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<?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/"> <channel> <title>Reprap Forum - RAMPS Electronics</title> <description>Support for the quite nice RAMPS Electronics. See also http://reprap.org/wiki/RAMPS.</description> <link>https://reprap.org/forum/list.php?219</link> <lastBuildDate>Wed, 08 May 2024 13:36:30 -0400</lastBuildDate> <generator>Phorum 5.2.23</generator> <item> <guid>https://reprap.org/forum/read.php?219,894532,894532#msg-894532</guid> <title>My RAMPS1.4 doesn't work when controlled by Raspberry PI 5 via Python3</title> <link>https://reprap.org/forum/read.php?219,894532,894532#msg-894532</link> <description><![CDATA[ Hello,<br />When I use my Windows device to control ramps1.4 (mounted on mega Arduino) via Python3, by g code like this:<br />...<br />import serial<br />import time<br /><br />myPort = serial.Serial('COM7', 250000, parity='N')<br />time.sleep(1)<br /><br />myPort.write('M302 S0\n'.encode())<br />myPort.write('G1 Z-50 F1000000\n'.encode())<br />myPort.write('M84\n'.encode())<br />...<br />everything is good and my step motors work. Next, when I connect this board to my Raspberry Pi5 device and change the 'myPort' code to 'myPort = serial.Serial('/dev/ttyACM0', 250000, parity='N')' connection is established and RAMPS1.4 light flashing to tell us that port is connected but my g code does not work and step motors remain motionless (without any error). First I thought that's issue relates to the Baud rate. So, to solve this problem I tried to change the baud rate in Raspberry Pi 5 via this code 'stty -F /dev/ttyACM0 115200' and checked it again, but that did not work either. Also, I tried any other standard baud rate and failed at all of them. And now, I don't know how to solve it.]]></description> <dc:creator>civil.shakeri</dc:creator> <category>RAMPS Electronics</category> <pubDate>Sun, 17 Mar 2024 13:22:40 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,835614,894500#msg-894500</guid> <title>Re: RAMPS 1.4 and external mosfets</title> <link>https://reprap.org/forum/read.php?219,835614,894500#msg-894500</link> <description><![CDATA[ I wanted to add that with the external mosfet board attached, I can't get the heated bed to go over 33c even if I set the target temperature to 60c.<br /><br />With the setup without the mosfet board, I have no trouble reaching 60c. It is not fast but it does not time out.]]></description> <dc:creator>ChileMaker</dc:creator> <category>RAMPS Electronics</category> <pubDate>Fri, 08 Mar 2024 17:02:25 -0500</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,835614,894496#msg-894496</guid> <title>Re: RAMPS 1.4 and external mosfets</title> <link>https://reprap.org/forum/read.php?219,835614,894496#msg-894496</link> <description><![CDATA[ Hi Dust.<br /><br />Here are some pictures of the wiring. <br /><br />1. The wiring at the module<br />2. The wire going to the headbed<br />3. The connector for the sensor at D8.<br />4. The power connector at the Ramps for the 11a.<br />5. Alternative wiring. I went ahead and tried a pass through on the power wiring<br /> where I go from the PS to the external mosfet board and then to the Ramps at the 11a.<br /> This diagram isn't a Ramps board, but it best shows the pass through I am talking about.<br /> I do have a power connection to the 5a side of the Ramps, I never removed that.<br />6. Close up of one of the Mosfet modules I have.]]></description> <dc:creator>ChileMaker</dc:creator> <category>RAMPS Electronics</category> <pubDate>Fri, 08 Mar 2024 07:24:19 -0500</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,835614,894494#msg-894494</guid> <title>Re: RAMPS 1.4 and external mosfets</title> <link>https://reprap.org/forum/read.php?219,835614,894494#msg-894494</link> <description><![CDATA[ @ChileMaker <br /><br />how about some pictures of the mosfet modules and where all the wires actually go?<br /><br />the MK52 is about 1ohm so pulls about 12 amps, most external mosfets should be able to do that easily <br /><br />This doesn't really make sense from the description...