On 25 Oct 2008 at 8:35, Chris Epicier wrote: > Hi all > > Got my screen resolution soved - by miracle. I had to move the > hardware into another case, that is more workshop compatible. Fired > the PC up and tataa : kubuntu asked a confirmation whether or not to > continue with low res. So I can go back to my initial task: hot wire > cutting. > > Q4: From what I understand, emc can work off gcode only, istthat true? > If so, then there has to be a kind of a preprocessor to generate the > g-code file. If I get a suitable library regarding gcode generation, I > believe I can handle this.
There are several g code generators on the wiki site that work with EMC or standalone. Don't know if they will help directly in your task, but are worth a look. http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Simple_EMC_G-Code_Generators > > Then that gcode must be processed and the actual cutting handled. > That's where I see emc off course. In axis, the setup instead of a > couple of 2D views could simply be the view as is, provided the > tension hooks of the wire and the penetration point of the wire in the > foam is shown. That could be done in the 3D panel of axis I believe > (probably Jeff to comment in this). Further, similar to milling, I see > the wire beeing visualised as a whole. The cut paths of the wire could > be shown on the block surfaces, as planned and as done, all along the > same way as milling is visualised. I will try a mockup to visulise my > idea later this weekend and send this to whome is interested. I do > hope, that this lines give a picture. Q5: can above interface be added > to axis / emc? This would be the same as wire EDM except on the horizontal plane. BTW, this has been done before so your not forging off into new areas but into seldom done areas. http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Videos#Wire_cutting http://www.cnczone.com/forums/showthread.php?t=10311 I've cut foam wings in the past and understand what you need for positioning but I have not done anything like that with EMC :( Sounds like a fun project. Seems to me that you need two axis that move in the YZ plane that are independent of each other to move the wire ends as needed to produce the airfoil shape of tapered wings... I'm guessing that you can do a config with 4 linear axis and program them to move how you need. Someone that knows better can comment on that... > > Here is a collection of the parameters I see so far, relevant to hot > wire cutting. These should be presettable but also chaneable within > axis: - Foam: influences travel speed wire heat, wire diameter and > wire tension => I see a kind of database, inside the preprocessior / > gcode generator, accessible from within axis - travel speed of wire - > tension of wire (if controlled, could result in much better cutting > results, since wire extends when heated an retracts whenn cooled, as > soon as entereinginto foam) - temperature of wire (current passing > through it, measurable at free part only) - travel speed, especially > at tight turns and/or sharp corners You might consider a constant force on the wire like a small pneumatic cylinder or a weight to take up the slack as the wire heats up... Just thinking out loud. > > best regards chris > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
