Re: [CAD_CAM_EDM_DRO] HTD belts vs GT2 on Bridgeport

Hi Scott,

Do you have data for the amount of backlash? If you know that you can
work out how much distance error it will introduce. A 72 tooth pulley is
quite large so a small distance on the circumference will equate to a
very small angle. I doubt very much if it will be enough to make a
detectable difference.

Les

Polaraligned wrote:

> I am about to order timing pulleys and belts for my
> BP Series 1 retrofit. I would like to order GT2 belts and
> pulleys, but because of the lack of available sizes for
> the GT2 belts, I have been forced to look at the HTD.
> I have set pulley distances to work with on the machine.
> I can easily find an HTD belt to get my pulley centers
> within .02". GT2 is not even close. Stock Drive Products
> has a poor selection of GT2 belts and I can not locate
> anyone else that has a catalog for these belts. I plan
> on using an 18 tooth driving a 72 tooth for a 4:1 ratio.
>
> Question: I read that backlash on the HTD belts is a
> concern. Has anyone used these belts and had any issues?
> Supposedly, the GT2 backlash at smaller diameters is
> four times less than that of the HTD.
>
> Thanks,
> Scott
>
>
>
>
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