Re: cutter or tooth profile for XL series timing belts/pulleys?

The tooth profile has the different radii on each section depending on
the diameter. a small diameter pulley will have a tigher bend and the
pattern will be slightly different on the next larger diameter.

It does not mean you cannot make your own, it just means there is a
formual for each radius for each pulley diameter.

Dave

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Alan Rothenbush <alan@s...> wrote:
> On Monday 29 August 2005 14:22, lcdpublishing wrote:
>
> > There is another aspect similar to gears too, it has to do with the
> > angle on the sides of each "tooth" so that the teeth on the belt can
> > enter and exit the "tooth slots" in the pulley without rubbing. So,
> > again, the angle on the sides of the "tooth slot" are important.
>
> It seems to me that all of the motion is transmitted by the sides of
the
> "teeth" on the pulley and belt (for XL series anyway).
>
> Therefore, a person could cut properly angled teeth in two passes,
with the
> blank first angled clockwise and offset left just the right amount
to cut the
> left of the tooth (and all the way round to cut the left side of all
the
> teeth) and then angled CCW and offset right an appropriate amount to
cut the
> right side of all the teeth.
>
> The area between the teeth would look a bit like a "W", and a skinny
cutter is
> clearly called for, but so long as the tip of the W is lower than
the tooth
> on the belt (or a third pass taken to clean this up), this would
seem to
> work .. with no fancy cutter required .. just a 1/8" dia. or so endmill.
>
> Am I missing something ?
>
>
> Alan
>
> --
> Alan Rothenbush
> Academic Computing Services
> Simon Fraser University
> Burnaby, B.C., Canada
>
>
> Before me things create were none, save things
> Eternal, and eternal I endure.
> All hope abandon ye who enter here.