On Wed, 2008-04-16 at 16:07 -0500, sam sokolik wrote:
> If you actually have access to all 4 coils - then I would use types 9
> or 10.  This would be half stepping and give you 2000 steps per inch.
> (.0005 per step) 200*2*5.
> 
> at a normal base period of 50000 - you could get (without using
> doublestep) 300ipm easy.  Not that your machine would actually do
> that.
> 
> sam

Thanks Sam. I believe my motors have a common on two pairs of coils. I
think like this:

1  C  2
|  |  |
 WW WW

 MM MM
|  |  |
3  C  4

I don't know the options for wiring this configuration, but the Gecko
documentation indicates that you can series or parallel the coils for a
four wire configuration. I get the feeling that currently, my four coils
are driven separately. The plan so far, is to just reproduce the present
wave forms, so I won't need to know what I am doing. I'll just look like
it.

-- 
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/ 
Hardinge HNC lathe,
Bridgeport mill conversion, doing XY now,
Zubal lathe conversion pending
Craftsman AA 109 restoration
Shizuoka ST-N/Bandit CNC)


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