Re: [CAD_CAM_EDM_DRO] Belts and Pulleys

Rob, There has been much discussion about reduction when using steppers and it seems the concensus was 1:1 ratio for steppers was the best. No reduction.

Comparing one timing belt to another, SDI or stockdriveproducts "sdp-si.com" has PDF's on their site that compare them all in graphs. The HTD looks like the best belt for high torque application in respect to their size.

I use L series 3/4" width on both of my Bridgeports however according to the aforementioned documents the HTD series are about twice as strong and 2/3 their width. If I read it correctly.

Ron

robsarten <robs@...> wrote:
Hi All,

I'm in the process of CNC'ing a ZX7045 mill and just needing a little
help in working out the pulleys to use for the Z axis.

Have changed to 3/4" .2 ball screws on all axis.

Driving X and Y using servos with a 3:1 ratio.

Have a 1200 oz/in stepper for the Z axis.

What would be a suitable ratio and pulleys "L XL HTD GT2" to use on the
Z axis?

Thanks, Rob





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