Re: [CAD_CAM_EDM_DRO] update on HELP

Dave,

No, a tach is not an encoder. It is basicly just a DC
generator and in your case, it generates 14VDC at
1000 RPM, 28VDC at 2000 RPM etc. If you wanted
to use Gecko 320 or 340 drives, you would need an
encoder on the back of the motors. Geckos do not
use tach's. so that would just be left unconnected.
The tach's are used on a true analog servo system
and would be connected to the servo amps for
velocity information while the encoder would go to the
computer. In the case of the Gecko drive the encoder
will connect directly to the drive, and EMC will spit out
step and direction pulses just like a stepper system.

What may cause a problem is this.

Arc initiation - may cause severe interference and incompatibility with
computerized machines. You must use a torch with a "solenoid" arc starting
mechanism (also called "contact" start, not to be confused with dragable
tips). Do not use torches based on "high voltage/high frequency" or
"capacitive" arc starting mechanisms.

That came from http://www.plasmacam.com/torch.htm

I have no experience with plasma torches so I defer that to
someone with some knowledge of them to comment.

Bill

----- Original Message -----
From: <dlantz@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, December 13, 2001 11:58 AM
Subject: [CAD_CAM_EDM_DRO] update on HELP


> it's Dave L. again. I have more information on the servo:
>
> its a:
>
> Dynetic Systems
> D.C. servo motor with tach
> Model No. 22134B
> rated at 70.0 Volts, 1.70 amps
>
> generator volt grad: 14.0 D.C.V/KRPM
>
> i tried getting info from the web site, but was unsuccessful, requested a
> catalog...
> I'm not sure what 'generator volt grad' means, is this an encoder? there
is
> another shaft at the end of the motor i could attach a quadriture (but
> spelled right) encoder to. and then build a box with gecko's in it for the
> two axis's (whats the plural of that?) then i could have a box that would
> allow me to switch just to dc motor back and forth from the optical tracer
> and the gecko box/computer,
> thoughts anyone?
> thanks in advance, Dave L.
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>
> Post messages: CAD_CAM_EDM_DRO@yahoogroups.com
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...
> Moderator: jmelson@... timg@... [Moderator]
> URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> bill,
> List Manager
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>