RE: [CAD_CAM_EDM_DRO] Question Concerning API CMD-260 Drive Current Setting

Not sure of the exact motors you are using, but if it is the same
Powermax II motors I have on my Sherline than the 2.3 amps is the
setting without any additional reduction if you want the absolute
maximum low end torque. I am running then at 1.75 amps if I remember
correctly as I don't care if I lose some low end torque (I have plenty)
and it keeps everything a little cooler. You could use 1.5 and I bet you
do not see any performance difference. There is no need to run them at
the absolute maximum possible most of the time.

Tim
[Denver CO]

> -----Original Message-----
> From: netman4ds [mailto:netman4ebay@...]
>
>
> I have a question about the appropriate current setting on my API
> CMD-260 bipolar drive. I will be using a Powermax II Bipolar Stepper
> motor which is rated at 2.3Amps per phase when the phases are
> wired in
> series. From data gathered at the API website it appears that the
> proper drive current setting for this motor in a series configuration
> is calculated as: 2.3Amps x 0.707 = 1.63Amps . Therefore, a
> conservative drive current setting of 1.5Amps should be selected. I
> don't know how the API conversion factor of .0707 was derived. If I
> am correct, a dip switch pattern of '10100' should set the drive to
> 1.5 Amps. Is this the correct drive current setting for this motor?
> If not, what would the correct setting be? Any help will be greatly
> appreciated. Thanks - Dan.
>
>
>
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