Re: [CAD_CAM_EDM_DRO] Using a CNC Mill to tap holes?

Hi Peter:
The standard way to do this on a machine without rigid tapping (Spindle
orientation and synchronization with Z axis feedrate) is to use some kind of
floating tap holder.
This allows pitch mismatch between the tap and the z axis motion.
Another way is to use a tapping head; this will make its own Z axis motion,
driven by the tap.
Without an encoder on the spindle and a way to tie spindle rotation very
accurately to Z axis motion, you will snap your taps off or chew up the
threads.
The safest way on an uncontrolled machine is to use a tapping head.
Procunier makes some nice ones, so does Tapmatic.

Cheers

Marcus

----- Original Message -----
From: "Peter Homann" <peter.homann@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, May 13, 2002 12:26 AM
Subject: [CAD_CAM_EDM_DRO] Using a CNC Mill to tap holes?


> Hi,
>
> Is it practical to tap holes using a CNC Mill (Taig) by driving the
spindle
> with a stepper motor and holding a standard tap in a collet?
>
> Any advice or information on this subject would be helpful.
>
> Cheers,
>
> Peter Homann
> <mailto:peter.homann@...>
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