Troubleshooting#
The page contains an index of all troubleshooting topics that can be found on this website, as well as some useful links to other sites.
Connectivity#
What if the sender software can’t connect?
Movement issues#
What if the axis moves in the wrong direction?
What if the axis travels the wrong distance?
What if none of the axes move?
What if Y1 and Y2 move in opposite directions?
What if Y1 and Y2 move at different speeds?
Testing limit switches#
How to test the limit switches?
Homing issues#
How to change the homing corner?
Spindle issues#
What if the spindle doesn’t start?
How to configure the VFD spindle speed?
Random glitches#
Random G-code errors? Motors starting or stopping on their own?
You may be experiencing Electromagnetic Interference.
Read more about it here: Electromagnetic Interference
Alarms and errors#
Sienci Labs has a pretty good overview of all possible Grbl alarm and error codes, what causes them, and how to fix them: grbl Alarms & Errors
Z probing issues#
Tool stops before reaching the probe
Tool moves too fast going down