Joey, Lee is correct that these are 5 threads per inch ball screws. They are also coated. I have the first machine. It was confusing since we tried several setups befor we setled on this one. At 5 threads per inch and micro stepping with stepper motors we still have a resolution of less than .001" wich is just fine for cue work. The trade off for 5 tpi rather than 20 tpi is speed. Plus the ballscrew has alot less resistance to rotate than leadscrews. I have had my machine up to 150 inches per minute and if my computer would have output a faster pulse train I could have gone faster. I however will end up running in rapid around 120 ipm. By the way Joey, wait untill you see the storm. If you guys are impressed with the lighting you will be blown away.
Jim.
