RE: [CAD_CAM_EDM_DRO] Re: Safe Spindle Control

Take a look at the BP series II spindle inhibit circuit.

-----Original Message-----
From: Keith Clark [mailto:mail@...]
Sent: Tuesday, January 17, 2006 6:56 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: Safe Spindle Control

> A lot depends on your faith in electronic devices. etc...

> there is a power supply running through your step/direction
>controller (steppers) and a power cord leading to your spindle. tie
>those power lines to a big mushroom emergency switch mounted
>somewhere conviente on your table. this will allow the computer
>systems and peripherials to initialize and talk to each other without
>allowing the power to make it to the buisness end (motors and cutting
>tools).

This is something I have worried about ever since I rebuilt my CNC
Bridgeport. Each time I change a tool, I wonder if the spindle could
somehow start up. Is this really a possibility? The tool change is
usually done during an M6 command and the computer is waiting for
cycle start button to be pushed.

Where would the best place be to place a switch to disable the spindle
motor? I assume it would be on the 3 legs of the 3phase power as it
comes into the motor? There would have to be a second switch for the
AC 110 that would disable the power to the DC powersupply that runs
the stepper motors too. I imagine opening the normally closed switch
during a tool change, then closing it before proceeding. Would I have
to have 2 separate switches or is there a way to use just one?

Thanks guys for bringing this up!

Keith Clark







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