Re: [CAD_CAM_EDM_DRO] 7 square holes --was,lost post

How do you get a square corner using a round drill? this "method" was
mentioned as one of the first four as I recall.

Smoke

-----Original Message-----
From: Jon Anderson <janders@...>
To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
Date: Wednesday, December 13, 2000 10:24 AM
Subject: Re: [CAD_CAM_EDM_DRO] 7 square holes --was,lost post

>Brian Pitt wrote:
>>
>> yes I'm talking sharp cornered trully square holes
>> or pockets with sharp corners
>
>> any others?
>
>There was an article I just read in a trade mag talking about some of
>the advantages offered by modern controls, both presently realized and
>being developed. One was machining square holes with a triangular tool,
>interpolating the required oscillations....
>I understand the theory, helped by the illustrations. But I have to
>wonder about the horrendous negative rake incurred when the tool is
>coming out of the corner. Neutral rake isn't achieved until the cutting
>edge is halfway along a side.
>
>Jon
>
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