
Gunsmithing & How To Pro, Amateur & WECSOG and Tutorials, Guides & OLL Build Instructions 

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#1




Milling an AR lower from solid, got Gcode?
anyone out there got CNC programs for milling AR lowers or uppers from solid on a 3axis mill? I'm thinking about trying this after the busy holidays. I looked into the 80% builds but I have CNC mills and lathes as well as 7050T7451 aluminum at my disposal so i figure what the hell, this should be a fun project.
If no one is willing to give up their programs, how about a solid model? (preferably Mastercam or IGES format). Oh and if you're concerned, no i'm not doing this as a business, for money we make aerospace parts and have no intention of making lowers for sale, just looking for a cool personal project. Thanks
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"Seems sick and it's hungry, it's tired and it's torn, It looks like it's dyin' and it's hardly been born" Bob Dylan "It's the end of the world as we know it...and I feel fine." R.E.M. Last edited by icentropy; 12172010 at 8:43 PM.. 
#3




this maybe useful
solidworks edrawings solid model .igs files blueprints http://www.cncguns.com/downloads.html 
#4




Oh man that's alot of g&m code haha. I have the solidworks of it somewhere but you can get it from cncguns too. Run a 1911 80% for me and ill sit there and write the g codes for the ar for you lol jk (maby)
I think the drilling fixtures you need to make will take more time then the actual frame. 
#5




would really like to see the end results make sure to take pics/video of it in process
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#6




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I think there are like 4 different operations you have to figure out. 
#7




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My family draws names for Christmas and then makes our gifts instead of buying them. This year I'm making my brother a replica of Blackjack's Mamba knife out of 440C. It's my first attempt at making a knife and I still have to carve the handles (found some nice wavy grained wood for that) and finish the edge, but not bad for my first knife. The hardest part was making the complex curves on the solid model. Since i have no grinders of this kind, and my hand grinding jobs on a belt sander bit the big one, i ended up profiling the entire blade surface on both sides. I have one more week to finish them
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"Seems sick and it's hungry, it's tired and it's torn, It looks like it's dyin' and it's hardly been born" Bob Dylan "It's the end of the world as we know it...and I feel fine." R.E.M. 
#8




Looks like a nice set of throwing knives.
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#10




can't find it, could you post a link?
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"Seems sick and it's hungry, it's tired and it's torn, It looks like it's dyin' and it's hardly been born" Bob Dylan "It's the end of the world as we know it...and I feel fine." R.E.M. 
#11




What control do you have on your mill. I think that will be important to know. Different controllers use different G/M code. So depending on your machine you might not be able to use someone else's code.
If you have the iges file and master cam it's not all that hard to punch one out. It is a lot of setups though. I think 7 or 8 total, pretty time consuming, but that's part of the fun. I made one before and that was enough. 80% have become way more affordable and more readily available. 
#12




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Mastercam X > gcode 
#13




This might also be helpful
http://arlower.rayvin.com/ar15/ 
#14




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Yeah, I can program, but i'm not our programmer so i'm not very proficient at it. We just got Catia with the prismatic machining plugin so this might be a fun way to learn to use it.
__________________
"Seems sick and it's hungry, it's tired and it's torn, It looks like it's dyin' and it's hardly been born" Bob Dylan "It's the end of the world as we know it...and I feel fine." R.E.M. 
#15




its posted on there but its linked to another site. here it is.
http://www.homegunsmith.com/cgibin/...;t=6103;st=150 
#17




Once you get into it, it's not that hard to understand how to create simple tool paths. The trick is fixturing, as in how to hold the parts during each operation. There is artistry in doing that well. Speeds (cutter or work rpm)and feeds (how fast the tool moves across the work), most efficient cutter to use, how much material to remove each path, those are also handy to know. CNC is so cool. I started a long time ago in a manual shop, still had some machines driven by leather belts.
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Don't be a Jake! It's a muzzle BRAKE, not a muzzle break. Or is your muzzle tired? 
#19




Don't bother with it. Too much work. Unless you have a lot of time to figure out how to hold your part. And how come everybody calls it g code when they are using cad/cam? I call it cam posts. When it is g code you actually write it out line by line. I don't think most people are writing code line by line on notepad.

