Ed Huntress wrote:
"Tim Wescott" wrote in message
...

The new Cox cylinder is for practice. Once I get this one working, and
possibly the TD 09, then I'm planning on building an Owens Mate (see
http://www.modelenginenews.org, look under "projects").

An interesting site. However, I have to comment on something that I keep
seeing in print that has been driving me nuts -- in the first article on
building EDMs, they say it was a Russian invention.

It was not a Russian invention. That baloney was perpetuated by Charmilles
EDM in the early '50s. It actually was invented by the predecessor to the US
company Elox, who sold two of their servo-type
tap-buster/square-hole-cutting eroders to the Soviet government two years
before we entered WWII. The Soviets claim they invented it in the early
years of the war.

Back in '77, when I wrote a lengthy article on EDMs for _American
Machinist_, I studied the history in great detail, and read the translated
papers by the Lazarenkos, who claimed the invention. They added some minor
twists but it was basically the proto-Elox machine.

Just setting the record straight. d8-)

--
Ed Huntress

Send him an email. He's a good guy, and enough of an academic that an
opposing view (particularly if you can back it with citations) will be
meat and drink to him.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html