<br /><br />The connection form D8 to the module is just the on/off signal, it has practically no current. It normally goes to a optocoupler so is just turning on two LEDs (the blue one and one you cant see)]]></description> <dc:creator>Dust</dc:creator> <category>RAMPS Electronics</category> <pubDate>Fri, 08 Mar 2024 06:32:27 -0500</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,835614,894493#msg-894493</guid> <title>Re: RAMPS 1.4 and external mosfets</title> <link>https://reprap.org/forum/read.php?219,835614,894493#msg-894493</link> <description><![CDATA[ Hi Dust. <br /><br />I forgot to mention some of those particulars. The board is a genuine Prusa MK52 that is 210x250 and is 12v. It is not a Prusa printer but a Mendel variant that I upgraded over time. I had been just using PLA and having the bed go to 60c. Before I added the mosfet board, I had no trouble getting the heatbed to 75c, but it wouldn't get past that before the alarm sounded due to its taking too long to heat. I wanted to try some ABS I had so that's why I added the mosfet board. I have no problem getting the hotend to temperature so it can extrude the ABS. My Prusa MK3x has no trouble getting the bed to temperature for ABS, but it is a 24v system.<br /><br />When powered up, the mosfet board's little red led is lit. When I attempt to heat up the bed, the little blue led lights. The red led for the MK52 I hooked up and tried another mosfet board (same type) and the same thing happened.]]></description> <dc:creator>ChileMaker</dc:creator> <category>RAMPS Electronics</category> <pubDate>Fri, 08 Mar 2024 06:13:23 -0500</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,835614,894491#msg-894491</guid> <title>Re: RAMPS 1.4 and external mosfets</title> <link>https://reprap.org/forum/read.php?219,835614,894491#msg-894491</link> <description><![CDATA[ @ChileMaker <br /><br />The wiring diagram and description sound correct<br /><br />Perhaps your bed is just to to massive a current draw for the mosfet?]]></description> <dc:creator>Dust</dc:creator> <category>RAMPS Electronics</category> <pubDate>Fri, 08 Mar 2024 01:50:08 -0500</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,835614,894488#msg-894488</guid> <title>Re: RAMPS 1.4 and external mosfets</title> <link>https://reprap.org/forum/read.php?219,835614,894488#msg-894488</link> <description><![CDATA[ I tried to add an external mosfet board to my Ramps 1.4 board, but it didn't work for me. I have a 12v S360-30 PS with three outputs.<br /><br />This is what I did. I originally had two of the outputs from the PS go to the inputs of the Ramps 1.4 board, one to the 11a side and one to the 5a side. I took the third output from the PS and hooked it up to the external mosfet board on its PS connectors. Correct polarity on all of the outputs. I hooked the heatbed up to the external mosfet board on its heatbed connectors. I hooked up the sensor wires from the external mosfet board to the D8 connector on the Ramps 1.4 board where the heatbed wires were connected.<br /><br />The external mosfet got really hot and the the heat bed didn't heat up. I surely messed up the wiring.<br /><br />Should I have shared the PS output that went to the 11A on the Ramps board, with the input on the external mosfet board instead of using that third output?]]></description> <dc:creator>ChileMaker</dc:creator> <category>RAMPS Electronics</category> <pubDate>Thu, 07 Mar 2024 19:29:27 -0500</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893942,893946#msg-893946</guid> <title>Re: Preheat test damaged the board - ramps 1.4</title> <link>https://reprap.org/forum/read.php?219,893942,893946#msg-893946</link> <description><![CDATA[ I changed the temperature sensor settings to 8 and I can see correct values in the lcd.<br /><br />I can heat the hotbed and hotend separately.<br />I can power fans.<br /><br />I tried to print a test cube and I broke the regulator again.]]