While cutting HDU on a 3D finishing cut I was losing steps. I was using a new Beckwith 1/4" carbide bit. Cut was 1/2" deep with a 10% stepover at 200"/minute. The cut would be fine for quite a while and loose steps causing the cut to be slightly off track.
Other than cleaning the rack and pinion and applying fresh grease what might remedy the loss of steps. The is a 10 year old 4g Shopbot benchtop. I have recently made cuts that are much more stress on a cut than cutting HDU. I also did a USB port test with the Shopbot utility, the rate was 76.5%.
The machine has not been used heavily over the 10 years.
Thanks,
Phil