On Monday 04 March 2013 22:13:36 TJoseph Powderly did opine: > 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 > I'll toss my congrats into the kitty here too. And if possible, I'd sure like to see some of that in the wiki. It would I believe, be an enhancement to the 'state of the art'.
Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> BOFH excuse #370: Virus due to computers having unsafe sex. I was taught to respect my elders, but its getting harder and harder to find any... ------------------------------------------------------------------------------ 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
