Re: [CAD_CAM_EDM_DRO] servo controllers

John,
Any idea when EMC will be able to to do lathe threading?

Shawn

----- Original Message -----
From: "Jon Elson" <elson@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, August 09, 2004 10:08 PM
Subject: Re: [CAD_CAM_EDM_DRO] servo controllers


> J wrote:
>
> >I have gained so much by learning from this group. I have my Taig mill
converted to cnc and working nicely. This is all steppers, though, and I
need to learn a little about servos. I have a Daihatsu lathe at work and
the controller has died. I am interested in trying to use a pc-based
controller to drive the Mitsubishi servo and spindle drives, but I'm not
sure if this is really a good idea. Sorry if this is OT, but I would like
to know what I need and whose websites to visit. What does it really take
to "talk" to an industrial servo controller? Do I need these servo to go
cards I hear about?
> >
> >
> The first thing is to find out how the CNC control sent the
> velocity command to the servo drive. The older ones used
> +/- 10 V analog signals, with the voltage proportional to
> velocity. Some newer drives use digital communications
> protocols, some proprietary (bad news!) and some
> "open" such as CANbus, fieldbus, etc. Some in the
> middle-ages used PWM, some used step-direction.
> If you have drives that accept step/direction signals, then
> you can use almost any PC CNC program. (Not likely
> in major machine tools.) For the many that use analog
> velocity command, the Servo-to-Go can be used with EMC,
> or my Pico Systems PPMC board set can do the same,
> and a little more. One weak spot right now is that EMC
> doesn't do lathe threading, so that could be a major stumbling
> block.
>
> Jon
>
>
>
> 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
>
>
>
>
>