Re: [CAD_CAM_EDM_DRO] timing belt and 2 pulleys

al... thanks for your prompt reply.
My belt deflection is Zero...too tight. maybe I need a longer belt? If so
what length do you recommend?

Robert Williams
(Moreno Valley, CA)

----- Original Message -----
From: "aaalfano" <aaalfano@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, August 31, 2002 10:45 AM
Subject: Re: [CAD_CAM_EDM_DRO] timing belt and 2 pulleys


> Hi Robert,
> The Handbook Of Timing Belts, Chains & Friction Drives from Sterling
> Instrument.
> The belt Deflection should be 1/64" per inch of span. Span Length is your
> distance between centers.
> 1/64 of an inch is 0.015625 Times 42.0156 (if that is your distance
between
> centers?) is 0.6564937 inch
> Deflection at the center point of your 42.0156 distance at 21.0078 inchs,
> should be about 0.6564937 inchs
> using a steel ruler on top the belt, at 21.0078", the deflection should be
> 0.6564937".
> al
> ----- Original Message -----
> From: "res0clvs" <rob.will@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Saturday, August 31, 2002 6:24 AM
> Subject: [CAD_CAM_EDM_DRO] timing belt and 2 pulleys
>
>
> > I used wmberg.com belt length calculator:
> > pitch dia large 5.083
> > pitch dia small 5.083
> > belt length 100
> >
> > The output... center to center distance 42.0156
> >
> > Using Martin 32H100SK pulleys (on shaft with bearings) and a Bando
> 1000H100 Synchro-link belt, the belt is much too tight, so tight must grab
> belt with two hands to rotate pulleys. I read somewhere belt tension
should
> be 5 pounds. Can someone confirm calculations?
> >
> > Robert Williams
> > (Moreno Valley, CA)
> >
> >
>
>
>
>
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