Re: EDM GENERATORS

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
<dave_mucha@...> wrote:

>
> Blowing the power supply to hell does not sound like so much fun.
>
> Some of the process sounds contradictory. in the R/C style, a spark
> gap of some 0.001" can be bridged by a low voltage.
>
> running 600 volts, the spark would jump a huge distance.
>
>
> it does seem that one should have a test for short before each pulse,
> if that can be added to the circuit.
>
> Dave
>

The high voltage supply is heavily current limited, all it does is
ionize the gap then lower voltage supplies can be used to stick some
power in somewhat like a plasma cutter but much lower voltage. If
nothing else this sort of regime allows for a smaller supply as the
high voltage transformer is a low power supply and the low voltage
supply can be roughly the machining voltage (say 30-40v) so at the
required machining current the power required is smaller and hence the
transformer is also smaller.

Graham