CNC router occasionally makes jarring noise and home jumps when it does this. Help!!

[george uk]

Hi

My friend had a similar problem a few years ago, after a lot of messing about, we found a few important but simple things helped out.

1. Check your parallel cable, and both connections, ( someone on here already mentioned it ),
2. Try not to cross any of the cables for the axis, especially with the spindle cable and keep them away from estop cables. but try rout them away from each other, or at least insulate them a bit.

The version of Mach your using, did it come with the machine

3. Some of the Chinese suppliers send out hacked versions of mach ( can not remember the build number ), and its full of bugs,

2 years ago, when dealing with a problem on my friends machine, the hacked version of mach was buggy on the axis drives and spindle speed setup for slow spindle rates.

edit. just looked at your wireing again, you have 3 axis power cables running very close to your other wires, If your Y axis driver is the one on the right side, i would route them power cables elsware, or at least dont let them get close.