Re: [CAD_CAM_EDM_DRO] Going home

Why not make the home switch adjustable like it is on my mill?

Smoke
-----Original Message-----
From: Ian Wright <Ian@...>
To: CAD_CAM_EDM_DRO@yahoogroups.com <CAD_CAM_EDM_DRO@yahoogroups.com>
Date: Tuesday, March 20, 2001 4:09 PM
Subject: [CAD_CAM_EDM_DRO] Going home

>Hi,
>
>This may sound like a silly question but where on the 'Z' axis would one
>normally put a 'Home' switch? The reason I ask is because, on the little
>mill I am making, the 'Z' axis, like the other two, has about 6" of travel
>but, like the other two, doesn't move very fast (don't know whether this is
>due to the computer, P266, the motors, 5volt steppers run on 35 volts, or
>EMC, but all the axes are really quite pedestrian). I assume it would be
>safest to put the switch at the top of the axis, as far away from the table
>as possible but, if I then have to home all the axes before starting a job,
>this could add quite a bit to the processing time. My other thought would

be

>to put the home about half way up as the chances are that most machining
>will take place near the bottom of the 'Z' travel. What do you think and
>where is the home switch on your mill?
>Another thought is that I am intending to make two or three different

cutter

>heads for different purposes - a high speed spindle for engraving and small
>machining, a bigger one for milling etc. As these will undoubtedly sit at
>different locations on the 'Z' axis travel, is there a way in EMC to
>automatically set different zero positions or would I have to set this up

as

>a whole host of 'tool length' settings? (I assume I am right in thinking
>that you have 'Home' away from the table but Z 0.000 where the tool just
>touches the table?)
>Thanks,
>
>Ian
>--
>Ian W. Wright
>Sheffield UK
>www.iw63.freeserve.co.uk
>
>
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