Hi Gerrit
the difference between senkung and draht erodien generator
is the pulse width
in wedm 1-10uS is the entire spectrum
in sink edm 1-3000uS is the spectrum
in any edm that uses the very sort pulse,
it is important that the current shut-off be complete and very fast (
all inductanc ein system must be watched)
if you can turn the power OFF very very quickly, you will increase the
metal removal a LOT.
the reason is
the metal removel is the expulsion of a tiny crate pool of molten material
if the thermal change ( from current supplied an heating the pool)
to the time hwne current is removed and the thermal mass of the
surrounding environment ( oil water gas )
that makes for a more IMplosive force on the hot plasma bubble channel
over the pool.
The quickness of the bubble collapse cause more of the puddle to be ejected
a slower deflating lets most of the melted material to cool back on the
surface
look for Dr. Schumakers description from AGie
i cant find it now but it was an excellent presentation of how a spark
removes material
the 9 or so pictures are a whole edm education
but try this instead
https://core.ac.uk/download/pdf/34635871.pdf
best of luck with the wedm
(btw it will be a good hole drill spark generaor if it works for wed,
just needs up to 100uS max on time )
tomp
On 2/1/21 12:53 AM, Gerrit Visser wrote:
Another source of information about pulse generator design:
https://langfordw.pages.cba.mit.edu/desktopWEDM/electronics/
https://www.cnc.info.pl/drazenie-metoda-domowa-moje-proby-t11692-20.html
(Google translate helps here:-))
Again, my focus is on wire EDM but there must be similarities
Gerrit
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