Re: [CAD_CAM_EDM_DRO] Re: Servo/Stepper on a Surface Grinder

----- Original Message -----
From: "Sven Peter" <peteryco@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Friday, April 28, 2006 10:18 AM
Subject: [CAD_CAM_EDM_DRO] Re: Servo/Stepper on a Surface Grinder


Hello Friends,
just as a general backfeed about this thread:

At the moment I am converting a german 1957 surface grinder that had
allready Y and Z with simple squirrel cage motors for fast advance to
a fully automatic PLC control.
For 220$ material per axis I changed the fan against alunium ones,
mounted 2 proximity switches little offset that read the position from
the fan's fins. (Z axis 0,00325mm / puls = good enough) And control
the axis by 3 SSR after the contactors.
Best results I had at PWM modulation of 30 Hertz and 25% duty cycle.
The fulltime run at this modulation turned down the speed from 1700
rev to 5,3 rev. My shortest movement is 3° which permits a fully
controled automatic work.
This way I keep the original machine and do not have to invest in new
motors and adapt them. As a gift I have position reading for free.

Regards from under ground.
If somebody is interested in more info please contact me off list,
because the job doesn't permit me much list reading in the moment.
direction: peter.sven"at"gmail.com > substitute "at"by @ by hand to
avoid spam coming from yahoo.

Sven Peter





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








--
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.1.385 / Virus Database: 268.5.1/326 - Release Date: 4/27/06