Re: Making Stepper Pullys

>--- In CAD_CAM_EDM_DRO@y..., "Ian Wright" <Ian@i...> wrote:
> Hi John,
>
> The belts I have are marked ISORAN and look like the ones on P95 of
>the
> current catalogue - trapezoid form teeth. It is possible that the
>pulleys
> were cut with a form tool but when I took 'em apart and laid a 2mm
>drill in
> the spaces, I couldn't see any gap around it under 50x
>magnification - so I
> made my pulleys by drilling holes and cutting a chunk away. I also
>noticed
> that the edge finish on the commercial pulleys was a bit variable
>which is
> why I assumed they had probably been barrelled to break the sharp
>corners. I
> may be wrong but it seems to work - I'm not saying, of course, that
>the
> technique will necessarily scale up well but it certainly seems to
>work with
> the 2.5mm pitch belts I have.
>

Ian
OK got that and looked in the book. It does give a definite angle
though on these belts of 40 degrees and doesn't show a true radius at
all. I thought you were on about the HTD type on P 104 which have a
true radius. I wonder if they sent you the correct pulley's for the
belt type ?

John S.