Re: Mariss' Surplus Center Motor - Encoders

I had a similar problem, I had 2500 count encoders (10,000 in
quadrature) on a mill with .2 pitch (ok, metric, so not *exactly* .2
pitch) ballscrews. Thus I needed about 50,000 steps per inch, or
100khz pulses for 120ipm rapids.

I talked to Marris and went with the G340 and its internal x2,x5, or
x10 step multiplier. Works like a charm!




--- In CAD_CAM_EDM_DRO@yahoogroups.com, "vrsculptor"
<vrsculptor@h...> wrote:

> > i would be interested to have comments on what count encoder to
> buy , i went
>
> Don,
> Quadurature count is 4 times encoder count = 4 * 500 = 2000 pulses
> per rotation. If your leadscrew is 10 turns per inch this = 10 *

2000

> = 20,000 pulses (steps) per inch. If your motor is reduced 2:1 and
> the encoder is on the motor (the one I'm using) this ups the count

by

> the ratio (20,000 * 2) = 40,000 pulses (steps) per inch.
>
> Mach2 in present form would be hard pressed to make this run much
> more than 60 ips. For me this is OK, its my tool change axis. I'm
> also using a Gecko 340 which will let me divide this count by 2, 5

or

> 10.
>
> Roger