Homing Z wants to home X first.

My machine has one stepper per axis. The Y axis is driven by dual lead screws connected by a belt to a single stepper. I think XYZ is appropriate for my setup.
Thanks again.

You can not have a homing sequence of -1 for the Z axis if it has just one motor, that is for gantry type machines that use two separate motors for the same axis, as Rod mentioned.
For any normal machine with 3 axis and 3 motors ( or Joints as refered to in the 2.8 version of Linuxcnc ) it is mandatory to have the Z axis home first ( home_sequence = 0 ) and the other 2 axis ( X and Y ) can be both set to 1 or 2 or as you see fit.
This is to avoid moving the X and Y axis while the Z axis is low and could hit something.

I have confirmed that this works well. Setting the homing sequence to Z=0, Y=1, X=2 works for my setup. The online documentation still says that to stop an axis from participating in homing it should have a negative sequence. I suppose this will be updated whenever the current master branch is officially released.

allistar wrote: I have confirmed that this works well. Setting the homing sequence to Z=0, Y=1, X=2 works for my setup. The online documentation still says that to stop an axis from participating in homing it should have a negative sequence. I suppose this will be updated whenever the current master branch is officially released.

I'm sure you are reading the wrong docs. Here are the correct docs for homing linuxcnc.org/docs/devel/html/config/ini-....html#_home_sequence

Be sure you follow the link from the main linuxcnc page and select the correct branch for master. note the .../docs/devel/... in the URL above

Homesequenz -1 is not auto home

Please why Z no Home switch and the others do have
you can put all home reference switches to one pin
and the Z is the first you need to home as it gets the tool FREE

Thanks for the reply.
My machine has no Z limit or home switch because I don't think it needs one and it'll be time consuming to install. The solution I have with the homing sequence of Z set to 0 works well for me. My process after turning the machine on is to always rehome. I used to do Z last by hand but now I'll do it first.