></description> <dc:creator>Pencil42</dc:creator> <category>RAMPS Electronics</category> <pubDate>Sun, 24 Dec 2023 15:37:50 -0500</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893942,893942#msg-893942</guid> <title>Preheat test damaged the board - ramps 1.4</title> <link>https://reprap.org/forum/read.php?219,893942,893942#msg-893942</link> <description><![CDATA[ Hello everyone, <br /><br />I'm building a custom 3d printer using ramps 1.4 board.<br />Thanks to reprap community, I've completed to run motors and endstoppers very quickly.<br /><br />I have connected the mk3 heatbed to D8 and mk8 hotend to D10.<br />They both have 100K NTCs.<br />Hotend thermistor was connected to T0, and hotbed thermistor was connected to T1.<br />In the configuration file, hotend sensor setting was 1, sensor0.<br />Hotbed sensor setting was 0.<br /><br />When I chose preheat from lcd menu, a red led on ramps was on for about 5 seconds then I lost view from lcd screen.<br /><br />I checked the regulator on arduino and middle pin gives around 3 volts. Now I will change the regulator but what is my problem?<br /><br />NTCs and heater don't have polarity.<br />I was testing for pla.<br /><br />My endstoppers may be active while I was making preheat test, does this may be the reason?<br /><br />Thanks.]]></description> <dc:creator>Pencil42</dc:creator> <category>RAMPS Electronics</category> <pubDate>Sun, 24 Dec 2023 11:31:06 -0500</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893786,893786#msg-893786</guid> <title>Problem with output D10</title> <link>https://reprap.org/forum/read.php?219,893786,893786#msg-893786</link> <description><![CDATA[ Hello. I built a homemade printer using ramps 1.4 and I have a problem with the extruder. <br />When I energize the ramps, the extruder starts to heat up and continues indefinitely (it only stops heating when I remove the power). <br />I believed it could be a problem with the Q1 mosfet but even after replacing it the problem continues. <br />I removed the hotend wires from the D10 connector and measured the voltage with a multimeter on the connector pins. It has 12v as soon as I power the ramps.<br />Does anyone have an idea what it could be? <br /><br />Marlin is configured as 1.4 EFB]]></description> <dc:creator>magflip</dc:creator> <category>RAMPS Electronics</category> <pubDate>Tue, 14 Nov 2023 04:12:59 -0500</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893601,893605#msg-893605</guid> <title>Re: Triple z motor controller with Ramps 1.4</title> <link>https://reprap.org/forum/read.php?219,893601,893605#msg-893605</link> <description><![CDATA[ You're right, I re-looked at it after your reply and I have aux-2 un-used and it has 8 pins available. I think I'll go for D63 -> En, D40 -> Dir and D42 -> step.<br /><br />Stepper Motor Driver Expansion Board<br /><br />[attachment 120592 Capture.PNG]]]></description> <dc:creator>Slapparoo</dc:creator> <category>RAMPS Electronics</category> <pubDate>Thu, 12 Oct 2023 05:30:05 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893601,893602#msg-893602</guid> <title>Re: Triple z motor controller with Ramps 1.4</title> <link>https://reprap.org/forum/read.php?219,893601,893602#msg-893602</link> <description><![CDATA[ That is overly complicated.. <br /><br />ramps has oodles of spare IO pins, just set them up with their own step and direction pins <br /><br />Adding a stepper driver just needs two io pins. step and direction, enable can be hard wired on]]></description> <dc:creator>Dust</dc:creator> <category>RAMPS Electronics</category> <pubDate>Thu, 12 Oct 2023 02:39:07 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893601,893601#msg-893601</guid> <title>Triple z motor controller with Ramps 1.4</title> <link>https://reprap.org/forum/read.php?219,893601,893601#msg-893601</link> <description><![CDATA[ Hi, I'm not sure if this has been considered previously and already solved (or maybe its not a good Idea), I am keen on a Voron esk printer, but I'm not keen on the price, I was thinking I can get a triple z driver controller through Ramps 1.4 board (with a couple of wires hanging off the side).