#21




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Personally, I wouldn't ask for gcode, rather I'd ask for the CAD model and generate my own code to be sure it works on the machine I'll be using. While gcode is a standard, it's not really standard. Different controllers sometimes use different codes for the same operations or the same code may do different things. Also, some machines use I and J offsets for circular interpolation and some use a radius value. Even the I and J can be used differently. You'd also want to know whether the gcode is in absolute, incremental or both. Are there subprograms in the code? Fanuc Custom Macros? Heidenhain Q parameter? Actually, writing the gcode without a CAM system wouldn't be too difficult. After all, that's what we did before there were CAM systems!
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grym Lay me dun in the caul caul grun..... caput ferrum equus ego veho 
#22




I was talking about g&m code but was saying mastercam is so much easier... I rather use mastercam and draw my part with lines then do this again... All this code is for a bottom jaw that looks like a tombstone for a can crusher
THIS IS G&M code for whoever doesn't know. It's also why you don't wanna sit there and program any gun parts by hand. This part is a simple 3x4" park or something i dont remember I just pulled out a random one I finished. Programed for a HAAS and run on vericut % O4444 (G54) N1 G28 G91 Z0 N2 G00 G17 G20 G40 G49 G80 G90 M05 N3 T2 M06 (.5" END MILL) N4 G54 X4.5 Y4. S2400 M03 N5 G43 H02 Z.1 M08 N6 G01 Z0 F14. N7 M98 P1000 L17 N8 Z.1 N9 G00 G90 X.5 Y.5 N10 G01 Z0 F8. N11 M98 P2000 L5 N12 G28 G91 Z0 N13 G00 G17 G20 G40 G49 G80 G90 N14 T01 M06 (.5"SPOT DRILL) N15 G54 X3.5 Y.5 S2400 M03 N16 G43 H01 Z.1 M08 N17 G01 Z.130 F8. N18 M98 P3000 N19 G01 Z.150 F8. N20 M98 P3000 (CHAMFER SET RADIUS .050) N21 G28 G91 Z0 M09 N22 G00 G17 G20 G40 G49 G80 G90 M05 N23 M00 (G55) N24 G28 G91 Z0 N25 G00 G17 G20 G40 G49 G80 G90 N26 T02 M06 ( .5" END MILL) N27 G55 X4.5 Y4. S2400 M03 N28 G43 H02 Z.1 M08 N29 G01 Z.01 F14. N30 M98 P4000 L17 N280 G90 X4.5 Y4. N290 G01 Z.01 F14. N301 M98 P5000 L17 N31 G90 X4.5 Y4. N32 G01 Z0 F14. N33 M98 P1000 L17 N34 G90 X4.5 Y4. N35 G01 Z0 F8. N36 G28 G91 Z0 N37 G00 G17 G20 G40 G49 G80 G90 N38 T01 M06 (.5" SPOT DRILL) N39 G55 X3.5 Y.5 S2400 M03 N40 G43 H01 Z.1 M08 N41 G01 Z.080 F8. N42 M98 P3000 N43 G01 Z.10 F8. N44 M98 P3000 N45 G28 G91 Z0 N46 G00 G17 G20 G40 G49 G80 G90 N47 T05 M06 (.5" 135 DEGREE