Re: [CAD_CAM_EDM_DRO] EDM - Should it have a burned appearance?

Hi:
Yup, a burnt appearance is quite normal on an EDM finished surface,
until you scrub off the cooked dielectric.
You may also see some discolouration in thin areas from the heat.
Cheers
Marcus
-----Original Message-----
From: garyswindell@... <garyswindell@...>
To: CAD_CAM_EDM_DRO@yahoogroups.com <CAD_CAM_EDM_DRO@yahoogroups.com>
Date: Monday, November 19, 2001 6:10 AM
Subject: [CAD_CAM_EDM_DRO] EDM - Should it have a burned appearance?

>I have small EDM that I am doing some experiments with. It uses an
>RC type oscillator. 42 Volts 1Amp. Petroleum based dielectric fluid.
>
>The general question to those who have actually seen these work
>is...Does the area being cut end up looking slightly burnt? Two
>possible answers:
>
>1) You are using electrical sparks to cut something and these are
>quite hot so naturally there is some burning
>
>OR
>
>2) It should not look burnt and the only reason it does is because
>you are getting some arcing.
>
>
>Thanks.
>
>
>Addresses:
>FAQ: http://www.ktmarketing.com/faq.html
>FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>
>Post messages: CAD_CAM_EDM_DRO@yahoogroups.com
>Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
>Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
>List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...
>Moderator: jmelson@... timg@... [Moderator]
>URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>bill,
>List Manager
>
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>