On 03/04/2013 08:40 AM, sam sokolik wrote: > oops - here are the pictures of his edm work > > http://electronicsam.com/images/Pete_G/edm.jpg > > http://electronicsam.com/images/Pete_G/edm_xc.jpg > > sam > > > > On 3/4/2013 8:30 AM, sam sokolik wrote: >> I had a little CNC get-together Saturday mainly to help Pete G setup his >> 5i25. Pete G had been mentioned recently on the list about his diy edm >> setup. He is using rutex step/dir drives and the rutex break out >> board. I sent peter from mesa the pinout of the rutex BOB and he sent a >> new firmware for the 5i25. Updating was painless and we looked at the >> port with a scope to double check that the step/dir pin locations had >> changed. I had found someones 5i25 config on the forum and set it up >> for Pete_G hardware. (he isn't using any daughter boards yet.) >> >> This is the email I got back from him after running all day sunday.. >> >> Hi Sam: I set up the Rutex based controller on by Bridgeport mill, >> edited the scale values in the .ini file and went zooming. It went in >> the right directions, and fast. I ran out of nerve at 3/4 inch per >> second/ 45 IPM. The machine never went as fast as 35 IPM before. The >> linuxcnc has a much nicer interface than the ancient version I was >> running. I like it a bunch. Thank you for working with me on this >> project. This is a great improvement over where I was. >> >> So that is a big YAY - he has a Dyna 4400 that he has starting converting. >> >> Thanks Peter(mesa) for your quick firmware mod and the overall coolness >> of your hardware :) >> >> He also talked a bit about his edm (couple emails). (his own software).... >> >> You mentioned that my name came up on the list-serve about EDM >> work. Attached is a picture that shows a little embossing wheel that I >> made with coordinated X and C motion and a sample of wire EDM work I >> did. In both cases, the software executes the G-code forward and >> backward, whatever it takes to maintain the erosion gap voltage as >> needed. The sinker software will back out on a programmed basis, either >> along the pathway in or toward pre-programmed escape points. The wire >> program backs up a specified distance (regardless of the number of line >> segments traversed) and then follows a small "X", trying to clear the >> crud and get sparking again. If that fails, the motion stops but >> controlling the wire travel speed or shutting off the wire was not >> included in the program. One day i'll do that and add other necessary >> features. I also have a picture (not attached) where I eroded with >> coordinated Z & C motion and threaded a hole in a file. >> >> Attached is a picture that shows the roll-die and the threaded >> hole. For flushing, the threading electrode backed its way out of the >> hole. When making the roll-die, it was rolled across the face of a flat >> electrode with coordinated X & C motion, with escape moves in the +Y >> direction for flushing/ gap contamination. You can post either of both >> of the pictures. >> >> I should have explained that the escape moves and backing out for >> flushing are NOT part of the g-code. The programmer couldn't possibly >> know at what points the electrode would need to be backed out. My >> software monitors that gap voltage and when it is too low it will create >> it's own destination_X, y, z, c values to move to in order to clear the >> problem. Once the erosion gap returns to normal, my software erodes its >> way back to the where it escaped from the program path and then >> continues on the programmed path. The key to EDM is to monitor erosion >> conditions (voltage) and to move forward and backward on the programmed >> path to maintain erosion conditions. Or escape off to the side if >> needed. Some people insist that there must be a feed rate in EDM. >> There is not. >> >> pete >> >> Thanks to all for all the hard work on the linuxcnc project!! >> sam >> >> >> ------------------------------------------------------------------------------ >> Everyone hates slow websites. So do we. >> Make your web apps faster with AppDynamics >> Download AppDynamics Lite for free today: >> http://p.sf.net/sfu/appdyn_d2d_feb >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> > > > ------------------------------------------------------------------------------ > Everyone hates slow websites. So do we. > Make your web apps faster with AppDynamics > Download AppDynamics Lite for free today: > http://p.sf.net/sfu/appdyn_d2d_feb > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > Sam,
Please tell Pete congratulations on his work. I've harped for years here that there is no feedrate. Right on Pete! I'm developing similar by myself. At the time I got your email, I was writing oneshots for arduino, triggered by the beginning of current flow, an OnTimeShot runs, then a single OffTimeShot. This makes each tiny crater a uniform size, where a constant on/off/on/off will vary in diameter. Got the 1st half running and on the scope now, I do not have the ionization voltage trigger yet. Anyway, congrats to Pete G and would like to see how he's implemented this. thanks TomP tjtr33 ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
