Re: Calculations for XL 037 pullies and cutters

--- In CAD_CAM_EDM_DRO@y..., Alan Marconett KM6VV <KM6VV@a...> wrote:

> Hi John S.,
>
> Yes, I think I see this now. Turn blank dia to OD, cutter tip
>starts
> out on OD, and cuts in by the infeed distance. The cutter has a
> specified tip width and the flanks of the tool are at a specified
> angle. "FLY" across the edge of the timing belt pulley, then
>repeat
> for each of the tooth locations. That's it?
>
> Thanks for the help!
>
> Alan KM6VV

Yup, that's all there is to it. I've been saying it's easy.

Have fun.

John S.

>
>
> machines@n... wrote:
> >
> > The XL range of pullies all have a pitch of 0.200"
> > The included angle of the cutter is 50 degrees and the width of

the

> > cutter at the tip is 0.052"
> > This can be ground up like a fly cutter and that's all the cutter
> > information you need.
> >
> > The pitch circle diameter of the pulley is found by multipling the
> > number of teeth by the pitch and dividing the total by Pi.
> > Example shown for 30 Tooth pulley:-
> > [30 * 0.200] = 6 / 3.1412 = 1.910" dia
> >
> > Outside diameter is found by subtracting a constant K from the

PCD.

> > Same example again:-
> > 1.910 - 0.020 = 1.890" dia
> > The constant K is 0.020 for the whole of the XL range.
> >
> > Last piece of information needed is the depth of the cutter

infeed.

> > Again this is constant throughout the XL range at 0.065" deep.
> >
> > If anybody want's any more details for other tooth forms like MP,

l

> > or H series than have a look in the files section for a file

called

> > pulley.jpg or go to this link:-
> > http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/Pulley.jpg
> > All the other detail are shown there. The constant K id in column

J

> >
> > John S.