I have all my opto-endstops working... except for one!
The max endstop on my z controller board (v1.2.1) is not working i.e. it never stops the motors. If the opto-endstop is replaced by a known good one it still doesn't work. Even when you just insert and take off the jumper it still doesn't work.
The min works just fine. I was thinking of swapping the chips around to see if its an issue with the z chip firmware but thought it was more likely I would cause more issues with bent pins getting the chips in and out. So I thought I'd try reviewing the electronics in situ first.
Of course I have no idea where to start so I thought I'd cry for help...
HELP!
What should I be looking for? As I've had a few issues with getting the chips properly inserted in the first place could this be an issue with a bent pin on the chip and if so, which pin?