After working really smoothly for 1 month, the Y1 stepper motor isn’t working in synch with Y2. The Y2 will move4-5 times before the Y1 will lurch forward or backward an inch or so. It feels like it is wrenching the motor when it does this and I am afraid something will break. I have tightened the eccentric spaces and wheels on that side as it seemed like they were a little loose. I also tightened belts on both sides. Any help will be appreciated.