Does anybody have a preference on timing belt materials. I have snapped two belts already on my CADCUT on the X axis because the gantry is so heavy. They were urethane with kevlar cord reinforcement. I just purchased two more that are neoprene with fiberglass cord reinforcement hopefully they will work better. I have my accceleration turned way down in Mach3 to help abrupt stops and I am careful not to get the belt too tight or too loose.
And rather than start a new thread can anyone tell me how to set the clearance on a pinion gear and rack. I have just been bumping my rack to were my pinion has just enough room too move. It would be nice if there was a right way to do it.