Re: [CAD_CAM_EDM_DRO] Looking for schemtics for Steepper CNC

In a message dated 16-Oct-01 21:56:38 Central Daylight Time,
Area51tats@... writes:

> I have a bunch of nema 34 sized steppers and I figure one
> of them would be perfect for this. I havent been able to find a schematic
> for
> some thing like this yet and I am hopeing that someone might have seen
>

Gerald: I'm guessing the "buncha NEMA 34 sized steppers" you have are
6-wire. They were not made with the "intent" that they be used as bipolar,
but for just a "fast-traverse" application like you describe, you could use
"four of the six" (if you know what you are doing), and get SOME use of one
of those motors, while perhaps not 100% as efficient as an all-new bipolar of
"same physical size".

Driver? Gecko! There are unipolar drivers available, but, well, I won't go
there (anylonger). The Gecko G210 is "just right" and TINY! If you just
want "rapid stepping", you could cobble a 555 as astable, even with a
"ramping" circuit (see Don Lancaster's "CMOS Cookbook", etc.!).


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