Re: [CAD_CAM_EDM_DRO] Re: Treadmill motors as Servos

Those pulleys are a lot cheaper than I can get them here in the UK.
Shaftloc or other taper fittings are good. Apart from being a pain to
make, traditional keyways have a tendency to come loose and wear. One
machine I repaired a while back had a key that had worn nearly round.
The keyway was a horrible mess as well.

Have you actually calculated the reduction ratio you need? My mill
worked out 4:1 but your machine may be different. What type of machine
have you got and what materials are you cutting? What is the maximum
rapid speed you want? Also what is your ballscrew pitch?

Les


kz1927 wrote:

> Hi Les,
>
> Your consideration and experience is Greatly simplifying what
> could be an expensive and frustrating, trial & error experience
> for me.
>
> I am as grateful as a person can be.
>
> I'll go with the surpluscenter encoders...they're proven to work
> on your setup. Plus I'll have a few spare motors for (something)?
>
> I'm looking at these pulleys
>
> http://www.sdp-si.com/estore/CoverPg/Shaftloc/HTD5_Pulley.htm
>
> I'd get a 20 and an 80 for 4:1 reduction.
> I think I've got that right.
>
> John
>
>