Re: Brand new to the group

Ian,I fooled with some timers and then quit. I looked at the spark
waveforms using an oscilloscope and hidden in all the noise seemed to
be a sawtooth waveform, a dead give away that what we have is a
relaxation oscillator. The frequency of the arcing waveform is
dependent on the capacitance, resistance and I'm sure the spark gap
and the fluid used for the dielectric.Thus it seems to me that the
frequencies will be dictated by the circuit and mechanics. Please
don't get rough if you think I'm wrong. Until I see otherwise I
believe it will be difficult to use variable frequency etc with the
mechanical system I am using for this machine.
Richard.

--- In CAD_CAM_EDM_DRO@egroups.com, "Ian Wright" <Ian@i...> wrote:
> Welcome to the group Richard. I take it you didn't go further than
the basic
> design of EDM - i.e. you didn't add on the frequency control bit.
>
> Ian
> --
> Ian W. Wright
> Sheffield UK
> www.iw63.freeserve.co.uk
> ----- Original Message -----
> From: "Richard " <phrh@w...>
> To: <CAD_CAM_EDM_DRO@egroups.com>
> Sent: 02 November 2000 19:50
> Subject: [CAD_CAM_EDM_DRO] Brand new to the group
>
>
> > At this time it seems I must do plenty of reading just to get on
> > board with you guys. I did build the EDM setup somewhat like
Langlois
> > described. I followed his instructions for the stepping motor feed