Hi nerd, I did have troubles about 12 months ago with the Gmoccapy "all home" button on a gantry machine but Norbert pushed some fixes very quickly and its worked ever since.
Just check your ini file for this line
Code:
KINEMATICS = trivkins coordinates=YYXZ
if it has "kinstype=both" on it, remove that setting. This will then prevent you from selecting joint mode and leave you with home all, home x, home y and home z buttons. All should work.
Also ensure that your paired joint axes have a negative value for the home sequence. in V 2.8, this will enable the joint axis homing feature
and all other joints have 0 or a positive value for this setting. I found it is wise to have the Z axis set to
so it is the first axis homed to lift the torch up ot of the way before moving the X or Y axis.
Hope that helps.