeG3sr0q1H0flJRw/s320/400um_logo_3rd_attempt.jpg" width="320" /></a><img alt="" height="241" 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" width="216" /></div> This might get better with a finer tip as there is less material on the probe for potential collisions and a sharper cutting edge. I'll try that next. As you can see from the image, the smallest feature - the thin bottom curve on the μ - is a 20μm gap. This is approximately the pixel size of a good home MSLA printer. The line width is somewhat less than 10μm which is the best I've ever managed with a hypodermic needle tip. </description><link>http://blog.reprap.org/2024/04/pretty-good-400m-tall-reprapmicron-logo.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh0422svZ-5h2HwQSTGX1AV3obg5Jew8-ZaHJNTwIQQT1Sj3RpsbGyk7QHfeDfvf1b1SCoJWqcjD8VO-AI72AVmYcth0nagWLtU0d9gz2yz3b_GQHRjuMCebqffMLCiQi0TXj4QbTxY483eLuGNy_L5d83_0pL7K33mCcaplFAFBb0yR-PeG3sr0q1H0flJRw/s72-c/400um_logo_3rd_attempt.jpg" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-6131208134556499062</guid><pubDate>Tue, 30 Apr 2024 05:44:00 +0000</pubDate><atom:updated>2024-04-30T06:44:17.447+01:00</atom:updated><title>Second Crack At Logo</title><description>Getting closer. You can see the 'u' if you squint...<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheIA6ndx14znICu9OABgVZBpw5irRQfVRqXwQxSv_LqiFniUSdu-3gtf7jZ_5LFPTEDe6JGu2J_x06U5P4Ypj6lXUYIRMsg-dtDPbU3_pHJA0NADCEpF9YmBEa5nsN_W2dQbNmZiiFV5sDtDrgkSrdfgJAcmOuSReM5EdDTCSgO1HQFG2U8nNApWtOZmNe6w/s640/vlcsnap-2024-04-30-17h38m04s431.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="480" data-original-width="640" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheIA6ndx14znICu9OABgVZBpw5irRQfVRqXwQxSv_LqiFniUSdu-3gtf7jZ_5LFPTEDe6JGu2J_x06U5P4Ypj6lXUYIRMsg-dtDPbU3_pHJA0NADCEpF9YmBEa5nsN_W2dQbNmZiiFV5sDtDrgkSrdfgJAcmOuSReM5EdDTCSgO1HQFG2U8nNApWtOZmNe6w/s320/vlcsnap-2024-04-30-17h38m04s431.png" width="320" /></a></div> Getting the Z height right is the tricky part, there being no bed levelling. I'm not sure what increment to move the Z axis down at. Might set up a file that draws a square moving down 0.001mm per corner and keep doing those until I hit the surface.Other developments: UV LED turned up, and it sets the resin I've got. Using the UV hole to illuminate the slide from underneath with white light helps too - I just put a piece of white paper under it and shine the side microscope LED onto the paper. </description><link>http://blog.reprap.org/2024/04/second-crack-at-logo.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheIA6ndx14znICu9OABgVZBpw5irRQfVRqXwQxSv_LqiFniUSdu-3gtf7jZ_5LFPTEDe6JGu2J_x06U5P4Ypj6lXUYIRMsg-dtDPbU3_pHJA0NADCEpF9YmBEa5nsN_W2dQbNmZiiFV5sDtDrgkSrdfgJAcmOuSReM5EdDTCSgO1HQFG2U8nNApWtOZmNe6w/s72-c/vlcsnap-2024-04-30-17h38m04s431.png" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-5496203223127045461</guid><pubDate>Tue, 30 Apr 2024 01:58:00 +0000</pubDate><atom:updated>2024-04-30T02:58:54.516+01:00</atom:updated><title>First Crack At Automated Drawing</title><description>So this is not the most graceful or successful attempt to draw a RepRap logo with a μ in the middle of it, but you can see where I'm headed. It was meant to be 400μm tall but looks a little less. The calibration squares are 50μm on a side. What I think is happening here is that I'm driving the point firmly into the substrate and actually bending the point around as the slide moves. <div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7n0XI2KbyJNTHPEhYOI-0TDduvnwHb6FkxOLlNoolkwOpv5ZK5J9K_bzDxyFE18rLU1eXFVULpZeTCXxMCJtxlmejdqpKM-tTO1_Z1dPvU-T1riqKPv2n7h-spzukeEgPQ3IDCOLUndBT24zG9qTyBPe5HbR_qQtD9Om3MuJLAmrOrhV4M_W3LAG19g-AVA/s959/400um_logo_attempt_2024-04-30_13-48-34.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="959" data-original-width="667" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7n0XI2KbyJNTHPEhYOI-0TDduvnwHb6FkxOLlNoolkwOpv5ZK5J9K_bzDxyFE18rLU1eXFVULpZeTCXxMCJtxlmejdqpKM-tTO1_Z1dPvU-T1riqKPv2n7h-spzukeEgPQ3IDCOLUndBT24zG9qTyBPe5HbR_qQtD9Om3MuJLAmrOrhV4M_W3LAG19g-AVA/s320/400um_logo_attempt_2024-04-30_13-48-34.png" width="223" /></a></div> The cool part though is that this was controlled from the standard cncjs app, so I'm eliminating all my dodgy homebrew interface.That's what I can do with a standard hypodermic needle. Now I have a little more confidence I'll give one of my fine points a go next. </description><link>http://blog.reprap.org/2024/04/first-crack-at-automated-drawing.