Re: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess ?fixed!

I think the main problem with a UPS is that it's meant for continuous
output, not pulsed current output.

This is why many manufacturers recommend that you not plug laser
printers into a UPS. (they have to heat the fuser from time to time,
and this is done with short current bursts).

- Steve


Keith Clark wrote:

>Thanks, I will just plug the power supply into the wall. I did not
>know what the UPS power supply was doing that might possibly affect
>the axis power supply. That makes it easier anyhow. I wish that
>would fix my speed problem...
>
>Keith
>--- In CAD_CAM_EDM_DRO@yahoogroups.com, Andy Wander <awander@v...>
>wrote:
>
>
>>Not necessarily a problem, just that you will need a pretty big
>>
>>
>UPS to drive
>
>
>>your motors.
>>
>>Also, make sure that your controller power supply can handle being
>>
>>
>powered
>
>
>>by a UPS-most (or at least many) UPS's don't put out a sine wave,
>>
>>
>but rather
>
>
>>a square wave that "equals" the 120VAC sine wave in RMS power.
>>
>>Some equipment will not stand this kind of a power source. Also,
>>
>>
>the square
>
>
>>waves coming out of the UPS will have a large amount of high-
>>
>>
>frequency
>
>
>>energy, which may get through your power supply and into the drive
>>electronics-again, tit is a function of how good the filtering is
>>
>>
>on your
>
>
>>power supply. Most DC supplies are not designed for filtering out
>>
>>
>HF energy,
>
>
>>because the designer plans on having them powered by a pure sine
>>
>>
>wave.
>
>
>>Also, your motor drives may or may not be able to cope with this
>>
>>
>stuff, if
>
>
>>it DOES get through.
>>
>>Finally, I would think that if your spindle drops out due to a
>>
>>
>power
>
>
>>failure, you won't want your axis motors to keep moving. I would
>>
>>
>think in a
>
>
>>power supply situation, you would want everything to STOP.
>>
>>If the spindle was powered by the UPS, then maybe continuing, and
>>
>>
>doing a
>
>
>>manual stop and shutdown would work.
>>
>>Andy Wander
>>Verrex Corporation
>>
>>
>> -----Original Message-----
>>From: Keith Clark [mailto:mail@t...]
>>Sent: Saturday, August 28, 2004 4:08 PM
>>To: CAD_CAM_EDM_DRO@yahoogroups.com
>>Subject: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring
>>
>>
>mess ?fixed!
>
>
>>I figured the power from the wall plug is dirty and if there is a
>>power surge or brief loss of power (which happens all the time to
>>our electrical supply) the drives would continue merrily along.
>>Does that make sense? The drives are powered by a separate
>>powersupply dedicated to them. Do you think there might be a
>>problem with plugging into a a UPS?
>>
>>Keith
>>
>>
>
>
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