<br /><br />What I am thinking for the Z I would use the 2 E's and Z becomes E, but for the wiring of Z there would be 3 semi independent stepper drivers, the catch being they would have a common direction and common enable, so all 3 Z stepper drivers would share a common direction, allowing them to move independently of each other as long as its in the same direction, so the first stepper driver would be wired as per normal, then Z2 (initially wired up through an external bread board) would use the enable and direction from Z1, thus freeing up its direction to be used by Z3 as the step.<br /><br />What I am after I guess is has this problem already been solved with ramps? so what I would end up with is being able to driver 6 stepper motors off a ramps. They Z wouldn't be in unison but would be confederated.<br /><br />I realise there are other pinouts which could be repurposed for a stepper, but one of the advantages I see is that is does not compromise any other feature on the board, the only compromise is that all 3 Z's will move in the same direction.<br /><br />This should also allow for Z tilting as long as it is one stepper at a time.]]></description> <dc:creator>Slapparoo</dc:creator> <category>RAMPS Electronics</category> <pubDate>Thu, 12 Oct 2023 02:15:23 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,806571,893595#msg-893595</guid> <title>Re: E0 - Extruder Motor Getting No Current/Signal</title> <link>https://reprap.org/forum/read.php?219,806571,893595#msg-893595</link> <description><![CDATA[ Hi all I have the same problem I swapped out the mega 2560 and fitted a new Ramps 1.4 fitted all new A4988 drivers and tuned them checked out cable connections tried new cable tried the extruder cable on the z drive and the motor works fine swapped the A4988 onto the Z drive and it worked fine checked all voltages on the A4988 and cant find a problem, I set the minimum temperature to 105 degrees and disabled the prevent cold extrude settings in configuration.h but still no movement on any extruders. When I try to move an extruder I hear a faint click and the motor LOCKS but stops there even when the nozel is at 245 degrees.<br />Can someone please help]]></description> <dc:creator>Nigel Kelly</dc:creator> <category>RAMPS Electronics</category> <pubDate>Wed, 11 Oct 2023 14:38:39 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893586,893587#msg-893587</guid> <title>Re: Ramps 1.4 in bq witbox - hotend heizt nach Einschalten sofort auf</title> <link>https://reprap.org/forum/read.php?219,893586,893587#msg-893587</link> <description><![CDATA[ ... stelle die Frage am Besten nochmal im deutschen Forum - [<a href="https://reprap.org/forum/list.php?249" target="_blank" >reprap.org</a>]]]></description> <dc:creator>VDX</dc:creator> <category>RAMPS Electronics</category> <pubDate>Tue, 10 Oct 2023 11:44:07 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893586,893586#msg-893586</guid> <title>Ramps 1.4 in bq witbox - hotend heizt nach Einschalten sofort auf</title> <link>https://reprap.org/forum/read.php?219,893586,893586#msg-893586</link> <description><![CDATA[ Hallo!<br /><br />Ich habe eine bq witbox und bin eigentlich sehr zufrieden damit! Nun musste ich das Ritzel beim Extruder tauschen, wobei es dann an einer wohl im Betrieb durchgescheuerten Stelle an einem Kabel zum hotend einen Kurzschluss gab.<br /><br />Nun tritt der im Betreff geschilderte Fehler auf: gleich nach dem Einschalten des Druckers heitzt das hotend ungeregelt auf. Ich tippe, nachdem ich mich etwas eingelesen habe, auf das "MOSFET".<br /><br />In der bq witbox ist, wenn ich mich nicht irre, ein modifiziertes RAMPS 1.4 verbaut. Leider funktioniert der 1:1 Austausch nicht, da sich der Stromanschluss auf einen von aussen aufgesetzten Stecker ändern würde. Den Platz habe ich nicht! <br /><br />Es können eigentlich nur 2 MOSFETS sein. Eine von den Beiden bei D9, D10, oder?