Subject: Anyone built EDM from HSM plans ?

From: [email-masked] (chris castle)
Date: Tue, 23 Apr 1996 03:04:53 GMT

Hi ....I was wondering if anyone has built the EDM that has 
been going for the last year.
Chris

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From: [email-masked]
Date: Tue, 23 Apr 1996 22:45:19 GMT

[email-masked] (Jonathan M. Elson) wrote:

>chris castle ([email-masked]) wrote:

>: Hi ....I was wondering if anyone has built the EDM that has 
>: been going for the last year.

>Anyway, I think that his design is a bit too complicated, and can be put
>together with a more general CNC system fairly easily.  I sure would
>like to see what others are doing with it.

>I looked at a few EDM machines at an auction here a few weeks ago.  They
>were awfully simple looking!

I agree with both of the above, I built a simple version of the
original EDM shown in HSM (several years ago) that uses a relaxation
oscillator (which consists of two lightbulbs, the capacitor, and the
arc gap) and manual control. A  fun little device, and very simple.

When I get the time, (yea right)  I am planning on building a proper
one, with pulse controls, and an x-y feed..

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From: [email-masked] (Jonathan M. Elson)
Date: 23 Apr 1996 19:14:54 GMT

I have been following this for a while.  Since I have a roper-whitney
punch press, I have a use for such a machine (making square dies).
I think that once I convert my Bridgeport to CNC, which I am collecting
parts for, all I would need is a device to lock the spindle from rotating,
and a collet/insulator fixture that would fit in the spindle, and I could
use most of the mill features as part of the machine.

Bob Langlois makes it look awfully complicated by dragging out the plans
and including all the info on building your own PCB shop for this one
project.  I think he thinks this will somehow insulate him from legal
liability for damage or injuries!  I communicated with him on a different
newsgroup about 1 1/2 years ago about PCB making and the legal aspects of
build it yourself project kits.

					Jon