Re: [CAD_CAM_EDM_DRO] Re: voltage based servo controller ?

turbulatordude wrote:

>That said, is it of any use ?
>
>

Could be. It depends on whether it's defective or not.

>Should I check with the guy to see if he has the matching motor ?
>
>

You shouldn't need a "matching" motor. If you can find the current and
voltage limit, you can find a motor that it's capable of driving (just
like a gecko, but probably with different limits).

>And I guess the most important question of all, is there software that
>will run it on my PC ?
>
>

Sure. You can use EMC2 with PWM output on a parallel port pin (or other
supported I/O card). You'll need a little bit of filtering, a resistor
and capacitor should do it, though you may want to check your parport
output - it may not be symmetric (so it would take a bit of fiddling to
get the filter to decay at the same rate as it charges). You'd have to
have an encoder on the motor, but you can read that in software with
EMC2 as well (within reason - without hardware assist, you'll be limited
to something like 25000-50000 counts/second).

This setup can be mixed with step/dir output, even on the same parallel
port.

There are also servo interface cards ranging in price from around $70 to
$800, which support 3 or 4 axes of PWM or true analog output.

- Steve