Re: [Emc-developers] EDM gap control

On 27 February 2016 at 03:33, EBo wrote: > cool! I/we may need to make sure that we know which repositories. http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=shortlog;h=refs/heads/feature/reverse-run-master2 Nothing at all to do with me, all Rob Elllenberg's work. I

Re: [Emc-developers] EDM gap control

On Feb 26 2016 5:45 PM, andy pugh wrote: > On 27 February 2016 at 00:40, TJoseph Powderly > wrote: >> i didnt know the linuxcnc adaptive feed rate was bidirectional > > It isn't in the released versions, but there is a demo branch with > bidirectional adaptive feed. cool!

Re: [Emc-developers] EDM gap control

wow! thanks andy will look for it. really a big thing for me. +++many beers for andy On 02/27/2016 08:45 AM, andy pugh wrote: > On 27 February 2016 at 00:40, TJoseph Powderly wrote: >> i didnt know the linuxcnc adaptive feed rate was bidirectional > It isn't in the released

Re: [Emc-developers] EDM gap control

On 27 February 2016 at 00:40, TJoseph Powderly wrote: > i didnt know the linuxcnc adaptive feed rate was bidirectional It isn't in the released versions, but there is a demo branch with bidirectional adaptive feed. -- atp If you can't fix it, you don't own it.

Re: [Emc-developers] EDM gap control

i didnt know the linuxcnc adaptive feed rate was bidirectional mydynac's tests were just slow down, ditto for ray henry my bad thanks andy tomp On 02/27/2016 12:02 AM, andy pugh wrote: > On 26 February 2016 at 15:06, TJoseph Powderly wrote: > >> the normal motion in edm is a

Re: [Emc-developers] EDM gap control

On 26 February 2016 at 15:06, TJoseph Powderly wrote: > the normal motion in edm is a jiggly motion that on-the-average moves > towards a destination. Yes, but with bidirectional adaptive feed based on a process variable, that it what you will get. -- atp If you can't fix

Re: [Emc-developers] EDM gap control

At the start of a cut the machine moves at a positioning rate, reading the gap voltage, and possibly current, watching for when the signal indicates that it is close enough to the workpiece to stop moving.  This is the same algorithm whether the electrode is 5cm away or 0.002mm away.  It's all

Re: [Emc-developers] EDM gap controlnt

hi pete i wasnt adressing your comments yeah i agree sink edm 'escapes' not 'reverses' imo: hole poppers reverse toward the start point sinkers escape to a safe point wedm reverses along the previous path ( usually ) edm grinding , well, i never saw it reverse really not on AGie nor Elox edm

Re: [Emc-developers] EDM gap control

Thanks for the info. Out of curiosity, when starting a new cut, how does the conventional EDM move onto the part? The equivalent of a G0 might be fast enough that by the time it senses that it has touched the part, you could be moving fast enough to break the tool or wire. So, do you do a

Re: [Emc-developers] EDM gap control

Hi Tom:> path reversal is what you do when things are WRONG > path reversal is not how you move to the correct position.    These > statements are true for wire EDM but not for sinker.  There are many reasons > to back out with sinker, including timed retraction before the erosion gap is >

Re: [Emc-developers] EDM gap control (Control parameters)

good going nicklaus! many experienced operator never see the relation of setpoint and 'smooth' but beware, too smooth is sluggish, so jab a screwdriver in the gap during tests to make sure the system immediately retracts. the setpoint for graphite to steel for positive polarity is 29 to 32 volts

Re: [Emc-developers] EDM gap control

adaptive feed slows down till the velocity does not overshoot the removal rate that aint edm, thats following the slow truck in the slow lane reversal aint what edm is about unless things are near fatally bad. the normal motion in edm is a jiggly motion that on-the-average moves towards a

Re: [Emc-developers] EDM gap control (Control parameters)

Thanks. I start with Z-motion only and try to control distance to keep discharge voltage at 29 volt. Then this work it is time for optimal paramers and other directions. Regards Nicklas Karlsson On Fri, 26 Feb 2016 14:06:19 + (UTC) Pete_Gruendeman wrote: > Hi:Pete

Re: [Emc-developers] EDM gap control (Control parameters)based

traditional edm gap control as developed by the Lazerenko's is based of maintaining a gap voltage. * non-traditional ( in the niche of EDM ) can be ignition delay based, current exchange * or a hybrid ( see JSEM journals the japanese journals or ISEM for the rest of the EDM world or

Re: [Emc-developers] EDM gap control

nicklaus there is NO feedrate for edm period! the process determines the correct position the control system should move to the correct position as fast as possible the correct position should be close if the control system is at all adequate for edm there is NO feedrate for edm tomp 40+ years

Re: [Emc-developers] EDM gap control (Control parameters)

Karl Speed control is normally a direct function of a current setpoint in the PWM controller. EDM power supplies look at every single pulse to determine if the current and voltage is within a specified range. The quality of the cut is partly a function of the speed and the energy in every

Re: [Emc-developers] EDM gap control (Control parameters)

Hi:Pete Gruendeman, long time EDM operator here.  I have also written EDM software which went forward, backward and escaped sideways off the program path. EDM motion is based on either:Positioning, at whatever rate you program though it's typically rather slow;or Erosion, with no feedrate what

Re: [Emc-developers] reverse feed [was: EDM gap control]

any example hal files,showing how to set up etc , i'd like to try this On 26 February 2016 at 13:23, wrote: > https://youtu.be/3aYaHxT6ZnQ > > I think it is 100 lines. > > > On Fri, 26 Feb 2016 06:06:15 -0700 > EBo wrote: > > On Feb 26 2016

Re: [Emc-developers] EDM gap control (Control parameters)

I understand flushing is important but nothing about how ot adapt speed. > On Friday 26 February 2016 05:07:20 Nicklas Karlsson wrote: > > > > >Anybody familiar with EDM who could tell me how to adjust the feed > > > > rate for EDM operations? > > > > > > Not a very trivial task but it can be

[Emc-developers] reverse feed [was: EDM gap control]

On Feb 26 2016 2:56 AM, andy pugh wrote: > On 26 February 2016 at 07:34, Nicklas Karlsson > wrote: >> Anybody familiar with EDM who could tell me how to adjust the feed >> rate for EDM operations? > > There is a motion.adaptive-feed pin that can control the

Re: [Emc-developers] EDM gap control (Control parameters)

On Friday 26 February 2016 05:07:20 Nicklas Karlsson wrote: > > >Anybody familiar with EDM who could tell me how to adjust the feed > > > rate for EDM operations? > > > > Not a very trivial task but it can be done. There is a youtube video > > showing and EDM running on linuxcnc. Do a search. The

Re: [Emc-developers] EDM gap control (Control parameters)

> >Anybody familiar with EDM who could tell me how to adjust the feed rate > >for EDM operations? > Not a very trivial task but it can be done. There is a youtube video > showing and EDM running on linuxcnc. Do a search. The problem comes in > when you have to backup as some EDM machines do.

Re: [Emc-developers] EDM gap control

On 26 February 2016 at 07:34, Nicklas Karlsson wrote: > Anybody familiar with EDM who could tell me how to adjust the feed rate for > EDM operations? There is a motion.adaptive-feed pin that can control the feed-rate according to an input to HAL. You would use

Re: [Emc-developers] EDM gap control

Not a very trivial task but it can be done. There is a youtube video showing and EDM running on linuxcnc. Do a search. The problem comes in when you have to backup as some EDM machines do. There is a yahoo group for edm as well and they have a lot of info there. Let me know if you dont come