Isolation Routing PCBs

[cropwell]

Limit switches?, had same with my home switches recently - turned out the supply to the NPN proximity switches was disconnected and the system failed silent. Bad design that I need to get around to fixing (nothing more fun than stalling your Z axis and bending the limit switch out of the way).

I think I may have found the Limits switch problem, when I put a larger cable chain I did not route the Z axis homes and limits cable properly and it was being pulled along the X axis. .
I am going to remake the bracketry when I get my 3D printer working again (waiting for X axis motor cable). It just seems that disconnects in moving cables are blighting my life at the moment).

I need to get back onto PCB cutting !!!