Tandem Z axis suddenly homing in opposite directions

Check out the docs here
linuxcnc.org/docs/html/config/ini-homing.html#_home_sequence

If I'm reading this right then:
It will home in a order based on the ABSOLUTE value of the sequence numbers.
You can't skip a number.
And tandem pairs should have a negative as Peter pointed out.

I reset the .ini file by hand and put the setting as recommended:

Z joints home sequence = -1
Y joints home sequence = -2
X joint home sequence = 2

restarted LinuxCNC and z travels in opposing directions. I'll try resetting the home travel again to see if that again fixes this albeit temporarily.

*edit* I also start getting the message "cannot jog joint 3 because sequence is syncronized (-1) before homing I've always been able to jog the joints...

Updated ini attached

Hey AgentWD40, good to see you again!

nope, this time when I try that they just switch who homes in the wrong direction for Z.

I think I have gremlins...

"cannot jog joint 3 because sequence is syncronized (-1) before homing I've always been able to jog the joints...

This is a good thing, it means that LinuxCNC has recognized that the z joints are synchronized
and should not be jogged individually. (it also shows that you cannot use -0 as a home sequence number
for synchronized joints)

Do you need to reverse one of the Z joints due to the mechanics?

Bearfood wrote:
Hey AgentWD40, good to see you again!

I'm following your progress with bated breath :laugh:

I think it's time you bring up halscope or halmeter so you can watch what's going on... (Or) You mentioned you checked the switches with a multimeter, have you traced the signal back to the 7i96 to make sure your connections are good? But again, halmeter time.

I can do that if that's your recommendation. The thing I don't understand is that they were working fine in tandem previously without issue and then suddenly started going in opposing directions and I just can't understand why. I'll change the wiring but this is the first time I've touched the wiring since adding the home limits...

Also when I did the +/- in Linuxcnc it was moving in the right direction.