Re: [CAD_CAM_EDM_DRO] Toothed pully design information needed.

In a message dated 11/10/00 9:38:42 AM Hawaiian Standard Time, KM6VV@...
writes:

<< Bill,

Yes, it would be nice to be able to cut timing belt pulleys. But don't
you use a flycutter for someting like that? I guess it would be useful
to have a program to calculate the pitch dia, blank sizes and all that
stuff. Please advise when you get it working!

Alan

>>

Bill and Alan,

If you folks get the tooth form information needed, you're all set. Just
need a CNC mill to cut the form cutter :) My two cents is to cut the
sprockets from steel, cast iron or maybe brass. I have aluminum sprockets on
my FB-2 and they already show signs of wear since I did not fully enclose the
belt drive.

BTW, see if information on HTD profile belts can be found as I believe the
profile is easier to cut. The teeth are deeper so the sprocket is probably
more forgiving of imperfections of the cut profile etc. Also, since the teeth
are deeper, the belts are less prone to skipping under load.

Peter
THRD, Inc.