Re: [CAD_CAM_EDM_DRO] Darrell and Mariss: BP 42 motor volts and ???

The Bridgeport stepper power supplies are driven
by a three phase transformer. Each phase of the
transformer drives one axis. the AC output of the
transformer is 65 to 70 Volts AC. Each axis has
its own bridge rectifier. that means there is a
potential of 90 to 98 Volts DC. The actual
voltage to the motor is controlled by a "Saturable
Reactor". (A transformer that has the output
controlled by feeding DC to it and saturating the
magnetic field). The net effect is a very
controlled motor amperage at the cost of a lot of
waste power.
Darrell

----- Original Message -----
From: <ballendo@...>
To: <CAD_CAM_EDM_DRO@egroups.com>
Sent: Tuesday, September 19, 2000 10:37 PM
Subject: [CAD_CAM_EDM_DRO] Darrell and Mariss: BP
42 motor volts and ???


> -------------------------- eGroups
>
> Darrell,
>
> Goin' to the expert for this one. What's the
Axis MOTOR voltage on
> Bridgeport series 1 and series 2 ?
>
> Mariss,
>
> And now a second expert.
> Been learnin' a lot 'bout size 42 motors lately;
Thank You. Like you,
> most of my experience is 23/34.
>
> In an earlier thread I suggested that the BP
motors were probably NOT
> wanting 240V drives and that the 56v
mentioned(in that thread)
> ALREADY took into account some factor of
overvoltage. Since these are
> 42 size, I'm wonderin' if they fall into the
1/4HP is enough,we're
> movin' slow... or maybe I was just PLAIN WRONG?
>
> When Darrell(or someone) answers the above
question, could you
> comment, please.
>
> Ballendo (darn glad to be amongst such learned
fellows)
>
>
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