[highly]

Thanks for the reply!

I managed to tear down the axis this weekend. The ballscrew came out easier than expected. The BearHug nut that holds the timing pulley to the ballnut, on the other hand, lived up to its name! I finally got it removed and was able to take measurements and verify that I could get a 60-tooth GT2 5mm pitch X 15mm belt width pulley on the screw. I ordered up the 60 tooth for the X and Y screws, belts, and some 20 and 24 tooth pinions for the servos. This will give me options for both 2.5:1 and 3:1 ratios on both axes. I plan to design in enough allowance into the motor adapters to fit from a 20 to a 30 pinion with the same belt (making 2:1, 2.5:1, and 3:1 possible. I hate being backed into a corner by poor choices early on!).

I'm just glad I should be able to fit the ratios I need in the space available.

The servo I am looking at is the Keling KL34-180-90. It is rated at about 14 in-lb continuous @ 90v, so 2.5:1 should get me plenty of torque. They are rated 3200 RPM @ 90v, so depending on the power supply voltage that should get me all the rapid I'd want. Drives will be Geckos unless I can source a 90v supply in which case I will go with Vipers.

As things start coming together I will create a build thread.

Thanks
Todd
"HighlyCaffeinated"