On Tue, 2007-10-23 at 11:21 -0700, Peter C. Wallace wrote:
> On Mon, 22 Oct 2007, Kirk Wallace wrote:
>
> > Date: Mon, 22 Oct 2007 13:43:07 -0700
> > From: Kirk Wallace <[EMAIL PROTECTED]>
... snip
> > I have a Pacific Scientific R46GENA DC brushless servo motor that I
> > would like to use for my Bridgeport conversion, so I am looking for a
> > amp/driver to drive it.
... snip
> We have an amplifier coming out in a couple of months that _may_ be suitable
>
> Its 30A Peak current, sine wave drive, hall effect current feedback, FOC, 16A
> RMS/Phase continuous, 320V nominal DC bus supply (400V Max).
That sounds like a good match, so far.
> It is an open frame device mounted to an L shaped aluminum "chassis" (you
> supply heatsink) It also needs an external DC bus supply (not AC in)
>
> It is just a dumb amplifier designed to work with a high speed serial RS-422
> link (5 Mbps), host sends 4 byte packets with header, phase-angle, current,
> CS/CRC, and amplifier responds with status/bus voltage/temperature, etc.
> By dumb I mean it has no position feedback, no PID loop, just PI loops for
> current control.
>
> We will eventually have a separate controller card with analog,
> step/direction, and high speed serial PVT inputs, plus quadrature and Hall
> effect inputs from the motor/encoder.
>
> We expect the amplifier to sell for around $199, and the controller around
> $49.00, but then again its our first venture above 200V PWM amps so it might
> explode in our faces....
>
> Peter Wallace
> Mesa Electronics
>
> (\__/)
> (='.'=) This is Bunny. Copy and paste bunny into your
> (")_(") signature to help him gain world domination.
For the Bridgeport, I think I'll take Jon's advise and try to use my 1kw
Sanyo servos and Rutex drives, unless after testing they don't pan out.
On the other hand, my PacSci's aren't of much use without drivers so
I'll be watching for your new drive. If by chance you need a motor to
test with, I could send you mine. Or even better, I could help you with
testing here. Did I mention my middle name was Tillie?
Will I need a controller card for each amp? Do you have more information
on your website?
--
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/
Hardinge HNC lathe
Bridgeport mill conversion pending
Zubal lathe conversion pending)
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