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7n0XI2KbyJNTHPEhYOI-0TDduvnwHb6FkxOLlNoolkwOpv5ZK5J9K_bzDxyFE18rLU1eXFVULpZeTCXxMCJtxlmejdqpKM-tTO1_Z1dPvU-T1riqKPv2n7h-spzukeEgPQ3IDCOLUndBT24zG9qTyBPe5HbR_qQtD9Om3MuJLAmrOrhV4M_W3LAG19g-AVA/s72-c/400um_logo_attempt_2024-04-30_13-48-34.png" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-2657555478211883474</guid><pubDate>Mon, 29 Apr 2024 07:16:00 +0000</pubDate><atom:updated>2024-04-29T09:52:38.389+01:00</atom:updated><title>Introducing "Titch"</title><description>Here's the first Block Stage prototype which might one day manage actual fabrication. As it has half a chance of working, I've given it a name: "Titch"It is a reinforced OpenFlexure Block Stage with a larger flexure angle (to increase work area) and a probe platform. The probe holder is now canted at 45 degrees so I don't have to bend probe tips. Various holes have been made to make it possible to screw the thing together, and I've upgraded the NEMA17 motor adaptor plates. The whole thing is screwed down to a board together with two USB microscopes: One for gauging probe height, the other with a more expensive 5MP camera for viewing the XY motion. It can be moved around the bench without knocking everything out of alignment. The USB microscopes are still no match for the proper turret microscope but should resolve well-illuminated scratches down to 15-20μm - good enough for lining stuff up. Having a basic XYZ configuration it can be driven with either GRBL or standard RepRap firmware like Marlin. As the angle of the delta struts is no longer an issue, the endstops have been temporarily ditched and I'll roughly centre it with a Mk I Calibrated Eyeball. <div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgkk3ezJ1sRWxb3gZdlS6rR5ks-zAEXNSCPaK2BXTiXrY8qxU9HtEMcb723-47pb1Yg-m3m7LZK1JKOr1R4yAbVRwAimciw37m3iem87BUzYysfOIcM2TjXGLdol2g4Jk11QA1PEZwKwCdbKMrnnm9iolyJMctbwqdoKcPu5jE_m9NW7ppPhA-ivPRei4gk_Q/s4608/IMG_20240429_183325_345.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3456" data-original-width="4608" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgkk3ezJ1sRWxb3gZdlS6rR5ks-zAEXNSCPaK2BXTiXrY8qxU9HtEMcb723-47pb1Yg-m3m7LZK1JKOr1R4yAbVRwAimciw37m3iem87BUzYysfOIcM2TjXGLdol2g4Jk11QA1PEZwKwCdbKMrnnm9iolyJMctbwqdoKcPu5jE_m9NW7ppPhA-ivPRei4gk_Q/s320/IMG_20240429_183325_345.jpg" width="320" /></a></div>The stage is much smaller and so instead of microscope slides I am using 22mm x 22mm x 0.13mm microscope slide cover slips (7 cents each here). Attachment is currently with duct tape which is actually working out quite well.Having less glass in them, the cover slips will let more UV through when it comes to curing resin. The OpenFlexure housing has been modified to have a hole through the stage, and a cavity at the back to stuff a UV light source into. The hole is offset, the theory being that the resin and dunking probe tip will go in the shade when the UV is turned on to cure the resin. Titch is gloriously uncalibrated but I've given it a test flight with cncjs software and it seems to be moving everything consistently. I don't know the actual resolution but it was reliably drawing parallel lines about 30μm apart using a sturdy hypodermic tip. I'll let you know how it goes, and publish the STL files when I've ironed the kinks out. </description><link>http://blog.reprap.org/2024/04/introducing-titch.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgkk3ezJ1sRWxb3gZdlS6rR5ks-zAEXNSCPaK2BXTiXrY8qxU9HtEMcb723-47pb1Yg-m3m7LZK1JKOr1R4yAbVRwAimciw37m3iem87BUzYysfOIcM2TjXGLdol2g4Jk11QA1PEZwKwCdbKMrnnm9iolyJMctbwqdoKcPu5jE_m9NW7ppPhA-ivPRei4gk_Q/s72-c/IMG_20240429_183325_345.jpg" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-1211143374359967189</guid><pubDate>Sun, 28 Apr 2024 10:43:00 +0000</pubDate><atom:updated>2024-04-28T11:43:38.503+01:00</atom:updated><title>First pass at proper prototype</title><description>Well, that didn't work so good. the base part was overly long, lots of holes needed to be drilled to access construction screws, and the anti-backlash bands didn't fit. Darn. I've reworked it, and the reworked version with holes already in it and a bit more reinforcement etc. is now printing. Also, I blew a stepper controller. More updates when the next print is completed. </description><link>http://blog.reprap.org/2024/04/first-pass-at-proper-prototype.html</link><author>noreply@blogger.com (vik-olliver)</author><thr:total>2</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-6310623926066137172</guid><pubDate>Sun, 28 Apr 2024 03:44:00 +0000</pubDate><atom:updated>2024-04-28T04:44:21.809+01:00</atom:updated><title>The μRepRap Is Dead. Long Live The μRepRap.