Help with tandem axis Y

Have you tried combining X and Y home switches on one input, and Z and Y2 home switches on another?

that never cross my mind, did not think that was possible and then i  can just assign limit switches on pncconfig? i can sure try that. is that how you have yours?

No, I have a 7i76e with lots of inputs. I used to have a machine run off a parallel port, though, which has very few inputs.

tommylight wrote:

1. with only one switch, forget Y2 and tandem, it does not work.
2. you can use a single switch for both Y sides, but only as a single Y axis/joint, just choose Y step and Y dir for both stepgens (1 and 2 as far as i can se in your ini)
3. LinuxCNC can do multiple switches for a single input, must be normally closed, though
4. For tandem axis/joints with separate switches on both Y you would need 2 inputs as Y and Y2 can not be on the same input, so 2 inputs for 4 or more switches.
5. point 4 above works perfectly fine as i have some machines set up like that with parallel port, and can do gantry squaring.

Is that what you meant Tommy? use my limit switch from Z with Y and limit switch from X with Y2?

Yes.
Or any other combination, except tandem joints can not be on the same pin, so you can have XYZ on 1 pin and the Y2 on the 2 pin.
Check point 2 for you situation.

Thank you Tommy and Djdelorie, i appreciate your help so far, i had a few minutes and disconnected probe and assign individual pins and did not work but i did not have much time and I will be away form the shop probably till Tuesday (which sucks because i want to convert this machine so bad) but i like the idea of only using 2 pins this way ill end up opening one output. and ill get back here to report how ever i did not find the option of assigning multiple stepgens to one pin so i assume it will have to be done in .hal and .ini??!! ill include those once i try (if i get a chance ill sneak in the shop on Sunday (fiancé permitting lol)

thank you again for the help