Re: [CAD_CAM_EDM_DRO] Belts & Pulleys

> Jason Cox wrote:
>
> > Hello,
> >
> > Do belt & pulley drives introduce backlach into a cnc setup? After looking at many belt/pulley sites I have noticed they quote their products to be low backlash, how low is low?

The key is that they make the cog on the belt a little bit wider than the gap between
teeth in the sprocket. If you need it tight, you apply a lot of belt tension, and the rubber
cog is forced down into the gap. Eventually the cog wears down a bit, and a tight
fit can no longer be maintained. Then the belt will creep over the sprockets with
a definite creaking sound. In accurate positioning systems, that is your cue to replace
the belts.

Jon