On Friday 21 May 2010, Mark Wendt wrote: >On 05/21/2010 11:02 AM, Gene Heskett wrote: >> Not part of the limits problem, but a slightly optimized Test_strip.ngc: >> >> (My first attempt at writing G Code for bamboo fishin' poles) >> G18 G20 G40 G49 G54 G80 G90 G94 >> G55 G0 X0 Z0 (are you sure Z=0 is correct for the start?) > >Not really.. ;-) I'm still trying to figger this stuff out. My X0 >point is actually an 2" away from the leading edge of the work piece. >My idea was to be at the point where the "apex", in other words the >theoretical meeting point of the two saws, being at the the Z0 point 2" >prior to actually starting the cut, then descending to the beginning >depth 1" prior so as to enter the work piece at the correct beginning >depth. I suppose I could use different distances from the start point >of the work piece > >> G1 F40 X1 Z-.0640 (big taper first inch) > >hasn't hit the "real" work piece yet :)
>> (G1 F40 X2 Z-.0662) (you are going in straight line at Z-.022 per " of X) >> (G1 F40 X3 Z-.0684) >> (G1 F40 X4 Z-.0706) >> (G1 F40 X5 Z-.0728) >> G1 F40 X6 Z-.0750 (here you start a -.030" taper) >> (G1 F40 X7 Z-.0780) >> (G1 F40 X8 Z-.0810) >> G1 F40 X9 Z-.0840 (then straight for last 2 inches) >> (G1 F40 X10 Z-.0840) >> G1 F40 X11 Z-.0840 >> G55 G0 Z0 (I would go higher here for return clearance) >> (G4 P2) >> G55 G0 X0 >> M2 > >I really don't want to change the Z dimensions at those 1" stations. The point is that EMC will hit those exact locations as it goes by them, and it will do the moves without any little hitches in the motions as it does, faster, smoother being a Good Thing(TM). ;) >That's what the rod taper is based on. I'm using a 2" lead in and a 2" >lead out both for tool clearance from the work piece, and also as >wastage length on the strip for binding the strip when it's being glued up. Is your X in feet then? Otherwise this seems like an awfully short fly rod. ;) >> I suspect you'll need to protect the fixtures although I don't recall if >> you said how you are holding the strips. > >I'm using a vacuum hold down to keep the strips in place, under the >strip. No fixturing, no bolts, nothing else to worry about getting in >the way of the blades as they cut through the bamboo. So the mount is going to be a wee bit elastic due to the rubber/plastic gaskets to maintain that seal I would think. No idea what your vacuum pump is, but I have one that is intended for AC evacuation duties that can pull a -29.2" vacuum when the barometer is in the 29.4 range. Beware that those pumps will output a very very fine oil mist when they have pretty well reached their ultimate pull. I left it running overnight once while bagging a lamination stack, and found my shop had a visible fog in the air that took open doors on both ends of it, and about an hour to dissipate well enough it was worth cleaning my glasses. That cannot be good for lungs either. For short term runs, say 15 minutes, it doesn't seem to do that. >> Some video would be educational to us. ;-) > >I'm just air cutting right now. I'll to take some video on my digital >camera this afteroon and then try to figger how to post it online. > >Mark > >--------------------------------------------------------------------------- >--- > >_______________________________________________ >Emc-users mailing list >[email protected] >https://lists.sourceforge.net/lists/listinfo/emc-users > -- 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) The only two things that motivate me and that matter to me are revenge and guilt. -- Elvis Costello ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
