Re: [CAD_CAM_EDM_DRO] Re: Best way to mount Gecko modules ?

Vince,

A grounding rod is often several thousand ohms resistance
in dry soil. Fine for lightning strikes but no good for
a floating neutral.

I have used Copley 412 as my standard drop-in servo amp
for several years. It costs about $300 in small quantities.

When Mariss finishes up the G310 I may switch to that
as my standard servo amp because it will be around
half the cost.

These are full servo amps with torque or velocity control.
They take a plus or minus 10v analog input signal and
are used with a servo controller rather than a stepper
control.

For encoders I recommend U.S. digital E3.
It is about $50. This can be converted from single
ended to differential with a little $12 snap on thing
they sell , or you can make your own easily with an
integrated circuit that costs about a dollar.
I'll help you off list when you
are ready to install some.

Les

Leslie Watts
L M Watts Furniture
Tiger, Georgia USA
http://www.alltel.net/~leswatts/wattsfurniturewp.html
engineering page:
http://www.alltel.net/~leswatts/shop.html
Surplus cnc for sale:
http://www.alltel.net/~leswatts/forsale.html

----- Original Message -----
From: "Vince Negrete" <vnegrete@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, January 21, 2003 11:17 AM
Subject: Re: [CAD_CAM_EDM_DRO] Re: Best way to mount Gecko modules ?


> Very good info Les! Thanks
> Oh man! That 220 must of been 4th of July on your TV. Yikes. But didnt
> your breaker box have a Local grounding rod?
> Oh well, off topic.
> I looked into the Copley's and they want $445 for the ASP-090-36 that was
> recommended to me. But the servo card along with all three of them is
what
> would kill me if I dove that direction. (if my wife didnt do it first)
> So I'm pointing towards G340. I was also wondering if I would see the 60
> amps you mentioned below, also?
> Think you might have a drawing of that Op Amp setup?
>
> Also, one more for you Les: What 500 line Encoder should I use to replace
> the Tach?
>
> Vince