Re: [CAD_CAM_EDM_DRO] High voltage servo controller

Dan Mauch wrote:

>If those are dc servo motors then you could get it to run with Gecko G320's BUT the rapid speeds would be drastically reduced. I am guessing that the orignal machine was capable of 200 IPM with Geckos at 80V you could get 66 IPM. If the machine is for hobby work then that should be fine.
>If you really want performance then look at the Granite servo amps, They will put out 200 volt at 10A. You'll have to slow down the accelration but they really look like nice drives and they work with both AC and DC servo motors see:
>http://www.granitedevices.fi/index.php?q=products
>If the existing servo amps are not shot then you many want to look for something like the pixie boards that will take steps and direction and output a analog signal.
>
>

The other option would be to use the existing servo amps, which are very
likely +/-10V input, and use EMC2 plus a servo I/O board. If an amp
dies, Jon Elson of Pico Systems sells a DC servo amp that does 160V/20A,
and I think he's said that it's possible to increase those specs.

If there may be hardware changes down the road, I'd suggest a Mesa 5i20
card, since it's a reprogammable FPGA and can be used for analog, PWM,
or step/direction drives at your choice.
Here's a list of hardware that's supported by EMC2:
<http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?EMC2_Supported_Hardware>
You can download EMC2 here:
<http://www.linuxcnc.org>

If it's just the control that's shot, replace the control with one that
can use as much of the existing hardware as possible. For a servo
machine (assuming there is already encoder feedback in place), your best
bet is likely to be EMC2.

- Steve