Re: [CAD_CAM_EDM_DRO] Higher voltage servo motors with low volt drivers

Mina, I would suggest doing your homework on what torque you will "Need"
versus what is available.
Do a Yahoo search in our group emails on Torque and Servo and read like
you've never read before. :)
You'll be glad you did. Its ALL there as its been hashed and rehashed many
times over just in the last six months.
I dont think the pro's here wanna go through that debate again... LOL! (do
they???)

I have almost the same config as you except 140v SEM's. I went with G320's
after many months of asking questions.

Its in your best interest also to know what Lock Range is when comparing
Rutex with Gecko.

Maybe the other guys can Enlighten me also since I thought Rutex's reference
to Lock Range is really actually called "Error". Right?
If you exceed that error limit of +/-128 the driver goes into error and
stops. Why set an Error of 30000?
Wouldnt this ruin your Product when you find your 0.010" out of spec and
your machine didnt even think of erroring???
Here is what I'm refering to: http://www.rutex.com/home/servodrv.htm

But Rutex comparisons are impressive... I just think that having 30000
would actually be a disadvantage.. Right?


Vince

----- Original Message -----
From: "illya" <illya@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, September 22, 2003 4:48 AM
Subject: Re: [CAD_CAM_EDM_DRO] Higher voltage servo motors with low volt
drivers


> Hi Mina
> If you want a servo drive which will suit your motor I
> suggest you try www.rutex.com
> I am running larger motors with excellent results.
>
> Illya
>
> ----- Original Message -----
> From: "Mina Aboul Saad" <minaf@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Monday, September 22, 2003 4:55 PM
> Subject: [CAD_CAM_EDM_DRO] Higher voltage servo motors with low volt
drivers
>
>
> > I posted a thread a couple of days ago, indicating my need to change an
> old
> > controller on a medium size bed lathe with a setup of Turbocnc and Gecko
> > 320.
> > Motors are as follows:
> > Servo motors are Siemens with the following specs:
> > - Dc Servo, permanent magnet.
> > - 1.03 kW
> > - 2000 RPM
> > - 176 V
> > - 7.1 A
> > - Max. torque 5 Nm
> > With an optical encoder, +5v and 1024 count/turn.
> >
> > I received a couple of replies one indicating that I would loose a lot
of
> > speed as Gecko's max voltage is 80V, and the other is that I should try
a
> > copley driver.
> > I took a look and Copley drivers, I got a little lost as my Electrical
> > background is not so good, but I think they do not accept Step&Direction
> > from a PC.
> > My question is, if I'm willing to sacrifice the speed, will the Geckos
run
> > my motors, what about the torque??? will I loose a lot of torque???
> > And regarding the current will it be suitable to run 7.1 A with
Geckos???
> >
> > I'm doing this for the first time, so any help is truly appreciated.
> >
> > Mina F.
> >
> >
> >
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> Addresses:
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> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> bill
> List Mom
> List Owner
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>