Hi I am Paulie from Australia, I have just built my first CNC machine a Workbee 1010 using the Open Builds Black Box controller and Nema 23 Stepper 2.45N.m - High Torque Motors. Everything on X axis works well the same the Z axis when it comes to Y axis driven by the two motors it all goes horribly wrong. If I jog 1mm at a time it copes anything more it jams or moves a bit and appears that one side is either lagging or accelerating and the jams. This is starting to become very frustrating so near but so far. Where I bought the build form here in Australia have suggested. 1.To check machine is square. I have done and it is. 2. That wheels are to tight. I have spent hours adjusting fully on fully off and all points in between, either jams immediately or travels varying degrees of distance before jams again. 3. Check that current setting for both motors are set the same on the Black box controller. Which I believe they are. Counted them down to the minimum setting and back up to the original default setting on the Black Box. I would greatly appreciate any suggestions that might get me through this barrier. Please bare in mind that I am a 60+ woodworking enthusiast, practical but when comes to g-code I have no idea. I have put a video up on you tube to illustrate Thank you.