I have been building my Workbee 1510 plus. I finally got everything together. I actually tried driving all three axis before and all went well. However I had to replace the Z axis motor, my fault. After replacing the Z stepper motor on Thursday, I heard a clicking sound from the steppers. The carriage would sometimes move and sometimes not when I issued a move command. Not sure if I had fried the controller, I used a bench power supply to see if it might be the power supply. When I took the cover off of the controller I saw that the lights would flash on and off with the old supply. I tried to measure the voltage with a digital meter. The voltage wasn't even there long enough to get sample. Everything worked with the bench power supply. I am chalking it up to infant mortality since I only has at most a hour or so on the supply. This may help someone in the future if they have the same symptoms