I am new to 3d printing and had bought my first 3d printer a couple of months ago. I have it all put together and the software uploaded to the Arduino. However, I need some help with configuration and calibration of the printer. I understand that there is a configuration file that can be changed and uploaded again the create those changes. I also have worked with Arduino before so I know the IDE.

When I turn the printer on everything works, as far as I know. I did some tests to see if anything was wrong, but I couldn't find anything. However, when I hit home for all of the x, y and z axis to go to their starting marks, it tries to go past the rails and comes apart. From what I understand this is a configuration issue.

I tried to contact HE3D about this, but received no answer, so you guys are my last hope. If you need any more information to help me, let me know and i'll try getting it to you asap. (I also have read the documentation on Repetier and the installation and configuration section but my brain for some reason is not clicking into gear.)

Thanks for the help in advanced!!! Here are the specs: https://www.3dprintersonlinestore.com/reprap-prusa-xi3

  • $\begingroup$ Hello, DakotaMiller, and welcome to 3D printing beta! I'm wondering: which firmware are you using for your printer (you mention Repetier, but I'd just like to confirm this)? Also, have you manually tested your endstops using the M119-gcode? More info: reprap.org/wiki/Endstop $\endgroup$ Mar 19, 2016 at 20:56
  • $\begingroup$ I did not use the code. However i did test it using the repetier host software on the computer by typing in a like 10mm for it to move and pressing the endstops myself. Also it moves away from the endstops when going to home. $\endgroup$ Mar 19, 2016 at 21:33
  • $\begingroup$ The files i used for the frimware and software can be found on the site i mentioned. $\endgroup$ Mar 19, 2016 at 21:39
  • $\begingroup$ If it moves away from the endstops when homing, try flipping the motor plugs where they connect to the mainboard to make them run the opposite way. Then see if it homes properly. $\endgroup$ Mar 19, 2016 at 22:03
  • $\begingroup$ @Ryan I can due that but the circuit diagram say that it needs to be the way I put it together. If I were to flip those would it damage anything? $\endgroup$ Mar 20, 2016 at 2:26

1 Answer 1


Based on some troubleshooting in the question comments, it appears that the issue here is the motors running the wrong way. This can be fixed EITHER by inverting the motor directions in firmware, OR by simply flipping the orientation of the motor plugs where they connect to the controller board. Flipping the plugs is an easy and quick way to reverse the phase of a stepper and thus reverse its direction of motion.


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