I have recently changed the contoller board on my mini mill to a GRBL 1.1h
It has installed successfully and happily doing what its supposed to be doing.
In my electronic naivety I assumed that the x/y/z limit switch pins would operate when shorted out, but this dosen’t happen. I have the Limit switches wired common and normally closed. Using a continuity tester across the c n/c terminals with the switch lever in the rest position results in no reading (as would be expected) then close the switch lever and continuity is there. But when either the x or travel is set in motion and the limit switch lever closed, nothing happens the axis continue to travel.
Am I missing something?