Re: High voltage servo controller

Thanks guys,
I just took a look at the machine and expect to make an offer, so I
do not know if the servo amps are in working condition or shot, but I
am trying to make a decison on a worst case.
I am looking to use the machine for some serious work, it's hardly
the size of a hobby machine.
What about Rutex drives, are they any good I hear they have a 200V
40A servo drives?
I am almost sure that the servo motors come with resolvers not
encoders.

Thanks for the info

Mina
--- In CAD_CAM_EDM_DRO@yahoogroups.com, Stephen Wille Padnos
<spadnos@...> wrote:

>
> 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
>