</title><description>Time to announce the decommissioning of the original OpenFlexure delta stage so I can salvage parts to build the new block stage. If I don't announce it, I'll never get round to it, because I'm kinda fond of the thing and it did teach me a heck of a lot. But progress. So here's a photo of it and the optics I use just prior to the salvage operation.<div class="separator" style="clear: both; text-align: center;"></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEggURcwUQAQQAujlritIgVdc9NJDik-tN8W9K6j2LK1eUusoTvbSqvTU9hqrHlvJP4Pymt6Gjl7be2tM90LtKu2KU8Wns01wTXsTyMXoS_0BTAn4hdhAyFkYgu41MGVkjIlMc-uK87Joyx290WrNIaHGx4CrhnoaXqYKxU9Mdht0MvFEBHXSVlqKYA_r660Hg/s4608/IMG_20240428_153905_658.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3456" data-original-width="4608" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEggURcwUQAQQAujlritIgVdc9NJDik-tN8W9K6j2LK1eUusoTvbSqvTU9hqrHlvJP4Pymt6Gjl7be2tM90LtKu2KU8Wns01wTXsTyMXoS_0BTAn4hdhAyFkYgu41MGVkjIlMc-uK87Joyx290WrNIaHGx4CrhnoaXqYKxU9Mdht0MvFEBHXSVlqKYA_r660Hg/s320/IMG_20240428_153905_658.jpg" width="320" /></a></div> </description><link>http://blog.reprap.org/2024/04/the-reprap-is-dead-long-live-reprap.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEggURcwUQAQQAujlritIgVdc9NJDik-tN8W9K6j2LK1eUusoTvbSqvTU9hqrHlvJP4Pymt6Gjl7be2tM90LtKu2KU8Wns01wTXsTyMXoS_0BTAn4hdhAyFkYgu41MGVkjIlMc-uK87Joyx290WrNIaHGx4CrhnoaXqYKxU9Mdht0MvFEBHXSVlqKYA_r660Hg/s72-c/IMG_20240428_153905_658.jpg" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-8980562266813532733</guid><pubDate>Wed, 24 Apr 2024 08:15:00 +0000</pubDate><atom:updated>2024-04-24T09:40:51.668+01:00</atom:updated><title>Z axis variations</title><description>Now I can actually move around and scratch things with the probe I'm noticing an awful lot of variation in the Z axis. Whenever I move to a new bit of the slide, the height is out. I don't know if this is just the setup I have, or if it's a thing with the delta stage in general.However, I've got a lot of data and micron-scale experience from the delta stage. Time to move on to the XYZ stage that has a smaller work area (4x4x2mm) but higher accuracy. Allegedly down to 250nm. That'll take a while to do, so I'll be playing with the delta for a bit longer while I sort it out. The good news is that the XYZ stage should work with standard 3D printer firmware and I can ditch a lot of the more painful delta work.So there are a few things I still want to explore with the delta, mostly involving photopolymer resin tests. I have resin, and a 3W UV lamp is on order. I doubt I'll break any resolution records in the initial tests, but if I can make objects smaller than a millimetre that don't look like a jellyfish I'll be happy. </description><link>http://blog.reprap.org/2024/04/z-axis-variations.html</link><author>noreply@blogger.com (vik-olliver)</author><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-5888581067112944862</guid><pubDate>Tue, 23 Apr 2024 21:28:00 +0000</pubDate><atom:updated>2024-04-23T22:28:11.111+01:00</atom:updated><title>Head Crash At 50μm</title><description>Here's how it works so far. Getting the Z height dialled in is tricky, and I can no longer really see what I'm doing - I'm looking for a spot of light coming through the Sharpie layer on the slide. I have moved to a different marker pen which has a much finer grain to the ink.<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEih5V1C0M1XLULng9GCUqIAlXXCf_J-FVPcYw52lwq2OXxeKZkox2_PM9PSuX9nYEZp11j7W5jz2QZaRL3iwxd-kqCB7OmCCfbQadfDdkPxHQb4atDmyXVyxnfgvoXXGftsTs8QOdnV8wPAWm-a5wH-pxvAxeelKczztbh31hOGYKx568HROUUJTjnWN8i5IA/s640/50_micron_square_crash_2024-04-23_21-59-06.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="481" data-original-width="640" height="241" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEih5V1C0M1XLULng9GCUqIAlXXCf_J-FVPcYw52lwq2OXxeKZkox2_PM9PSuX9nYEZp11j7W5jz2QZaRL3iwxd-kqCB7OmCCfbQadfDdkPxHQb4atDmyXVyxnfgvoXXGftsTs8QOdnV8wPAWm-a5wH-pxvAxeelKczztbh31hOGYKx568HROUUJTjnWN8i5IA/s320/50_micron_square_crash_2024-04-23_21-59-06.png" width="320" /></a></div> So this image shows a trail of Z height adjustment leading up to a 50μm square with a line drawn in the middle of it (actually a 20/30μm split). Note that the Z height is moving within the thickness of a layer of Sharpie ink as I guide it in. Probe tip appears to be about 5μm. Then