I found some of the earlier articles in Home Shop Machinist Issue's May/June 1995 and September/October 1995. I do not have part 2 published in July/August 1995.
However, in the 3rd part Robert Langlois describes the stepper motor operation in conjunction with the capacitor voltage. His front panel has switches allowing combinations of 50uFd, 100uFd, 200uFd and 400uFd in parallel. Essentially he moves the stepper motor down (electrode) if the voltage rises above a pot set reference voltage and moves it up if below a second pot set reference voltage. It doesn't move the motor if the voltage is between these two set points. The voltage on the capacitors ranges between 0V and 100V which is divided by 20 for a 0V to 5V value compared to the Pot values. John Dammeyer He also references Model Engineer 1976 July, August, November and 1981 October. Strictly I.C. 1993 Aug/sept, Oct/Nov, 93-94/Dec/Jan., 94 Feb/Mar, 95 Feb/Mar (letters) Home Shop Machinist 91 Jan/Feb, 91 Jul/Aug, 92 May/Jun, 94 May/Jun > -----Original Message----- > From: [email protected] [mailto:[email protected]] > Sent: January-31-21 11:51 AM > To: 'Enhanced Machine Controller (EMC)' > Subject: Re: [Emc-users] EDM from scratch > > Problem solved. > > -----Original Message----- > From: John Dammeyer <[email protected]> > Sent: January 31, 2021 2:35 PM > To: 'Enhanced Machine Controller (EMC)' <[email protected]> > Subject: Re: [Emc-users] EDM from scratch > > Rats. I'm missing #169 for some reason. > > The series I was thinking about was in issues #57..#60 and with addendums in > #64 and #68. The #68 issue discussed dielectrics safe for the home workshop > and the liquid mentioned may still be available in the UK. > > John Dammeyer > > > > -----Original Message----- > > From: Gerrit Visser [mailto:[email protected]] > > Sent: January-31-21 11:06 AM > > To: 'Enhanced Machine Controller (EMC)' > > Subject: Re: [Emc-users] EDM from scratch > > > > Issue 168, Oct 2010 is the first installment > > > > Gerrit > > > > -----Original Message----- > > From: John Dammeyer [mailto:[email protected]] > > Sent: January 31, 2021 1:31 PM > > To: 'Enhanced Machine Controller (EMC)' > > <[email protected]> > > Subject: Re: [Emc-users] EDM from scratch > > > > Andy, > > Check out this page: > > http://mikesworkshop.weebly.com/a-spark-erosion-apparatus.html > > > > Also Model Engineer's workshop had a 4 part series on building one. > > I'll go through my archives and see if I can find them. I'm pretty sure I > had all 4. An online search doesn't pinpoint which issues. > > > > John Dammeyer > > > > > > > > > > > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
