Re: [CAD_CAM_EDM_DRO] Inserts R US

Sven Peter,

Thanks for being so generous in your posting of your knowledge.

I just yesterday purchased a tool and insert combination to face finish
aluminum disks. It is a VNMG carbide insert, and I am using an MVJNR163D
tool holder, at the advice of a friend. I suppose your comment relates to
the height of the tool in relation to center? This tool holder has a
"negative rake", I think it is called. How do I know just where the tool
should be vertically when turning on a lathe? Should the tool touch the
work exactly at the height of the center of the disk being cut? I suppose
this is elementary, but I hack things out on a taig lathe when I need them,
and I really do not know what is best.
Thanks again.

Tom Eldredge

----- Original Message -----
From: Sven Peter, TAD S.A. <peteryco@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, April 28, 2001 12:10 AM
Subject: Re: [CAD_CAM_EDM_DRO] Inserts R US


Hello Jan,
Befoer you start to use turning or milling inserts it is very
important that you tune up your machine!!!!!!
Adjust the gibs, the nuts and avoid vibrations.
One point many people often do not check is the toolpost or carriage
basement.
Frequently it is worn on the base so that it can tilt and vibrate.
Any vibration will damage your inserts.

Another very important point is: If the insert is only 0.1mm of center it is
in danger.
Specially cut of inserts break their tips easily.
I hope this is a helpful hint.
Sven Peter