<br /><br />Nun meine Fragen:<br /><br />* Kann mir jemand sagen, welchen der Beiden es genau betrifft<br />* was wären die Spezifikationen von diesem MOSFET. Aus dem was auf dem einen steht, den ich sehe, werde ich nicht schlau. Kann ich später noch hier abschreiben. Wie gross wären die Schwierigkeiten beim Austausch der MOSFETS. Hat jemand vielleichr einen Namen und eine Bezugsquelle? <br />* wenn ich einen kompletten Tausch von Ramps 1.4 auf 1.6 mache - ich würde auch die Treiber tauschen - müsste ich da was in der Programmierung ändern oder genügt es das Ganze einfach nur wieder zusammen zu stecken? Der Stromanschluss sollte beim Ramps 1.6 passen, da Kabel geklemmt. <br /><br />Ich bin eher ein "Mechaniker" als ein "Elektroniker".<br /><br />Vielen Dank für die Hilfe]]></description> <dc:creator>Meinewitbox</dc:creator> <category>RAMPS Electronics</category> <pubDate>Tue, 10 Oct 2023 03:36:13 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893523,893566#msg-893566</guid> <title>Re: Ramps 1.4 bed temp errors</title> <link>https://reprap.org/forum/read.php?219,893523,893566#msg-893566</link> <description><![CDATA[ My bad. Flexible steel plate emissivity caused error, magnetic layer within a degree of optical reading. Sorry...]]></description> <dc:creator>markotime</dc:creator> <category>RAMPS Electronics</category> <pubDate>Sun, 08 Oct 2023 10:36:24 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893523,893523#msg-893523</guid> <title>Ramps 1.4 bed temp errors</title> <link>https://reprap.org/forum/read.php?219,893523,893523#msg-893523</link> <description><![CDATA[ I hate to bring this up, given past articles, but here goes: Upgraded to Marlin 2.1.2.1 (may or may not be significant), also installed magnetic surface with magnetic rubber backing on glass plate, which MAYbe a factor due to higher thermal mass. Error trying to reach 60C on bed, gets to 50, LED goes to flashing rather than constant, then quits. Tried M303 at 50, saved PID parameters, but same problem. Screen reading is 5 or more degrees C LOWER than temp at thermistor (100K, "1"), using optical pyrometer. Which is correct at body temp and at 100C boiling water (I'm at sea level). I've just recompiled using longer timeouts for 2 degree increase (20 seconds to 60), haven't tried it yet.<br />Resistance of thermistor for bed is CORRECT for temps up to 50C, but displayed temp is low by perhaps 5-7 degrees. Thermistor table (1.h) is identical to that of Marlin 1.x which I was using previously.<br />Bottom line, displayed temp is in error relative to resistance of thermistor. I'd greatly appreciate any help / thanks /m]]></description> <dc:creator>markotime</dc:creator> <category>RAMPS Electronics</category> <pubDate>Thu, 05 Oct 2023 14:48:14 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893364,893519#msg-893519</guid> <title>Re: How do I wire external 5v for servo?</title> <link>https://reprap.org/forum/read.php?219,893364,893519#msg-893519</link> <description><![CDATA[ <blockquote class="bbcode"><div><small>Quote<br /></small><strong>Todd900</strong><br />. Do I need any type of current limiting device ,resisters, etc., in between? can I just hook the positive straight up to the vcc jumper pin? Also, where exactly do I hook these up to? Do I put the positive on the VCC and just hook the ground anywhere on the servo pin ground?</div></blockquote><br /><br />Noting inbetween. Positive of the converter just to the sensor; don't connect it to the 5V on the board. Ground can be anywhere; these buck converters have a common ground, so it's the same ground your ramps and atmega uses.<br />Other option is using the output to drive your atmega and ramps; D1 on the ramps has to be removed for this, and i think a connetion heas to be made from atmega's 5 volt out to the atmega 5v in.]]></description> <dc:creator>going-down</dc:creator> <category>RAMPS Electronics</category> <pubDate>Thu, 05 Oct 2023 04:56:34 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893398,893405#msg-893405</guid> <title>Re: Problem using Ramps 1.4 with LabView</title> <link>https://reprap.org/forum/read.php?219,893398,893405#msg-893405</link> <description><![CDATA[ ... so even better! :)-D]]></description> <dc:creator>VDX</dc:creator> <category>RAMPS Electronics</category> <pubDate>Wed, 06 Sep 2023 02:27:29 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893398,893404#msg-893404</guid> <title>Re: Problem using Ramps 1.4 with LabView</title> <link>https://reprap.org/forum/read.php?219,893398,893404#msg-893404</link> <description><![CDATA[ look at official pin names [<a href="https://docs.arduino.cc/hacking/hardware/PinMapping2560" target="_blank" rel="nofollow">docs.arduino.cc</a>]<br /><br />the highest digital pin is 53<br /><br />Digital pins 54-69 where not in the original specification<br /><br />D54 - D69 are A0 to A15 in older implementations.