disaster. I switch from 0.001mm steps to 0.1mm steps to guide the probe out of the way, go the wrong direction on Z, and plough into the slide. The huge gash resulting (top right) is about the thickness of a human hair. The image was taken on a turret microscope after I removed the slide. My best USB macro camera has a fraction of that magnification, and I'm working on a new mount to get it closer. I'm guiding the Z height initially by looking at a side view from another USB macro camera. I'll post a picture of the setup when I fire it up next.Upside: I'm now showing a feature 20μm in size, which beats the resolution of a high-end resin printer if I can keep it up. </description><link>http://blog.reprap.org/2024/04/head-crash-at-50m.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEih5V1C0M1XLULng9GCUqIAlXXCf_J-FVPcYw52lwq2OXxeKZkox2_PM9PSuX9nYEZp11j7W5jz2QZaRL3iwxd-kqCB7OmCCfbQadfDdkPxHQb4atDmyXVyxnfgvoXXGftsTs8QOdnV8wPAWm-a5wH-pxvAxeelKczztbh31hOGYKx568HROUUJTjnWN8i5IA/s72-c/50_micron_square_crash_2024-04-23_21-59-06.png" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-4074921449933163118</guid><pubDate>Mon, 22 Apr 2024 23:36:00 +0000</pubDate><atom:updated>2024-04-23T00:43:53.311+01:00</atom:updated><title>0.1mm Cross - Can I call it microns now?</title><description>Here is a cross made from 0.1mm squares, or 100 microns on a side. Etched into sharpie on a glass slide with a 0.3mm base conical nichrome tip. This is not my sharpest tip but at least the lines are relatively consistent in width on X and Y unlike the hypodermic needle tip. I'm now running into the limits of Sharpie as a substrate. I think I can call it micron scale now with some plausible justification.<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfWzXg8keSj5x3tXa1CXLrUiRVKUNvUUsNC67d539KP-WeN_Pjr0CSRsaOr8bxrksGJlLu7qQupx2CqsNozkfG1XrmxYEBPMPKtLrsifJSGNiWGsjpPuLyDUj0akADi07CCpisa8qabBCvNkTpr4ROKPttITI5igu4uKus-TwPtweXu2emHh_MTmM2MH_xfQ/s721/cross_0.1mm-2024-04-23-11h15m06s120.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="366" data-original-width="721" height="162" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfWzXg8keSj5x3tXa1CXLrUiRVKUNvUUsNC67d539KP-WeN_Pjr0CSRsaOr8bxrksGJlLu7qQupx2CqsNozkfG1XrmxYEBPMPKtLrsifJSGNiWGsjpPuLyDUj0akADi07CCpisa8qabBCvNkTpr4ROKPttITI5igu4uKus-TwPtweXu2emHh_MTmM2MH_xfQ/s320/cross_0.1mm-2024-04-23-11h15m06s120.png" width="320" /></a></div>Calibration slide shows 0.05mm or 50 micron squares. </description><link>http://blog.reprap.org/2024/04/01mm-cross-can-i-call-it-microns-now.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfWzXg8keSj5x3tXa1CXLrUiRVKUNvUUsNC67d539KP-WeN_Pjr0CSRsaOr8bxrksGJlLu7qQupx2CqsNozkfG1XrmxYEBPMPKtLrsifJSGNiWGsjpPuLyDUj0akADi07CCpisa8qabBCvNkTpr4ROKPttITI5igu4uKus-TwPtweXu2emHh_MTmM2MH_xfQ/s72-c/cross_0.1mm-2024-04-23-11h15m06s120.png" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-5322277467610211714</guid><pubDate>Mon, 22 Apr 2024 07:26:00 +0000</pubDate><atom:updated>2024-04-22T08:26:16.803+01:00</atom:updated><title>0.2mm square vs. calibration slide</title><description>Nothing like proving your results. On the left we have my notional 0.2mm square (somewhat dusty by now) scratched into a sharpie-covered slide. On the right we have my new 0.01mm/div calibration slide. The small squares in the centre are 0.05mm a side each. So yes, I'm at about 0.2mm and can prove it. I'll freely admit I need to get my steps/mm dialled in a bit better but my efforts are pretty much within the error of line widths. With the big microscope though it's possible to see that even with the (relatively) chonky hypodermic needle tip the interior corners of the square are nice and sharp.<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj8N8gqVlRF2gEQOp0pLDkh4R4cdg5grXfBR_Kf9INjs2STpJMi0UN34ze1mm7K7UFRac59BECpbXQGei_iufW-C5yUPRGRuiM8S9XelY4JfBPPzYc7AAKcfoVKVjocw_R3KoU2QCk8oNGT4kNjMYTgTP7f0RFI5EPFvea-1OtVSPw1QW2lLPs9-2Il1AESwQ/s1215/Square_vs_callibration_2024-04-22_19-08-12.