termine tool length

[vik]

hi
I have little experience with mach3. I like to determine the tool length automatically. I read a few threads and some vb scripts but not with the success I expect. I have the following in mind:
-Moving spindle down in z; -hit some switch; -determine the tool length.
what I did so far:
-I found some input in the Break Out Board which is not used and connected it to a switch.
-when i move the z axis and hit the switch then there is a e stop and I get a correct z value in the DRO but I have to press Reset to continue to work.
-the diagnostic shows input on Input4 and LED is turned on
-If I run one of scripts using G31 then the script runs on a exception (unexpected return from script (Reset))

I understand so far what is happening but how can I make that the switch on x-- on input4 is not going into an e-stop. Can I set some event handler to input4 to handle the switch myself or is there a simpler way.
I am glad to get an answer from somebody fighting with similar problems. thanks

[BR549]

Set your probe function to the port/pin of your switch input. That way the G31 will work with that switch.

Then find one of the MANY Tool length routines posted on here and set it up.

Just a thought, (;-) TP

[vik]

thank you it works. I had to set Probe in Pin and Ports and it worked.