homing with Phase Z encoder on MESA 7i96s

my configuration works very well on the x,y,z axes with on/off switches. homming is all done at the same time without any problem. the problem is only on this rotary axis where i have an encoder with which i want to use the Z phase to do my homing.

OK, that's probably to be expected since there does not seem to be any B axis home switch
and you have setup a homing scheme that requires that switch.

If you don't have a home switch on B, and you want to home to index, you need to setup
Index-only homing:

linuxcnc.org/docs/html/config/ini-homing.html#_configuration


 

Yes, that's what I've done. My axis is configured in my .hal & .ini files with Z pulse detection on my rotary axis ( B ), which has no switch. The problem is that I can't detect my Z pulse during homing on this axis ( B ). The hardware tests you made me do comply.
On all my other axes, homing is done correctly (with switches) in accordance with the attached documentation.

Did you set HOME_SEARCH_VEL to 0 as required by Index-only homing?

Otherwise homing B will search for a home switch before searching for index.

linuxcnc.org/docs/html/config/ini-homing.html#_configuration

ok, I understood that, but how will my axis move if I don't give any speed? it will never detect my plus Z. I can't understand the logic ☺

The search velocity is the speed when searching for the first
home switch actuation, the latch velocity is the velocity used
for for the actual homing switch/index move so only the latching
velocity is needed in this case.

Basically, Index-only homing is specified by setting the search
velocity to 0. (as the homing documentation specifies)