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Thanks Rod I had seen your post on that subject earlier.
Now I have been banging my head on setting up NPN NC induct prox switches and one of my concerns is that maybe the parport is faulty or not configured right.
The par port tester in the wiki is broken page 404 not found for the files.
Fortunately I found Big John T's file and script here.
forum.linuxcnc.org/18-computer/4743-parallel-port-tester#4743

Hi,

I will check this afternoon. But since it's working after the second call at the same line, I doubt. I edit my first post to be more clear on the test I did.

I think we have all gone off track with how this should work.
Please refer to the template source code
github.com/LinuxCNC/linuxcnc/blob/master...s/homecomp.comp#L257Note that there is a condition here that decides if this joint should be custom homed or homed normally.
So this pin should be set to 1 if this joint is to be custom homed with setp

But if you look at tangentaudio's code, he (and every body else, me included) uses this pin to trigger homing in cia402 which is wrong!
So we should be creating a new pin start-homing to trigger the cic402.n.home pin.

Can you guys review this and see if you agree?