Re: [CAD_CAM_EDM_DRO] Re: BP retrofit yaxis drive burnup- follow-up

cnc_4_me wrote:

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>>>--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...>
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>wrote:
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>>>>(My PWM servo amps have a fairly expensive 2.2 uF film capacitor
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>in
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>>>>parallel with
>>>>the internal electrolytic cap for exactly this reason.)
>>>>
>>>>Jon
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>>>Good trick, Have you performed any tests to determine how far your
>>>power supply can be from your servo amps.
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>>Probably 1000 feet, as long as you use heavy enough wire so the
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>voltage
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>>drop is not excessive. I also have a power ramp-up module that cuts
>>power to the servo amps when you hit estop, and ramps the DC voltage
>>up slowly (1/4 second or so) when you come out of estop.
>>
>>Jon
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>I had to read this 3 times to be sure you were not kidding. One word.
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Well, I was kidding, a bit. But, what I'm saying here is that the servo
amp has
enough capacitance on board that it doesn't depend on any external
capacitors.
it also has an output filter so the motor wires don't need to be
shielded. All this
increases the size and cost of the amp, but I want to do it RIGHT. If
it prices
the product out of the market, then I won't market it. But, I won't
market a
stripped-down product.

Jon