I have recently acquired a CNC router but the edges of cut plastic (acrylic) are not smooth. This only happens on curved shapes. In other words when cutting on the Y axis or the X axis by itself the cut is fine. However when the X and Y axis work together there are bumps on the cut face. Having read the other threads in this section I cant help but wonder if its due the size of the sprokets I have on the rack or the size of the cog I have on the shaft of micro stepper motor. The sytem is rack and pinion and it advances 5 inches per revolution of the motor. What should I ideally have ?
Any help greatly appreciated
Hammersmith