Re: Treadmill motors as Servos

Hi Les,

I,ve got two of them on hand and they both work well.
I've looked at encoders from here,

http://www.usdigital.com/products/rotary-kit-encoders.shtml

Is there any advantage to using these over the others?

What about the gearing reduction, How did you do it?
Timing belts?

I see from the old posts that you've been at this for a long
time and I want you to know that I greatly respect your advice.

I don't want to push my luck with the questions, though, I'm trying
to do it in the open for anyone else who may be follwing along.

Thank you again,

John



--- In CAD_CAM_EDM_DRO@yahoogroups.com, Leslie Newell <lesnewell@...>
wrote:

>
> Hi John,
>
> If they run smoothly in both directions then you are on to a winner. I
> know these motors are cheaply made but they work surprisingly well. My
> lathe has proper brushed servos on it and I can't say I have noticed

any

> real difference in performance.
>
> As you are using a fairly low resolution encoder you don't need a step
> multiplier. With a 200 line encoder you will have a top speed of 1875
> RPM at 25kHz. If you need more speed, Mach will go up to 45kHz.
>
> Les