Wire-EDM Know-How?
I.T. Daniher
Jordan Miller
http://www.youtube.com/watch?v=pBueWfzb7P0
jordan
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Andrew Shindyapin
Jordan Miller
John Griessen
> I've been tossing around ideas with a friend concerning the production of an open-source Wire EDM machine based on electrolytic
> supercaps.
How are you planning to get up to high volts for the electric discharges from supercaps
that hold 1.2 Volts each? Design a power supply with inductors and switching transistors
simple, but making spiky RF noise? Borrow an alrready designed one?
Are you going to make this open hardware licensed like TAPR license?
John
I.T. Daniher
How are you planning to get up to high volts for the electric discharges from supercaps
that hold 1.2 Volts each? Design a power supply with inductors and switching transistors
simple, but making spiky RF noise? Borrow an already designed one?
Are you going to make this open hardware licensed like TAPR license?
--
John Griessen
> A paralleled bank of supercaps could provide several dozen Farads at 12v,
If 12 V is the recommended discharge voltage, and you start with the usual
1.2 or so Volts of a cell of a supercap, you would need ten in series to get to
12V without an inductive power supply circuit between to up the volts.
Putting caps in series makes effective Farads go down and cost more per bang.
There is going to be some voltage that gives you a practical gap for sparks
to do machining -- I'm ignorant of that gap distance though. It needs
to be large enough to allow for your positioning resolution so you don't accidentally
touch the work with the electrode, and probably to get the best blasting action.
The discharges do work in a tiny amount of time, so they will also be able to
launch powerful radio waves, so the energy store supercaps and wires to the electrodes
will need to be in a metal box to stop interference from emanating.
John
I.T. Daniher
If 12 V is the recommended discharge voltage, and you start with the usual
1.2 or so Volts of a cell of a supercap, you would need ten in series to get to
12V without an inductive power supply circuit between to up the volts.
Putting caps in series makes effective Farads go down and cost more per bang.
There is going to be some voltage that gives you a practical gap for sparks
to do machining -- I'm ignorant of that gap distance though. It needs
to be large enough to allow for your positioning resolution so you don't accidentally
touch the work with the electrode, and probably to get the best blasting action.
The discharges do work in a tiny amount of time, so they will also be able to
launch powerful radio waves, so the energy store supercaps and wires to the electrodes
will need to be in a metal box to stop interference from emanating.
John