DRILL) N48 G55 X1.9375 Y.5630 S2400 M03 N49 G43 H05 Z.1 M08 N50 G99 G83 Z.4 Q.1388 R.050 P.01 F19. N51 G80 N52 G28 G91 Z0 N53 G00 G17 G20 G40 G49 G80 G90 N54 T02 M06 (.5" END MILL) N55 G55 X1.9375 Y.5630 S2400 M03 N56 G43 H02 Z.1 M08 N57 G13 Z.3 I.2 K.305 Q.1 D02 F8. N58 Z.1 N59 G13 Z.5 I.2 K.312 Q.1 D02 F8. N60 Z.1 N61 G28 G91 Z0 N62 G00 G17 G20 G40 G49 G80 G90 M05 N63 M00 (G56) N64 G28 G91 Z0 N65 G00 G17 G20 G40 G49 G80 G90 N66 T01 M06 (.5" SPOT DRILL) N67 G56 X.3125 Y.5 S2400 M03 N68 G43 H01 Z.1 M08 N69 G99 G82 Z.2 F14.P.03 R.2 N70 G80 Z.1 N71 G28 G91 Z0 N72 G00 G17 G20 G40 G49 G80 G90 N73 T03 M06 (#21 DRILL) N74 G56 X.3125 Y.5 S6000 M03 N75 G43 H03 Z.1 M08 N76 G99 G83 Z.7829 Q.0783 P.01 R.1 F17. N77 G80 Z.1 N78 G28 G91 Z0 N79 G00 G17 G20 G40 G49 G80 G90 N80 T04 M06 N81 G56 X.3125 Y.5 S200 N82 G43 H04 Z.1 M08 N83 G99 G84 Z.4750 R.1 F6.25 N84 G80 Z.1 N85 G28 G91 G49 Z0 M05 N86 M00 N87 G28 G91 Z0 N88 G00 G17 G20 G40 G49 G80 G90 N89 T01 M06 (.5" SPOT DRILL) N90 G56 X.3125 Y.5 S2400 M03 N91 G43 H01 Z.1 M08 N92 G99 G82 Z.2 F14.P.03 R.2 N93 G80 Z.1 N94 G28 G91 Z0 N95 G00 G17 G20 G40 G49 G80 G90 N96 T03 M06 (#21 DRILL) N97 G56 X.3125 Y.5 S6000 M03 N98 G43 H03 Z.1 M08 N99 G99 G83 Z.7829 Q.0783 P.01 R.1 F17. N100 G80 Z.1 N101 G28 G91 Z0 N102 G00 G17 G20 G40 G49 G80 G90 N103 T04 M06 N104 G56 X.3125 Y.5 S200 N105 G43 H04 Z.1 M08 N106 G99 G84 Z.4750 R.1 F6.25 N107 G80 Z.1 N108 G28 G91 G49 Z0 M05 N109 M30 o1000 (FACING) N100 G90 X.5 N101 Z.1 N102 G00 X4.5 N103 G01 Z0 F14. N104 G91 Y.25 N105 M99 o2000 (PERIMETER) N200 X.5 Y.5 N201 G01 G91 Z.202 F8. N202 G41 D02 G90 Y0 F14. N203 G90 X3.875 N204 Y.6250 N205 X3.2157 Y.9832 (5) N206 G03 X3.0683 Y1.321 R.3 (6) N207 G01 X3.3497 Y2.4231 (7) N208 G02 X3.1929 Y3.2542 R1. (8) N209 G01 X2.8365 Y3.75 N210 X1.0385 N211 X.6821 Y3.2542 (4) N212 G02 X.5253 Y2.4231 R1.(3) N213 G01 X.8067 Y1.3210 (2) N214 G03 X.6593 Y.9832 R.3 (1) N215 G01 X0 Y.6250 N216 Y.5 N217 G90 G40 X.5 Y.5 N218 M99 o3000 (CHAMFER) N300 G90 G41 D01 X3.875 F8. N301 Y.6250 N302 X3.2157 Y.9832 (5) N303 G03 X3.0683 Y1.321 R.3 (6) N304 G01 X3.3497 Y2.4231 (7) N305 G02 X3.1929 Y3.2542 R1. (8) N306 G01 X2.8365 Y3.750 N307 X1.0385 N308 X.6821 Y3.2542 (4) N309 G02 X.5253 Y2.4231R1.(3) N310 G01 X.8067 Y1.3210 (2) N311 G03 X.6593 Y.9832 R.3 (1) N312 G01 X0 Y.6250 N313 Y.5 N314 G90 G40 X.5 Y.5 N315 M99 o4000 N400 G90 X.5 N401 Z.1 N402 G00 X4.5 N403 G01 Z.1 F14. N404 G91 Y.25 N405 M99 o5000 N500 G90 X.5 N501 Z.1 N502 G00 X4.5 N503 G01 Z.01 F14. N504 G91 Y.25 N505 M99 % 
#24




