The hotend wasn't clogged. I could push filament through by hand. After a couple dozen extrusion tests, I changed the way that I was adjusting the filament tension. Now when I load the filament, I adjust the tension to the point that it stalls the motor. Then I back off one or two turns of an M3 screw. I've done tests at 220, 205, and 195. I'm getting within a mm of 100mm when I do an extrusion tby johnkmitchell911 - Reprappers
Dust, The main board works. I was able to heat the hotend and control one axis at a time until I replaced two of the drivers. No, just the E0, X, and Z drivers were affected. I believe that you are right, though, that I sent 12v to something that can't handle it. Do you know if a schematic for the drivers exists?by johnkmitchell911 - RAMPS Electronics
So I dropped a heat sink onto the stepper driver. The event caused the board and my laptop to shutdown. Now the stepper driver isn't working along with two others on the board. I'm using the megatronics 2.0 and Pololu A4988 drivers from sainsmart. To be specific, I dropped the heat sink that came with the drivers onto the E0 driver. After I recovered from the shutdown, X and Z axis would not resby johnkmitchell911 - RAMPS Electronics
So I got my reprap up and running. I am using a direct drive setup. I calibrated the extrusion rate with a starting value of 250 and found that 245 would extrude 98 to 101 mm when told to extrude 100. That was yesterday. Today I seem to be getting all kinds of weird extrusion rates. With tension, temperature, and e-step settings the same, I tell the printer to extrude 100 mm, and I have gotten vaby johnkmitchell911 - Reprappers
It seems that I've fixed the error. I believe I forgot to invert the endstop back from when I was testing earlier.by johnkmitchell911 - Reprappers
Steve, That did seem to make the problem better, but for some reason my printer is moving up when I tell it to home now. Changing the home dir seems to make the problem worse.by johnkmitchell911 - Reprappers
I'm having an issue homing the Z axis on my printer. The other two axis will home fine. When I turn on the printer, it assumes that it is at 0 on the Z axis. I can move the axis up and down but not below that arbitrary 0 point. When I home the Z axis, the motors hum for a second but don't turn. I've attached the config.h file. Thank you.by johnkmitchell911 - Reprappers
Dyze_Design, thanks for showing me the schematic for the board. I've written an arduino program to turn on certain pins on the board. From this, I learned that the heated bed circuit seems to be fine, but I can only power the board over USB which shouldn't happen when I have the pins on jumper SRC12v closed. I now believe that I've blown the fuse for the main power rail on the board. Setting pinby johnkmitchell911 - General
I have made a few hardware changes over the last few days: replacing the hotend with the E3D V6, replacing the X-carriage. I've also rewired the board to improve cable management. So, I could have done something in all of that to cause a malfunction. I fear that I may have crossed the 12v power wires at some point, providing 12v to ground. I don't know how well protected the board is from such voby johnkmitchell911 - General
I'm using a megatronics 2.0 board with the REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER. Today, I started getting an error when trying to connect to the printer. start echo: External Reset Marlin1.0.2 echo: Last Updated: Jun 27 201620NOV201514:29:43 | Author: (Alex Mitchell, default config) Compiled: Jun 27 2016 echo: Free Memory: 3370 PlannerBufferBytes: 1232 echo: Hardcoded Default Settingsby johnkmitchell911 - General
After showing hidden files and folders, all of those stupid Mac files showed up. I deleted all of those and then had some lcd issues but I got it all sorted out. Marlin compiles on my PC now. Thanks for the help nebbian.by johnkmitchell911 - General
The firmware compiles on the other guys Mac.by johnkmitchell911 - General
I'm building a 3D printer based heavily on the Prusa I3. I'm using the Meagtronics 2.0 board to control it. I know the board worked last week but now it is having problems. I downloaded a new version of marlin and flashed it to the board. From pronterface, I can control the heated bed, but the motors won't move. The lcd screen says that the motor moved, but the printer does nothing. I've attachedby johnkmitchell911 - General
I am working on a research project at my school to build a 3D printer. The printer is basically a Prusa I3. I recently took over the project from someone else. He gave me the Marlin firmware, but it won't compile on my laptop. I'm using Windows 10. The last guy had a Mac. Here's the error message that I get from Arduino. Arduino: 1.6.7 (Windows 10), Board: "Arduino/Genuino Mega or Mega 2560, ATby johnkmitchell911 - General