Hi I've had a 4 axis Xylotex on my converted X3 for a number of years now (Version 4) and it has worked faultlesly for all that time, however while it is more than adequate for the XYA axis it has always struggled a bit with the Z even with the assistance of a pair of gas struts either side of the head next to the dovetails, 600mm min. max with a double stack Nema 23. and 2:1 pulley ratio and the motor still sounds like its stuggling. However I've had 3 nema 34's kicking around for some time and have now fitted one of these. So the question now is is it OK to disable the Z axis from the Xylotex, and maybe reassign this to another axis in the future, and use two of the spare pins from the parallel port break out terminal for the other controller, if so which pins would be best to use. The controller is a Motion Controls 7amp unit and the software is linuxCNC. By the way the Xylotex runs the Nema 34 ok but still only gets about 700mm min. max. only to be expected really these motors require 5.2 amps and a a bit more voltage I've gone for about 50volts as aposed to 24 with the Xylotex. But they are great little boards as long as their kept nice and cool with a fan.
Thanks windy