<br /><br /><br /><br />It would seem this is a well known issue [<a href="https://forums.ni.com/t5/LabVIEW-Interface-for-Arduino/How-to-make-all-Arduino-Mega-2560-I-O-pins-available-on-LabVIEW/td-p/3446499" target="_blank" rel="nofollow">forums.ni.com</a>]<br /><br />use them as analog pins. setting values to 0 or 255...]]></description> <dc:creator>Dust</dc:creator> <category>RAMPS Electronics</category> <pubDate>Wed, 06 Sep 2023 02:15:24 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893398,893403#msg-893403</guid> <title>Re: Problem using Ramps 1.4 with LabView</title> <link>https://reprap.org/forum/read.php?219,893398,893403#msg-893403</link> <description><![CDATA[ ... the ArduinoDue has the same pin-layout as the Mega, but needs 3.3V insteaf of 5V.<br /><br />Here a comparison between them - [<a href="https://www.educba.com/arduino-due-vs-mega/" target="_blank" rel="nofollow">www.educba.com</a>]]]></description> <dc:creator>VDX</dc:creator> <category>RAMPS Electronics</category> <pubDate>Wed, 06 Sep 2023 01:41:52 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893398,893400#msg-893400</guid> <title>Re: Problem using Ramps 1.4 with LabView</title> <link>https://reprap.org/forum/read.php?219,893398,893400#msg-893400</link> <description><![CDATA[ I'm sorry I'm not too knowledgeable about Arduino. Can you please explain how that board would solve my problem?]]></description> <dc:creator>AV14</dc:creator> <category>RAMPS Electronics</category> <pubDate>Tue, 05 Sep 2023 14:39:49 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893398,893399#msg-893399</guid> <title>Re: Problem using Ramps 1.4 with LabView</title> <link>https://reprap.org/forum/read.php?219,893398,893399#msg-893399</link> <description><![CDATA[ ... I was using the ArduinoDue (with RADDS boards) -- AFAIK, it could be used with a RAMPS board too, if the boards is modified to 3.3V power support for the Due ... but better check, if true ...]]></description> <dc:creator>VDX</dc:creator> <category>RAMPS Electronics</category> <pubDate>Tue, 05 Sep 2023 14:34:06 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893398,893398#msg-893398</guid> <title>Problem using Ramps 1.4 with LabView</title> <link>https://reprap.org/forum/read.php?219,893398,893398#msg-893398</link> <description><![CDATA[ Hey everyone I have already asked this question on the official NI forum and haven't gotten a reply yet, so I'm posting here to see if someone can help me with this.<br /><br />I want to control Ramps 1.4 and move the X servo motor through LabView using the Hobbyist toolbox but I'm getting the 5005 error stating that Digital input channel 54 is not available as Arduino mega only supports up to channel 53 (see attachment for the error message). Is there any way to solve this problem?]]></description> <dc:creator>AV14</dc:creator> <category>RAMPS Electronics</category> <pubDate>Tue, 05 Sep 2023 14:22:06 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893364,893364#msg-893364</guid> <title>How do I wire external 5v for servo?</title> <link>https://reprap.org/forum/read.php?219,893364,893364#msg-893364</link> <description><![CDATA[ I have a ramps1.4/mega2560 and I have come to the conclusion that my bltouch(generic made by geeetech) is drawing more amps than the mega board can put out because when the probe deploys it makes the LCD flicker and thermistor readings go all over the place. I am going to use a step down converter from a 12v power supply but I don't know how to safely do this. Do I need any type of current limiting device ,resisters, etc., in between? can I just hook the positive straight up to the vcc jumper pin? Also, where exactly do I hook these up to? Do I put the positive on the VCC and just hook the ground anywhere on the servo pin ground?]]