Re: [CAD_CAM_EDM_DRO] Re: deskcnc servo driver

bull2003winkle wrote:

>Keep on asking the questions, that's how one learns. A note about the
>128 count fault limit for the G320's. That's the value I would have
>chosen myself. Most encoders used it this application are about 500
>counts per revolution. If you have 5 pitch ball screws (common) then
>that's about 0.0004" error before it faults, not a problem for most
>folks.
>

Huh? You'd better check your calculations. If the encoder gives 500
counts/rev,
times 5 for the ballscrew, that is 2500 counts/inch, or .0004"/count.
0.0004" x 128 = 0.0512", 51 thousandths. If that happens during multi-axis
cutting, I'm sure a lot of people would notice the error.

Even if you meant 500 cycle/rev on the encoders, giving 2000 counts/rev,
the error would still be 0.0128", which might be a lot, depending on the
work in question.

Jon