Post by larrykoskie on Jun 6, 2017 21:12:38 GMT -5
My printer started skipping a step with each layer causing an offset in the print. It doesn't happen on a solid object it only happens when the hotend has to jump over a space like over a horizontal hole to print the other side of the hole. Or if it needs to jump across a space to print another surface on the object. It only skips a step on the Y axis and not the X axis and it only occurs while the bed is moving rearward. So it keeps making an offset the same direction with each new layer. You can hear it skip the step, it sounds like the bed is hitting something, there is a knack as the bed moves rearward. But I have disabled the steppers and it isn't hitting anything. I even took the belt off and the stepper still make the knack sound and skips a step. I have changed stepper motors and changed the stepper driver too, and the problem continues. The only way I have been able to prevent it is to slow the print speed down to 60%. Even at 80% it would skip once in a while, rarely but just one offset in a print ruins it anyway. But running at 60% makes the print take sooooo long. Anyone have a clue what is causing this problem. I added a couple of photos of what some of the prints looked like. The first is a square block with a 16mm horizontal hole. The Y axis would skip when it jumped across the hole. The second is a test pattern that is a flat bar with a square peg at each end. The Y axis had to move from one end to the other to print the square peg and would skip on each layer. It is a little harder to see but it happened on every layer. I can bring my printer this Thursday if someone might wants to see what is happening.