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="487" data-original-width="1215" height="128" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj8N8gqVlRF2gEQOp0pLDkh4R4cdg5grXfBR_Kf9INjs2STpJMi0UN34ze1mm7K7UFRac59BECpbXQGei_iufW-C5yUPRGRuiM8S9XelY4JfBPPzYc7AAKcfoVKVjocw_R3KoU2QCk8oNGT4kNjMYTgTP7f0RFI5EPFvea-1OtVSPw1QW2lLPs9-2Il1AESwQ/s320/Square_vs_callibration_2024-04-22_19-08-12.png" width="320" /></a></div>We can also see that the hypodermic tip is cutting a swath about 25 microns in one direction and 50 microns in a perpendicular direction, which one might expect as the things are obliquely sharpened. The image of the square is at an angle basically because I mounted the slide in the μRepRap at an angle when I cut it. Bits of equipment just got in the way... I've made headway into being able to set up the Z axis in software, so I might risk a slightly sharper, conical tip. I'll make one out of 0.3mm wire and try not to make it too pointy. </description><link>http://blog.reprap.org/2024/04/02mm-square-vs-calibration-slide.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj8N8gqVlRF2gEQOp0pLDkh4R4cdg5grXfBR_Kf9INjs2STpJMi0UN34ze1mm7K7UFRac59BECpbXQGei_iufW-C5yUPRGRuiM8S9XelY4JfBPPzYc7AAKcfoVKVjocw_R3KoU2QCk8oNGT4kNjMYTgTP7f0RFI5EPFvea-1OtVSPw1QW2lLPs9-2Il1AESwQ/s72-c/Square_vs_callibration_2024-04-22_19-08-12.png" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-8683832282711203230</guid><pubDate>Sun, 21 Apr 2024 21:47:00 +0000</pubDate><atom:updated>2024-04-21T22:57:44.600+01:00</atom:updated><title>Back again. Implementing CNC-like controls</title><description>EverythingOpen conference presentation done, back to project work. I'm implementing CNC-like controls to home the axes and set the zero positions for XY and Z to allow CNC-like control.This is not a straightforward as it seems. I can't just tell the GRBL to home because the XYZ on the GRBL does not correspond to the XYZ of the stage. So to do a HOME I have to first position the stage XY to zero, then move stage Z to zero. This stops me dragging the probe over the stage, and I think that bit works.Setting new zero positions for XY and Z before beginning "work" has a similar problem, so I have to design a relative zero for all axes and factor that in for all move commands. Haven't done that yet.Finally, I'll want to read in a gcode file and move the stage around. Again, this requires translating stage positions into relative positions, then moving the towers with GRBL. I'll experiment with using jscut <a href="http://jscut.org">http://jscut.org</a> to generate the gcode from SVG files. I'll probably have to implement some kind of scaling system for the gcode because I'm not sure how jscut will handle very tiny numbers (Inkscape certainly fails on this). </description><link>http://blog.reprap.org/2024/04/back-again-implementing-cnc-like.html</link><author>noreply@blogger.com (vik-olliver)</author><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-3830704641108078025</guid><pubDate>Mon, 08 Apr 2024 08:33:00 +0000</pubDate><atom:updated>2024-04-08T09:33:18.440+01:00</atom:updated><title>Heads Up - Off to EverythingOpen for a couple of weeks</title><description>Minimal updates for a week or two as I'm preparing for and heading to EverythingOpen in Gladstone, Australia to present on the <a href="https://2024.everythingopen.au/schedule/presentation/13/" target="_blank">Quirkey accessibility keyboard</a>. This takes me away from the hardware which is a bit of an embuggerance in the development department. I'm deliberately not fixing a broken axis at the moment so I concentrate on the presentation, trip prep., instructions for house-sitter, last minute house maintenance etc. There is some new software I'm working on though, to create test gcode patterns. I have that and new stage designs to work on while stuck in airports and hotels, so expect to be fully occupied. </description><link>http://blog.reprap.org/2024/04/heads-up-off-to-everythingopen-for.html</link><author>noreply@blogger.com (vik-olliver)</author><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-11782491962081501</guid><pubDate>Sun, 07 Apr 2024 06:13:00 +0000</pubDate><atom:updated>2024-04-07T07:13:22.883+01:00</atom:updated><title>How far can the μRepRap concept be pushed?</title><description>Just posted this on the wiki, and posting here for comment:"As with the original RepRap, it is hoped that once the first μRepRap is operational, it will be able to replicate. Unlike the original, the replicant will not be identical to its parent but will be a much smaller functional equivalent. Control of the replicant will be difficult, but not impractical. Options include perpendicular magnetic fields, inducing vibrations to operate ratchet mechanisms or tuned structures, or at its most basic cranking the mechanism with the tip of a probe until something better can be worked out. It might also be possible to fabricate a μRepRap that is scaled down further. Assume that a RepRap has a precision of approximately 