Thank you Thomas, filed your excellent info for my project. Just finishing up a shop built cnc gantry machine (uses Pathpilot), then onto the next project which I think will be a WEDM machine.
Gerrit -----Original Message----- From: Thomas J Powderly [mailto:tjt...@gmail.com] Sent: February 1, 2021 12:57 AM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] EDM from scratch 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.ht > ml (Google translate helps here:-)) > > Again, my focus is on wire EDM but there must be similarities > > Gerrit > > > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
