What is a "screw flag". An encoder?


----- Original Message ----
From: Kirk Wallace <[email protected]>
To: Enhanced Machine Controller (EMC) <[email protected]>
Sent: Wed, November 24, 2010 12:33:26 PM
Subject: Re: [Emc-users] OT: leaving stepppers energized but not moving

On Wed, 2010-11-24 at 18:21 +0100, Lars Andersson wrote:
> If the temperature of the motors is acceptable there is nothing else to
> worry about when leaving them on for a long time.
> 

It is kind of a waste of energy. There are other, albeit unlikely,
hazards of leaving a CNC machine energized and unattended (children,
animals, burning bugs in a power supply). I would tend to do a shut
down, if I had a procedure for restarting in the middle of a run. Having
an accurate home (home switch with screw flag, or just hand wheel dials)
also makes it easier to run a series of parts in a jig. Plus you can
brag about it to all of your CNC friends.
-- 
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.wallacecompany.com/E45/index.html
California, USA


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