I have just built a cnc and I am doing the initial configuration, setup and testing. I’m using arduino uno and Cnc shield 3. Most things are going fine but I have two outstanding issues. The first one is that my cloned Y axis is cloning steps correctly but not direction. In other words the cloned A axis only moves on one direction. So if I jog in the Y+ direction both sides of the gantry (Y and A) move together as expected. However when I jog in the Y- direction one side returns but the other side keeps moving further in the original + direction causing the gantry to skew.. The jumpers are wired correctly. Any thoughts on what might be happening?
UPDATE: this cloning issue is now resolved it was in retrospect the most obvious problem .. a faulty (homemade) jumper
The second issue is that the z axis limit switches are not being detected by the Universal Gcode sender. (X and Y are fine)..
Any help is much appreciated.