Thanks unterhaus,
I do not know if I have the ballscrew head. I will need to take off the existing covers and see what it looks like.
When you say 13 tooth pulley, are you referring to the pulley on the ballscrews or the motor shaft? Do you think all three axes have the 13 tooth pulley on them (Ballscrew end)?
The problem with using the existing pulleys would be to get the 2:1 ratio deduction. If the 13 tooth is the smallest pulley (odd size, all I can find is 14 tooth and larger) on the ballscrew, well it would be hard to go with a smaller pulley on the motor shaft for 2:1 ratio reduction.
I am all for trying to use the existing pulleys to save $$$.
I have yet to check out how easy the ballscrew pulleys will come off and be replaced.
Why do you think using the existing steppers would be a better route to go. From everthing I have read on the forums, the Gecko does not work very well with these existing steppers because of the ampager they draw and the stepper motor in general do not have much power under higher speed machining. Am I missing something here? I certainly believe it would be the most cost effective way out, but that would be at a cost of power at higher speeds and smoothness wouldn't it? I also understand that the Gecko fry pretty easy when used with these existing stepper motors. After frying a couple Geckos I would regret not going with another solution.
Pete W.
Bridgeport Boss5 SeriesI Retrofit Started May 2006