Hi 109jb
i have a similar machine converted it to cnc about 3 years ago im running 200 in-oz stepper and 1:1ratio they work fine haven't lost any steps yet on a job the z has a 2:1 ratio off the stepper and will drill at an inch a minute with a 3/4" drill in mild steel thats better than i can do by hand
i have actually just started to convert to ball screws the 3 thou backlash just suckes hope this helps
cheers
peter |