0.2mm on a 200x200mm work area, and a μRepRap has approximately 1 micron resolution on a 10x10mm work area. We see roughly two to three magnitudes in reduction in scale. If flexure systems also scale, then it might be possible to use a μRepRap to create a smaller printer with a resolution on the nanometre scale. Unlike current attempts to operate with nanometre precision with macro scale hardware, errors in the device due to thermal expansion and other material-related noise would be much reduced. It would at least be interesting to see how far this limit could be pushed." </description><link>http://blog.reprap.org/2024/04/how-far-can-reprap-concept-be-pushed.html</link><author>noreply@blogger.com (vik-olliver)</author><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-2760372062176920952</guid><pubDate>Fri, 05 Apr 2024 08:35:00 +0000</pubDate><atom:updated>2024-04-05T09:35:58.358+01:00</atom:updated><title>The band broke up, and I'm thinking about the dark side.</title><description>I keep snapping the 'O'-rings on the OpenFlexure stage, probably because I'm pushing the range of movement more than the average microscope user. That's going to have to change, probably using anti-backlash nuts like the old Darwin printer's Z stage. There are a few other things I want to hack about: Proper motor mounts, extra platforms and attachment points, new flexures, better gearing, more access the the mechanism, cable guides etc. but it's going to have to wait until I've finished presenting at <a href="https://2024.everythingopen.au/schedule/presentation/13/" target="_blank">EverythingOpen</a>. Once I've decompressed from that trip I'll be able to focus on μRepRap properly. I have some photosensitive resin ready for dip-pen tests too, but blowed if I can find my stash of UV LEDs anywhere.I plan on having a darkened resin reservoir on the slide, and illuminating from below. This will avoid having to shield the probe or the resin reservoir during UV exposure cycles. Hopefully cheap soda lime glass slides will let enough UV through. </description><link>http://blog.reprap.org/2024/04/the-band-broke-up-and-im-thinking-about.html</link><author>noreply@blogger.com (vik-olliver)</author><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-3226676239468910869</guid><pubDate>Thu, 04 Apr 2024 08:21:00 +0000</pubDate><atom:updated>2024-04-04T09:21:57.592+01:00</atom:updated><title>Endstop switch feet for OpenFlexure Delta Stage</title><description>I should probably have mentioned this earlier, but in order to run the stage it helps a lot to have some way of levelling it. So I modified the OpenFlexure Delta Stage feet (<a href="https://www.printables.com/model/827788-probe-arm-and-endstop-switch-feet-for-openflexure" target="_blank">STL files here</a>) to accept microswitches, which can be wired up as the negative endstops for the GRBL CNC driver. This is never going to level the thing to the nearest micron, but it gives you a convenient way of getting to some kind of starting point. Once you have levelled it, you can just return the axes to zero before powering the stage off. I'll add a home button to the Control Panel later.<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxjbVu1vpBuA51JxDDaUiYyEP50HuuyHnVg6rrGqNn6oy9pLHOIw7Dgr1WEG0WuWY7AA2dLpMSaUId8uKF8ki2MwHQRs3arcXwvT_uWT3EH8W2DnUxQ4hyPW5Q4vKUxTTQcML4HXPJsKdOPY5E99KOdhyphenhyphen9K-RQLqxg-THhTWs5a8rydaQIZBIjwXvypRM3bQ/s580/Screenshot_2024-04-04_21-16-24.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="519" data-original-width="580" height="286" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxjbVu1vpBuA51JxDDaUiYyEP50HuuyHnVg6rrGqNn6oy9pLHOIw7Dgr1WEG0WuWY7AA2dLpMSaUId8uKF8ki2MwHQRs3arcXwvT_uWT3EH8W2DnUxQ4hyPW5Q4vKUxTTQcML4HXPJsKdOPY5E99KOdhyphenhyphen9K-RQLqxg-THhTWs5a8rydaQIZBIjwXvypRM3bQ/s320/Screenshot_2024-04-04_21-16-24.png" width="320" /></a></div> </description><link>http://blog.reprap.org/2024/04/endstop-switch-feet-for-openflexure.