Re: [CAD_CAM_EDM_DRO] Controlling +/- 10V Servo Amps

Codesuidae wrote:

>Michael Larson wrote:
>
>
>
>>http://www.electrosales.com/warner/New%20Product/tdc.htm
>>There are a couple of those brushless servo amps being sold on ebay.
>>I'd buy them (and a compatible motor) but I have no idea how to get +/-
>>10V out of a pc's parallel port. I'm pretty sold on the pico-systems
>>pulse-width mainboard, and you can get step+direction straight off of
>>parallel port pins- but how would either of those be interfaced to the
>>+/- 10V standard?
>>
>>
>>
>>
>You could probably use the MAX232 or similar RS232 driver to get
>+/-12volts.
>

No, he needs a -10 to +10 V analog signal that is proportional to commanded
velocity. So, if the CNC control needs 50% velocity in the positive
direction,
it would produce +5.00 V.

Jon