Re: [CAD_CAM_EDM_DRO] home switch vs limit switch

Hi, well good question. a home switch is where you send the machine to find
this switch, and that gives you a known location to start from.
a limit switch tells your controller the axis is gone as far as you want. It
may also make the controller do "emergency Stop", or simply prevent the axis
from mooving any further in that direction. there are many diffferent ways
that a limit switch is used. Most common is to prevent an axis from running
into something such as the end of the screw,frame of machine,or maybe just
save travel time on that axis. good example is a surface grinder, you set
the limit so the wheel just clears the part instead of moving the axis full
length back and forth...some grinders have very long tables. one i used to
run had a 8 foot table but most of the parts they ground were less than 2
feet long. the limit switch saved the table from mooving 12 feet on every
pass of the grind, a considerable savings of time..cul brian f.

----- Original Message -----
From: "andrewyslee" <andrewlee@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Friday, June 14, 2002 11:45 PM
Subject: [CAD_CAM_EDM_DRO] home switch vs limit switch


> Hi all,
>
> Sorry if this is a baby question, but everyone got to learn right?
>
> what is the difference between a home switch and a limit switch?
>
> thanks
>
>
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>
> 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 as 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.
>
>
>
> 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 group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> bill,
> List Mom
> List Owner
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>