Re: [CAD_CAM_EDM_DRO] PC ports, Encoder resolution and EDM PSU info

Sorry, my error. I have the Model Engineers Workshop articles here as well,
and the electronics appears to be identical to the Home Shop Machinist
Langlois electronics. In fact, there is a note above the schematic that
states "Based on a design by Robert Langlois of Ontario, Canada".

The SEDM plans available from Dan Mauch < http://www.seanet.com/~dmauch/>
uses a PC and software to control the stepping motor.

Robert Grauman in Sunny Alberta

> Robert;
> the articles in question are on Model Engineering Workshop magazine, and

are written

> by the same chap that wrote the article on the cnc mill his name is Peter

Rawlinson,and the

> articles in question are on issues No 52,57,and 58.Im looking at them now
>
> regards
> mariano
>
>
> Robert Grauman wrote:
>
> >
> > The article you speak of was written by C. R. Amsbury, and appeared in

the

> > 16 July 1976 (No. 3541) and concluded in the 6 August 1976 (No. 3542)

issue

> > of Model Engineer. You are correct that a stepping motor was used, but

no

> > PC board layout is given. A commercial PC board was used to drive the
> > motor. I built one, and used it successfully for a time, but it was

very

> > slow. This was due to the very low amperage available from the power
> > supply. It operated at ~300 Volts. I eventually realized that this was

a

> > lethal voltage to have exposed, and I dismantled the machine. The drive
> > mechanism was not well designed, and it developed rotational play.

Amsbury

> > published an update in the 2 October 1981 issue of Model Engineer, with

a

> > redesigned drive, and an operating voltage of ~40 Volts, but still no PC
> > board.
> >
> > My bibliography of shop built EDMs includes the Strictly IC series

starting

> > in the August/September 1993 issue and ending in the April/May 1994

issue.

> > Then there is the HSM "Build an EDM" series by Robert Langlois which was
> > published as a book by Village Press. Finally, Benjamin Fleming

published a

> > small book describing a "Metal Disintegrator". I choose to ignore the
> > Popular (Mechanics/Science?) line voltage "tap busters" as being too
> > dangerous to consider.
> >
> > Robert Grauman in Sunny Alberta
> >
> > > Jon;
> > > some time ago in the Model engineering workshop magazine was a project
> > about a edm machine, and for what I can remember it used
> > > stepper motors for lifting the electrode up and down,everything was
> > described, power supply ,mechanics,and even the pcb was
> > > available.
> > > regards
> > > mariano
> >
> > Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the

discussion of shop built systems, for CAD, CAM, EDM, and DRO.

> >
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>
>
> Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the

discussion of shop built systems, for CAD, CAM, EDM, and DRO.

>
> Addresses:
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> bill,
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>