7i76 using a spindle encoder input for index axis0

No this is a classic lathe with its spindle encoder.

Homing is done with a switch.
To improve the precision, I want to use :
HOME USE_INDEX = YES

How are the axis driven?

Normally step/dir systems dont have encoders or indexes

Normally step / dir systems do not-have encoders or indexes

Yes but I also an encoder output

www.deltaww.com/Products/CategoryListT1....ame=ASDA-B2%20Series

Its possible to use the drives encoder output to get homing on index
but you would require 2 full (A,B,Z) encoder inputs for X and Z

The Hostmot2 hardware has the ability to latch the step count on index,
but this feature has no driver support currently

An idea...

On the drive, I have a OCZ into open collector.

If I do this:

OCZ ---> relay ----> net x-index-enable hm2_5i25.0.7i76.0.0.input-00

What do you think ?

Index-enable is something linuxcnc controls to enable encoder count latching on
index

Indexed homing cannot be done without a full encoder input