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

Jon Elson 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?
>>
>>
>>
>That would be tough. That's why I also have the PPMC, an analog servo
>interface for the parallel port. See
>http://jelinux.pico-systems.com/PPMC.html
>for more info. Unfortunately, due to its modular nature, it is a bit
>more expensive
>than the PWM and stepper controllers.
>
>It actually would be possible to make a PWM to analog 10 V converter,
>but the number
>of people who would want such a thing would be limited.
>
>
>
>>
>>
>>
>>
>Jon
>

Thanks. I just got two really nice DC brush-type motors on ebay, so
this is less of an issue all of a sudden. I just need one more for the
spindle, and considering these compications it'll probably be DC brush too.
Michael