Hi Pete i think it was AGie BiPuls 2 power supplies 1 for ignition (selectable 100 150 200 270V) about 750mA 1 for guts power 60 amp increments big TO3 power transistors the finefinish supply was separate only 5A iirc The Charmilles D10 was sweet could cut in mud and never arc and still gave good finishes big inductor in guts dc power supply looked like a trafo D-10 killed off the AGie ABs which ruled the small insert/spinnerete world D-10 with a P25 isopuls is still a wanted item
the RC supplies triggered when the gap was ready the early transistor supplies fired at a given frequency later isolpuls mimiced the RC/RCL supplies by waiting for the gap to be ready i was AGie sinker service in 70-90s ;-) tomp On 03/09/2016 10:59 PM, Pete_Gruendeman wrote: > TJ: > Slightly off-topic: Your explanation of isopulse technology explains > at least partially why RC based EDMss produce pretty darn good finishes-- > because the energy per pulse is mostly constant. The capacitors dump their > energy, the arc goes out and that's it. The short pulse durations do cause > greater electrode wear, even with positive polarity on the electrode. > > I ran a Charmilles D-10 and a D-20. The D-10 was an Isopulse machine > and I think the D-20 was also. I also programed and ran an Agie AT-50, which > was later re-branded as the U-100. I don't remember the name of the pulse > technology it used. Electrode wear was remarkably low on the Agie. > > Pete Gruendeman > > -------------------------------------------- > On Wed, 3/9/16, TJoseph Powderly <[email protected]> wrote: > > Subject: Re: [Emc-developers] EDM gap control (Control parameters) > To: "EMC developers" <[email protected]> > Date: Wednesday, March 9, 2016, 12:10 AM > > Niklas Pete, > if you want ISOPULS ( isoenergetic pulses that > have uniform craters ) > then all the worry > about frequency is useless > > if you dont need uniforn surface finish, then > ignore this comment > > if you > DO want uniform surface finish, then you do not use > repetitive > pulse grnerator > instead, you wait for ionization ( a kind of > indetermonate latency of > conduction) > THEN start decrementing the ontime. This was > the joules delivered are > equal ( the energy > is equal ) > Once the ontime is finished, the > current is turned off and the off time > is > waited > THEN you turn on a tiny exciting > voltage and wait for another ionization > ( > and voltage drop ) before starting the next ontime current > flow. > > some pix: > http://www.edm-products.com/Dielectrics/ifase/ifase_1.htm > look at figure 3 > if you wait > for the ionization (wait for the voltage to drop) > and then deliver current for the duraction of > 'ontime', > the energy delivered will > be uniform, and the surface crater will be uniform > if not, the energy per pulse in non-uniform, to > the extreme that some > pulses deliver nearly > no energy! > see figure 4, > when the strategy is isoenergetic, the current > waveform will be uniform > and the leading > edge of the voltage will vary. > if not > isoenergetic, the leading edge is static on the scope, > but the current wave form will vary. > > On 03/09/2016 01:59 AM, > Nicklas Karlsson wrote: > > A > microcontroller with suitable peripherals for power > conversion is cheap and do the work much better. I know > about: stm32f334, Infineon xmc4xxx something, maybe texas > instruments and Microchip. > > > > I am working with stm32f334. It have a > high resolution timer equal to about 4GHz clock frequency > with a lot of triggering options, DAC, fast comparators and > cost maybe a few dollars. There are also cheap development > boards available. > > > > > I guess spindle off/on signal may be useful to turn off/on > generator and some m-code is useful for the parameters? > > > > Regards Nicklas > Karlsson > > > > > ------------------------------------------------------------------------------ > Transform Data into Opportunity. > Accelerate data analysis in your applications with > Intel Data Analytics Acceleration Library. > Click to learn more. > http://pubads.g.doubleclick.net/gampad/clk?id=278785111&iu=/4140 > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785111&iu=/4140 _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
