Re: rapid G210 'overdrive' rates using logic on header blocks

Hi Doug, Tim and the List,

Adding a "gear box" to the G210 (G201&G901) sounds like a neat idea!
Although it seems it would throw the acceleration tables and rate tables
off! I still haven't figured out how to accommodate different uStep
(1X, 2X, 4X, 5X, 10X) values. It's obvious that the 'X' counts
calculate into the resolution of the stepper, and the rate table, but
what to do about the acceleration? If the table is non-linear, you
can't just "slide up the curve", can you?

Alan KM6VV (in way over his head!)


Doug Fortune wrote:

>
> Tim Goldstein wrote:
>
> > Got to see the Series II Bridgeport I purchased on E-Bay back in September
> > today. It got to the rigging company last Thursday and today is the first
> > chance I had to drive out and take a look. You are right, those finned
> > steppers really are ugly.
>
> Should keep them cool though! Who cares what they look like. Might
> even get to appreciate their Batman/Gothic look !
>
> > Still not quite sure what I am going to do for drives.
> > Don't know if I would be happy with the rapid rates
> > I would get with G2XX drives.
>
> I had asked Mariss before, if a guy could have a 'low drive' ie 1/10 step
> and then shift to 'overdrive' ie 1/1 or 1/2 step by putting logic to his 210
> headers (instead of jumper blocks), but didn't hear back. The software
> guys seem amenable to such a thing (taking just one output pin for 'overdrive').
>
> It seems such an obvious answer to a continual nagging problem
> (of resolution vs rapids).
>
> Doug Fortune
> http://www.cncKITS.com