Re: [CAD_CAM_EDM_DRO] DRO-101: SPC for CNC?
Posted by
Jon Elson
on 2000-09-03 23:17:29 UTC
Tom Simpson wrote:
may not even
be standard asynchronous charaters, but I think most of them are.
My EMC system reads position and changes the commanded velocity to
the servos at 1000 times a second. With such a slow update rate, you
would have to restrict the machine to incredibly low speeds to have any
accuracy at all. It might take 10 seconds to settle at some position,
too.
Jon
> I note that Shars and a few others are now selling inexpensiveIn general, yes. It is a serial data stream, but not RS-232 levels. It
> DRO
> readout scales and such that offer SPC output. Are there any simple
> ways
> to take this output and display it on a PC screen?
may not even
be standard asynchronous charaters, but I think most of them are.
> Further, is there anyNo, the update rate is WAY too slow, a couple of readings per second.
> way to use it to provide data to a PC for CNC operations?
My EMC system reads position and changes the commanded velocity to
the servos at 1000 times a second. With such a slow update rate, you
would have to restrict the machine to incredibly low speeds to have any
accuracy at all. It might take 10 seconds to settle at some position,
too.
Jon