></description> <dc:creator>Todd900</dc:creator> <category>RAMPS Electronics</category> <pubDate>Tue, 29 Aug 2023 18:52:09 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893059,893065#msg-893065</guid> <title>Re: hi friends Pin 8 not turn on for heated bed</title> <link>https://reprap.org/forum/read.php?219,893059,893065#msg-893065</link> <description><![CDATA[ There are only a few possibilities<br /><br />blown fuse, dead mosfet or a faulty bed or the bed wiring.<br /><br />I do however see your running marlin 2.0.5 this is very old. released Mar 14, 2020<br /><br />I strongly suggest yo upgrade to marlin 2.1.2.1]]></description> <dc:creator>Dust</dc:creator> <category>RAMPS Electronics</category> <pubDate>Mon, 03 Jul 2023 18:42:05 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893059,893064#msg-893064</guid> <title>Re: hi friends Pin 8 not turn on for heated bed</title> <link>https://reprap.org/forum/read.php?219,893059,893064#msg-893064</link> <description><![CDATA[ Thank you for your reply..<br />You mean these 2 fuses: F2 - F4 ?<br />These two fuses are for short circuit.<br />The board turns on without any problem<br />Only heated bed won't activate and I don't know what others did..<br />I can't think of anything now..<br />And I don't know exactly where the problem is<br /><b>please <b>HELP</b> ...</b>]]></description> <dc:creator>homayuon</dc:creator> <category>RAMPS Electronics</category> <pubDate>Mon, 03 Jul 2023 15:12:28 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893059,893060#msg-893060</guid> <title>Re: hi friends Pin 8 not turn on for heated bed</title> <link>https://reprap.org/forum/read.php?219,893059,893060#msg-893060</link> <description><![CDATA[ [attachment 120402 KFB3.0specification.pdf]<br /><br />D8 is correct<br /><br />It looks like there are two fuses behind the power plug. I would check those have continuity]]></description> <dc:creator>Dust</dc:creator> <category>RAMPS Electronics</category> <pubDate>Sun, 02 Jul 2023 16:48:50 -0400</pubDate> </item> <item> <guid>https://reprap.org/forum/read.php?219,893059,893059#msg-893059</guid> <title>hi friends Pin 8 not turn on for heated bed</title> <link>https://reprap.org/forum/read.php?219,893059,893059#msg-893059</link> <description><![CDATA[ my board is KFB 3.0<br />all is active(endstops - probe z - bed leveling)<br />but heated bed on pin 8 not power<br />This shows the error:<br /><br />start<br />Printer is now online.<br />echo:Marlin 2.0.5<br />echo: Last Updated: 2020-03-14 | Author: (none, default config)<br />echo:Compiled: Jul 2 2023<br />echo: Free Memory: 5587 PlannerBufferBytes: 1136<br />echo:Hardcoded Default Settings Loaded<br />echo: G21 ; Units in mm (mm)<br />echo:; Filament settings: Disabled<br />echo: M200 D1.75<br />echo: M200 D0<br />echo:; Steps per unit:<br />echo: M92 X100.00 Y100.00 Z400.00 E98.20<br />echo:; Maximum feedrates (units/s):<br />echo: M203 X300.00 Y300.00 Z5.00 E25.00<br />echo:; Maximum Acceleration (units/s2):<br />echo: M201 X1000.00 Y1000.00 Z50.00 E10000.00<br />echo:; Acceleration (units/s2): P R T<br />echo: M204 P1500.00 R1500.00 T1500.00<br />echo:; Advanced: B S T J<br />echo: M205 B20000.00 S0.00 T0.00 J0.01<br />echo:; Home offset:<br />echo: M206 X0.00 Y0.00 Z0.00<br />echo:; Auto Bed Leveling:<br />echo: M420 S0 Z0.00<br />echo:; Z-Probe Offset (mm):<br />echo: M851 X10.00 Y10.00 Z0.00<br />Error:Thermal Runaway, system stopped! Heater_ID: bed<br />[ERROR] Error:Thermal Runaway, system stopped! Heater_ID: bed<br /><br />Error:Printer halted. kill() called!<br />[ERROR] Error:Printer halted. kill() called!<br /><br />Guide me<br />thanks]]></description> <dc:creator>homayuon</dc:creator> <category>RAMPS Electronics</category> <pubDate>Sun, 02 Jul 2023 16:11:58 -0400</pubDate> </item> </channel></rss> If you would like to create a banner that links to this page (i.e. this validation result), do the following:
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