Re: [CAD_CAM_EDM_DRO] Servos drivers

John Heritage <john.heritage@...> wrote:

Thanks Ron,

If I am driving the long axis from both sides of the table, and my servos
are only pulling 4 - 5 amps of current each, would I just use one Gecko and
tie both motors to the one amplifier. Or would I need two amplifiers, one
for each servo, and to split the step / direction inputs off to both?

/// Thats a good question, I would tie the two screws together with one belt and then drive it with both motors in parallel or one larger motor mounting between the screws. If you run it that way or a servo on each screw independently you'll definitely have to use a Gecko for each because of the mixed encoder signals coming back to a single drive from two motors (Nightmare, I would think impossible). Sychronization is going to be an issue no matter what method you employ. I'm not sure how the software would deal with such an arrangement. You'd be better off to just find one larger motor for this axis. Hopefully others on the list will offer some input.

////

Also, what does it mean when people talk about the A and B phase outputs of
the encoder? I know this has to do with one rise landing between the rise
and fall of the other phases pulse. Is this to do with how the counting is
handed over between quadrants, or is it a means of increasing the resolution
of the encoder?

//// A and B are the signals that come from the encoder back to the amp. Most encoders have 4 leads: 5v+ , ground(powers up the encoder), A channel and B channel(counts output).

Many thanks,
John

----- Original Message -----
From: "R Rogers"
To:
Sent: Tuesday, November 16, 2004 10:16 PM
Subject: Re: [CAD_CAM_EDM_DRO] Servos drivers



John,

The Gecko 320 is ample and also on sale for $99 each right now. You wont
need step multiplication if you keep the encoder counts below 250
quadrature(1000 counts per revolution of servo). The "US digital" E5S-200
encoder works perfectly with the Gecko 320.

Ron

John Heritage wrote:

Hi,

I am looking at some servos with a peak current demand of less than 5 amps
at 30V.

I was wondering if anyone could give me some advice on which controllers to
look at. I was thinking about using Gecko 320's. What situation would I use
the pulse step multipler in?

Also, are there any other, affordable, options available?

Kind regards,
John

[Non-text portions of this message have been removed]



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@...,
timg@...
Moderator: pentam@... indigo_red@... davemucha@...
[Moderators]
URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO

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


Yahoo! Groups Links









---------------------------------
Do you Yahoo!?
The all-new My Yahoo! - Get yours free!

[Non-text portions of this message have been removed]



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@...,
timg@...
Moderator: pentam@... indigo_red@... davemucha@...
[Moderators]
URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO

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


Yahoo! Groups Links










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@..., timg@...
Moderator: pentam@... indigo_red@... davemucha@... [Moderators]
URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO

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


Yahoo! Groups Links











---------------------------------
Do you Yahoo!?
The all-new My Yahoo! � Get yours free!

[Non-text portions of this message have been removed]