Hi Piertoine, i have installed a PLC4x-G2 BOB and a PLCM-E3 motion controller. i don't think the axes can be slaved through hardware. i have slaved axes using Mach. I had great help from Jazz with setting this up. i'm still trying to configure the spindle control from MACH and i have an issue with the on board relays but Jazz is helping me with this also. i don't have a fourth axis setup but would like one when i get to grips with the standard X,Y,Z, functionality . i tried to join the purelogic forum but haven't had clearance yet.