Re: HTD belts and pulleys: transmission

Hello.

Thanks. I was also thinking yesterday in Oldham couplings. Seems to
me a interesting coupling solution. But belts&pulleys are very
interesting, for example, with couplings the stepper motor seems very
far from the machine, if you do not cut some of the axis. Not only
cosmetic factor, as the machine can suffer more.

Some experiences with Oldham or you consider that is not a good
solution in CNC coupling?

Regards,

Salvador.

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Leslie M. Watts"
<leswatts@a...> wrote:

> Hey Tim
>
> You are quite correct.
> I plead guilty to trying to design the bestest, most accurate,
> cheapest, biggest machines around.
> A good case in point is my using a machine mapped out to
> +/- 0.0005" (25 degrees c) to cut wood.
> But it did come in handy to make precision parts for
> encoder prototypes....
>
> As for GT vs XL and L my opinion comes from some meetings and
> tests with Gates application engineers. I was pretty convinced from
> those that GT is a bit better for not much more in price.
>
> Suprisingly I found that the newer GTII was not as good!
>
> All will work and are used in cnc apps of course.
>
>
> Les
>
> Leslie M.Watts
> L M Watts Furniture
> Tiger Georgia USA
> http://home.alltel.net/leswatts/wf.html
> Engineering page:
> http://home.alltel.net/leswatts/shop.html
> CNC surplus for sale:
> http://home.alltel.net/leswatts/forsale.html
> CNC carved signs:
> http://home.alltel.net/leswatts/signwp.html
>
>
>
>
> -----Original Message-----
> From: Tim Goldstein [mailto:timg@k...]
> Sent: Friday, September 05, 2003 4:32 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: RE: [CAD_CAM_EDM_DRO] HTD belts and pulleys: transmission
>
>
> > -----Original Message-----
> > Hi Salvador
> >
> > If you decide to use timing belts I would suggest
> > Gates GT type. They have about the best registration accuracy.
>
> Remember, while it is true in the bigger, better, faster, more

power, my

> dad can whoop your dad ego building manner that us men approach

things,

> that the HD and GT series belts do have better specs in regards to
> registration accuracy, there have been a lot of machines built over

the

> years and still running that use the XL and L series belts. While

the

> tendency is to want to over build and over spec everything on a

machine

> the results will not be based on the best component you put in the
> system, but the worst. With all the possible places to have losses

of

> accuracy the difference between the older trapezoidal shape belts

and

> the newer rounded tooth belts are probably not the major factor in

most

> of our machines.
>
> Tim
> [Denver, CO]
> Beat the Sherline Oct 1 price increase. Order Now!
>
> Sherline & Taig products at Deep Discount
> Mach1 & DeskCNC with credit card ordering
> www.KTMarketing.com/Sherline
> e-mail me at Timg @ KTMarketing.com for items not yet listed
>
>
>
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