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxjbVu1vpBuA51JxDDaUiYyEP50HuuyHnVg6rrGqNn6oy9pLHOIw7Dgr1WEG0WuWY7AA2dLpMSaUId8uKF8ki2MwHQRs3arcXwvT_uWT3EH8W2DnUxQ4hyPW5Q4vKUxTTQcML4HXPJsKdOPY5E99KOdhyphenhyphen9K-RQLqxg-THhTWs5a8rydaQIZBIjwXvypRM3bQ/s72-c/Screenshot_2024-04-04_21-16-24.png" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-2992463360721735315</guid><pubDate>Wed, 03 Apr 2024 03:38:00 +0000</pubDate><atom:updated>2024-04-03T06:20:41.728+01:00</atom:updated><title>Modular code update</title><description>I've separated the GRBL/delta Control Panel code out into three modules to make it easier to maintain. They're not "proper" python modules yet, but it all works <a href="https://github.com/VikOlliver/RepRapMicron">https://github.com/VikOlliver/RepRapMicron</a>. Now it actually has a V0.01 version number![Updated update: Now modules are used properly] <div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdkbyA-ryRkZWp8j3-lrEHVcG52BDDe9ugPVo1YQZZBObIGY0aznyr9-tBlR6Fk8h-Oa90SIVgAC-1c98vYQ-2h2u51o9M2qzsWgksKPFXXXYzH_fDFGZjA2dlDMIoEPQVAnydT7B3L4uWZBadiN-cjH8BAtmTafU9sz1syvtw2PspuIi30Lz_IXeFN-pUTA/s663/Screenshot_2024-04-03_18-19-35.png" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img border="0" data-original-height="385" data-original-width="663" height="186" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdkbyA-ryRkZWp8j3-lrEHVcG52BDDe9ugPVo1YQZZBObIGY0aznyr9-tBlR6Fk8h-Oa90SIVgAC-1c98vYQ-2h2u51o9M2qzsWgksKPFXXXYzH_fDFGZjA2dlDMIoEPQVAnydT7B3L4uWZBadiN-cjH8BAtmTafU9sz1syvtw2PspuIi30Lz_IXeFN-pUTA/s320/Screenshot_2024-04-03_18-19-35.png" width="320" /></a></div></description><link>http://blog.reprap.org/2024/04/modular-code-update.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdkbyA-ryRkZWp8j3-lrEHVcG52BDDe9ugPVo1YQZZBObIGY0aznyr9-tBlR6Fk8h-Oa90SIVgAC-1c98vYQ-2h2u51o9M2qzsWgksKPFXXXYzH_fDFGZjA2dlDMIoEPQVAnydT7B3L4uWZBadiN-cjH8BAtmTafU9sz1syvtw2PspuIi30Lz_IXeFN-pUTA/s72-c/Screenshot_2024-04-03_18-19-35.png" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-1009243754910430418</guid><pubDate>Mon, 01 Apr 2024 21:27:00 +0000</pubDate><atom:updated>2024-04-01T22:27:47.261+01:00</atom:updated><title>Software on GitHub</title><description>I've tried to make the software I'm using to control the prototype available on Gitlab, but I don't seem to be able to set it to public. So, back to GitHub it is: <a href="https://github.com/VikOlliver/RepRapMicron">https://github.com/VikOlliver/RepRapMicron</a>&nbsp;<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9Gq7a0xP5T2QyS_DUVs_DrrIC3G1q1y4doEGpDvFg9zya0lYO_gx_0HqeulfDP-hbeHsB7nMh_X8SSmXcmSmiPuEsmmekwOMUCYkOCcjPSDHeTYigpPafUcCAj9YkKTDknnjg9Vm9h-yn2712lkkCzcZAPDozPiom7RJOgYl5diDrRjKNBj2yqLnwHNc1HQ/s682/screenshot_of_control_panel.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="439" data-original-width="682" height="206" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9Gq7a0xP5T2QyS_DUVs_DrrIC3G1q1y4doEGpDvFg9zya0lYO_gx_0HqeulfDP-hbeHsB7nMh_X8SSmXcmSmiPuEsmmekwOMUCYkOCcjPSDHeTYigpPafUcCAj9YkKTDknnjg9Vm9h-yn2712lkkCzcZAPDozPiom7RJOgYl5diDrRjKNBj2yqLnwHNc1HQ/s320/screenshot_of_control_panel.png" width="320" /></a></div>As a quick update, here's progress. We're down to a 0.2mm square etch now:<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhJQ0jHSqreNBBrZqUStHgSNkKfMrtGn9R0oLAu4wsPMrkfV4IrdZpwnWreT7K9SwCutCQo9NoNCK_16fOAeYVgog_mkU5_aYaJ5xQeak97-dnztOem6ZmiyHtjGQkf6IJMOhO7RM7EG0X-LRXE2j_64YZrnqUbmsXTDKrRuzt_4NAccYO4CCsX2mYJOKDF_Q/s396/A_200_micron_square.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="392" data-original-width="396" height="317" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhJQ0jHSqreNBBrZqUStHgSNkKfMrtGn9R0oLAu4wsPMrkfV4IrdZpwnWreT7K9SwCutCQo9NoNCK_16fOAeYVgog_mkU5_aYaJ5xQeak97-dnztOem6ZmiyHtjGQkf6IJMOhO7RM7EG0X-LRXE2j_64YZrnqUbmsXTDKrRuzt_4NAccYO4CCsX2mYJOKDF_Q/s320/A_200_micron_square.jpg" width="320" /></a></div> </description><link>http://blog.reprap.org/2024/04/software-on-github.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9Gq7a0xP5T2QyS_DUVs_DrrIC3G1q1y4doEGpDvFg9zya0lYO_gx_0HqeulfDP-hbeHsB7nMh_X8SSmXcmSmiPuEsmmekwOMUCYkOCcjPSDHeTYigpPafUcCAj9YkKTDknnjg9Vm9h-yn2712lkkCzcZAPDozPiom7RJOgYl5diDrRjKNBj2yqLnwHNc1HQ/s72-c/screenshot_of_control_panel.png" height="72" width="72"/><thr:total>0</thr:total></item><item><guid isPermaLink="false">tag:blogger.com,1999:blog-12223283.post-8053165335843984417</guid><pubDate>Mon, 01 Apr 2024 02:17:00 +0000</pubDate><atom:updated>2024-04-01T04:46:54.845+01:00</atom:updated><title>Output From First Prototype</title><description>Cut to the chase, first output proving the delta mechanism and code. A 0.5mm square drawn inside a 1mm square:<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiAyqMyYiTB7KNPZYII7Oo4G-3uB4RD4w1wWZyfPZ6BHotDyvGcW8VOnmlUfguyazxWNs3vOofujNvVpQ3U-C7ET1NWOnCgjoHpBwWC1qV9-iFG7Xx6SUBto1hWeOYoqyMogZC9BDzl6JsrUMgaASbHDDuCZ7Ql1zafj_OHB4sDbXNLTSPrw6DWttnwRmIjMQ/s1248/First_square_with_M3_2024-04-01_14-07-00.