Reply To: FIRMWARE for single layer PCB problem

Angel LM

    Hi Mohamed!

    Sorry, I have been busy these weeks and I just read your question.

    I think that the problem could be related with the homing process. As you don’t have sensors to home the motors, GRBL doesn’t have a reference to start the motion. I think you can do a manual homing by placing the robot in the fully stretched upward position and sending the “Kill alarm lock” command ($X).

    Here you have the documentation of GRBL commands in case you need it: