Where's the spark ??
Ed Huntress wrote:
"Paul Victor Birke" wrote in message
...
Not sure things can't be done other ways but years ago one of my manu.
engineers cut a magnet with it into some unusual shape I wanted at the
time. So operations on magnets are gentle so as not to cause
demagnetization.
Slow but smooth!
Cutting magnets was an early production use for EDM. Before digital watches,
Timex cut the little kidney-shaped alnico magnets for their electronic
watches on an Eltee-Pulsitron ram-type EDM. The electrodes were pieces of
copper tubing squashed into the kidney shape and plunged straight into the
alnico. They ganged something like 30 or 40 electrodes into a tool block.
Ed Huntress
Kewl !!
thanks Ed
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