User interface seems rather simple although I have some problem with widgets to get numbers into linuxcnc. I almost got something useful to test machine manually but for real machining programming is needed.
Happen to know any more or less g-codes for these motions? g-codes for control of flush? g-codes for control of EDM power source? As soon as user interface start to be more useful it is also time to create som kind of fork so I could upload it to the repository. I guess the the same will also happen with the g-codes then I start to look at them. Regards Nicklas Karlsson On Tue, 20 Dec 2016 23:23:59 +0700 TJoseph Powderly <tjt...@gmail.com> wrote: > Nicklas hello > > 2 basic motion types are useful ( at least 2 ) > > 1 is jumping, a way to remove debris, > the debris generated in erosion needs to be removed, > it lowers the conduction of the environment and disturbs a voltage drop > based control > flushing thru the tool is very good but it is difficult to put small > flushing holes thru the tool > these holes need to be so small that the overcut is slightly larger > than the radius > when such a small hole is used, there is no 'pin' left in the hole > a pin is easily thermally deformed and shorts the tools and disturbs > the control > a large pin is strong but needs to be removed mechanically afterwards > ( extra machining ) > > so, without these holes,the motion of jumping is used. > no holes are made in the tool > the method is to cut for a while, then retract some distance and > return to the cut > this action 'pumps' clean fluid in and dirty fluid out > it is very effective and the user does not need tiny deep holes thru > the tool > (I've drill many feet of .012" holes thru graphite electrodes) > really high speed jumping will even remove carbon deposits on the > tools ( these deposits change the conduction too ) > ( this carbon is not from the tool but from the electrical splitting > of the oil into hydrogen and carbon ) > https://www.youtube.com/watch?v=YNSh_OL035E > jumping is a great aid in cutting and even in arc prevention > > 2 is orbiting > orbiting is a motion related to cutter compensation > the tool size can be exagerrated by motion, and the exaggeration is > programmable > > the tool is smaller than the desired form by an amount that is suited > to the roughing power settings > after roughing, the same tool can be used to finish despite it's > energy envelope is smaller > the smaller energy envelope would not 'reach' the work surface UNLESS > the tool is moved off center > the tool is moved to make it describe a larger tools volume. > > orbiting can be 2 or 3D in motion and 2 or 3D in undersize. > http://www.edm.kd-solution.com/en_edm11.html > the big reason to orbit is to reduce the cost of making the electrodes > in most cuts you need multiple electrodes to make a single form > because there is wear on the tool when it is used > and > each tool has to be replaced onto the tool holder in _exactly_ the > same position, orientation, and shape > in old non-orbited sink edm different sized tools of the _same_ shape > were made and this was very expensive and time consuming > these tools were the rougher pre-finisher and finishing electrodes > with orbiting AND good tooling, only a single form has to be produced > (say 3 to 5 times for high precision cavity ) > > so you can make a 1" cube cavty with a .990 cube rougher and .996 > prefinisher and .998" finisher > OR > make 3 pcs .990" cube see its just easier to maintain precision > also > orbiting lets you adjust the final size ( you can make the tool too > small and still egt the right final form and precision > > the tool MUST be made with the orbit used in mind > the cnc edm will 'unwrap' the undersized that is 'warpped' onto the > electrode > > there are limitationa and tradeoffs to be considered ( generated > corner radii, cutting times, and more ) > > so jumping ( esp high speed jumping ) is really a flushing technique > and > orbiting is a way to make precision cavities with better control over > production and cost > > > in general, edm is only used of neccesary and modern high speed mills > have reduced the need for most sink edm work > but the are forms that the mills can NOT do > sharp inside blind corners > and > thin deep ribs > > in these operations sink edm has a strong position, and needs good > strategies to remove stock efficiently > orbiting and jumping are basic strategies that are proven to make money > for tool makers > > theres a load to this > I have written edm orbting routines on Fanuc System 8 thru 11 and for > Heidenhains 306/406/416 series > the orbits always communicate to the erosion power settings databases to > determine the new 'radius' of expansion > so its a lot like cutter comp being used for roughing then finishing passes > > regards > tomp tjtr33 > > On 12/20/16 20:50, Nicklas Karlsson wrote: > > Yes I am retrofitting an old EDM machine. It have been a year two before I > > started but finally I have all the needed hardware. As is now I am > > starting to think about user interface and could vaguley remember somebody > > talked about it earlier, worst problem is probably I am not totally sure > > what is exactly needed and then it come to motions basically have very > > little knowledge what moves might be useful. > > > > 2016-12-20 13:04 GMT+01:00 Sarah Armstrong <sarahj.armstron...@gmail.com>: > > > > > > > ------------------------------------------------------------------------------ > Developer Access Program for Intel Xeon Phi Processors > Access to Intel Xeon Phi processor-based developer platforms. > With one year of Intel Parallel Studio XE. > Training and support from Colfax. > Order your platform today.http://sdm.link/intel > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Developer Access Program for Intel Xeon Phi Processors Access to Intel Xeon Phi processor-based developer platforms. With one year of Intel Parallel Studio XE. Training and support from Colfax. Order your platform today.http://sdm.link/intel _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
