Re: [CAD_CAM_EDM_DRO] Re: Where to set Z=0

Hi Smoke:
You've raised an interesting point regarding where to set the origin in
"Z".
I thought I'd contribute my two cents worth for the sake of those who are
new to this stuff.
I've always followed the policy of setting the highest point on the part or
the fixture as Z=0.
All my Z axis moves into the part are Z negative.
My reason for doing it this way is that it becomes very easy and foolproof
to set clearances for rapid moves without risk of pounding the cutter into
the part.
I've seen a lot of collet chucks and drill chucks melted into an unuseable
mess by having 20 horsepower squash them into a job at 700 IPM because of
incorrectly calculated clearances.
My way, as long as the TLO is set correctly, you can't go too far wrong if
there ain't no minus in front of the "Z" part, so it's really easy to check.
Cheers

Marcus
-----Original Message-----
From: Smoke <smoke@...>
To: CAD_CAM_EDM_DRO@yahoogroups.com <CAD_CAM_EDM_DRO@yahoogroups.com>
Date: Friday, October 26, 2001 8:54 PM
Subject: Re: [CAD_CAM_EDM_DRO] Re: Technique for parting a part


The finished

>surface of the plate is ALWAYS the zero point for the Z axis. This also
>provides a benefit of always working to positive dimensions for the Z axis.
>
>Smoke