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="990" data-original-width="1248" height="254" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiAyqMyYiTB7KNPZYII7Oo4G-3uB4RD4w1wWZyfPZ6BHotDyvGcW8VOnmlUfguyazxWNs3vOofujNvVpQ3U-C7ET1NWOnCgjoHpBwWC1qV9-iFG7Xx6SUBto1hWeOYoqyMogZC9BDzl6JsrUMgaASbHDDuCZ7Ql1zafj_OHB4sDbXNLTSPrw6DWttnwRmIjMQ/s320/First_square_with_M3_2024-04-01_14-07-00.png" width="320" /></a></div> In the lower right corner you can see an M3 screw thread (and its shadow). This has a pitch of 0.5mm, so I used it for scale (which is undoubtedly not perfect yet, but close). I'm sure I can do a lot finer, but this is the first ever test and I'm using a relatively huge needle point that I can actually see with modest magnification. Sorry about the lighting, fix that in the next version.<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjIOcoeIh3bIfAVcPsczrnYQZljpTH3koYNBsBab4jn7eFTVqRgUdsJMEacyWcv7WSp7anNCpbonEqRP1K61e0wyKB7DzRHz-KY0tadzgjMdd1kSn39gpm8olISp-kru0HubvDmw-NzO0LwCkwYA2bcdh0Ez_UC0B_u4TJ-1reOLTxL9ZJT6mzT7ZmSR0Pc7g/s4608/IMG_20240401_141636_386.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3456" data-original-width="4608" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjIOcoeIh3bIfAVcPsczrnYQZljpTH3koYNBsBab4jn7eFTVqRgUdsJMEacyWcv7WSp7anNCpbonEqRP1K61e0wyKB7DzRHz-KY0tadzgjMdd1kSn39gpm8olISp-kru0HubvDmw-NzO0LwCkwYA2bcdh0Ez_UC0B_u4TJ-1reOLTxL9ZJT6mzT7ZmSR0Pc7g/s320/IMG_20240401_141636_386.jpg" width="320" /></a></div> &nbsp;The hardware is a modified OpenFlexure Delta Stage with the multipath lighting platform on it, which I have uploaded <a href="https://www.printables.com/model/797699-openflexure-delta-microscope-mods-to-fit-nema17-st" target="_blank">here</a>. Attached to that stage is a probe arm, 3D models <a href="https://www.printables.com/model/827788-probe-arm-and-endstop-switch-feet-for-openflexure" target="_blank">found here</a>. The probe arm mechanism allows coarse manual positioning.<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiwJdFLcWVyckmsGuaCC4wvOFstCI57Leo61dOCxi9WyP_Yppg2eazP0X-3c32WWVptvhQ1Vmy-Ptqt-lJUbLBecoqWi0GTpbDmTruejwXqVgHVUfws0vPlVONw0VnQeldpqqH0SBuc0hCoUXzgR1el0qp-j6tx2ylQg_EmHqR2BktuRYevyBSIFuWY-AfOPQ/s4608/IMG_20240401_144612_395.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3456" data-original-width="4608" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiwJdFLcWVyckmsGuaCC4wvOFstCI57Leo61dOCxi9WyP_Yppg2eazP0X-3c32WWVptvhQ1Vmy-Ptqt-lJUbLBecoqWi0GTpbDmTruejwXqVgHVUfws0vPlVONw0VnQeldpqqH0SBuc0hCoUXzgR1el0qp-j6tx2ylQg_EmHqR2BktuRYevyBSIFuWY-AfOPQ/s320/IMG_20240401_144612_395.jpg" width="320" /></a></div> &nbsp;The feet of the modified stage contain microswitches (files found with the probe arm), which allows the GRBL firmware on the RAMPS board to roughly level and position the stage using the standard homing algorithm. I'll upload the configuration later, but it is using <a href="https://github.com/robottini/grbl-servo" target="_blank">Robotini GRBL Servo</a> code with the Configuration.h file modified to allow simultaneous homing of X, Y &amp; Z axes.<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjvylnS57nh1OYn1XN78D0aJOSRtQbAWVEwD0JuTW2XIUllulFshJEN-xp-arqM-xS7ubc-ToI5jvxjh_b-ZDFejNSXMLtGvYXEpX-Thh9kracJITr3nurtxKHufAt97UcRyVRGphQCSzUzYDqRcoRNFLq2JVZuzeUQb42-L9sdnmIuazaQu_hEc5Rg3tLtmg/s4608/IMG_20240330_121128_223.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3456" data-original-width="4608" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjvylnS57nh1OYn1XN78D0aJOSRtQbAWVEwD0JuTW2XIUllulFshJEN-xp-arqM-xS7ubc-ToI5jvxjh_b-ZDFejNSXMLtGvYXEpX-Thh9kracJITr3nurtxKHufAt97UcRyVRGphQCSzUzYDqRcoRNFLq2JVZuzeUQb42-L9sdnmIuazaQu_hEc5Rg3tLtmg/s320/IMG_20240330_121128_223.jpg" width="320" /></a></div> &nbsp;The PC-side probe control software is ugly work, but I am working up the courage to post it. Have patience. Update: I put <a href="https://gitlab.com/reprap/reprapmicron" target="_blank">the code</a> up. </description><link>http://blog.reprap.org/2024/04/output-from-first-prototype.html</link><author>noreply@blogger.com (vik-olliver)</author><media:thumbnail xmlns:media="http://search.yahoo.com/mrss/" url="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiAyqMyYiTB7KNPZYII7Oo4G-3uB4RD4w1wWZyfPZ6BHotDyvGcW8VOnmlUfguyazxWNs3vOofujNvVpQ3U-C7ET1NWOnCgjoHpBwWC1qV9-iFG7Xx6SUBto1hWeOYoqyMogZC9BDzl6JsrUMgaASbHDDuCZ7Ql1zafj_OHB4sDbXNLTSPrw6DWttnwRmIjMQ/s72-c/First_square_with_M3_2024-04-01_14-07-00.png" height="72" width="72"/><thr:total>1</thr:total></item></channel></rss>

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