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We use: AlphaCam SurfCam (my favorite) Gibbs Esprit Hypermill (the very best tool paths if you ask me) CamWorks SolidCam Some Flow waterjet software I've never used Fanuc Custom Macro B and plain old, hand generated gcode Gives a lot of options to get the job done. It's all good.
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grym Lay me dun in the caul caul grun..... caput ferrum equus ego veho 
#25




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I'm pretty rusty now a days and i'm sure advice is better given from someone else. I probably wouldn't even be able to get my toolpathing to work correctly at the moment. But I am HAAS certified if anyone thinks im bsing 
#26




**** grymster. That's a lot of cad/cam software. Our shop runs mastercam, surfcam, and geopath. When I started learning about writing g code by hand, the I and j values always effed me up. I wouldn't know if I had to use positive or negative values. I thought I was gonna go crazy. Thank god for cad/cam and igs files.

#27




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I used to have contests with other guys. See who could program bolt circles or Oring grooves or other features faster; me at the controller with my HP15C, or them using a CAM system. I won most of those. .... of course, with more complex geometry, you really need CAM. It's all fun stuff. Just wish I got to do it still.
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grym Lay me dun in the caul caul grun..... caput ferrum equus ego veho 
#28




Sitting at my desk right now programming a thirty two hour long milling operation for a mold. If I posted the code it would shut the forum down.
It sounds like everyone in here knows a bit about machining/programming but some sound slightly confused. GCode =GCode whether written via CAM Software or punched into the control by hand. If I'm not mistaken, Justin over at CNCGuns even posted his CAM files... I remember finding code, setup sheets and pretty sure the CAM files. There is a step by step showing of how he did his in the Projects section of his site. Definitely worth a look. 
#29




All this talk of writing out gcode for milling a lower from scratch makes me laugh. I am better than most at cartesian coordinates, and I can generate/read gcode, there is no way I would even think about trying to generate a 3d tool path for a lower. Could it be done, yes but it is not practical. This is my code for a 90's Fadal JUST FOR THE FCG. It's pretty long for how simple the geometry is but I was not especially concerned with cycle time or program size because I was only doing 2(Cycle time was about 20 minutes). Calculating all of the 3d points would take a team of skilled guys a long time.
% O1 (.25" DRILL PILOT) M6 T20 G0 G90 S5000 M3 E1 X1.5484 Y0 H20 M8 Z1. G83 G98 R0.1 Z1.4251 X1.5484 Y0 F30. Q0.1 G80 (.375" EM 2.625 REACH) M1 M5 M9 G0 G49 G90 Z0 M6 T21 G0 G90 S5000 M3 E1 X1.3684 Y0 H21 M8 Z1.5 G0 Z0.1 G1 Z0.063 F15. X2.0216 Y0.0287 F30. G3 X2.1607 Y0.0086 I0.1391 J0.241 G1 X2.1491 Y0.0086 X0.6988 Y0.0086 X2.1607 G3 X2.052 Y0.0859 I0.2307 J0.1556 G1 X2.3322 Y0.0566 G3 X2.2811 Y0.0781 I0.2768 J0.0279 G2 X2.2532 Y0.1354 I0.1526 J0.1099 G3 X2.2244 Y0.157 I0.0288 J0.0084 G1 X0.5804 G3 X0.5504 Y0.127 I0 J0.03 G1 Y0.127 G3 X0.5804 Y0.157 I0.03 J0 G1 X2.2244 G3 X2.2492 Y0.1439 I0 J0.03 G2 X2.4043 Y0.062 I0.1552 J0.1061 G1 X3.6559 Y0.0615 X3.6691 Y0.0579 X3.6765 Y0.0527 X3.6825 Y0.0445 X3.6856 Y0.0336 X3.6863 Y0.0241 X3.6843 Y0.0402 X3.6804 Y0.0483 X3.6721 Y0.0564 X3.662 Y0.0604 X3.6462 Y0.062 X3.0134 G3 X2.9971 Y0.0046 I0 J0.031 G2 X2.9958 Y0 I0.0013 J0.0021 G1 X2.4337 G2 X2.2811 Y0.0781 I0 J0.188 G3 X2.1621 Y0.1592 I0.2107 J0.1816 G1 X2.3342 Y0.0551 G3 X2.2832 Y0.0796 I0.2768 J0.0279 G2 X2.2556 Y0.1361 I0.1505 J0.1084 G3 X2.2244 Y0.1595 I0.0312 J0.0091 G1 X0.5804 G3 X0.5479 Y0.127 I0 J0.0325 G1 Y0.127 G3 X0.5804 Y0.1595 I0.0325 J0 G1 X2.2244 G3 X2.2512 Y0.1453 I0 J0.0325 G2 X2.4043 Y0.0645 I0.1532 J0.1047 G1 X3.6562 Y0.064 X3.6702 Y0.0602 X3.6783 Y0.0545 X3.6848 Y0.0456 X3.6881 Y0.0339 X3.6888 Y0.0243 X3.6867 Y0.0409 X3.6824 Y0.0498 X3.6735 Y0.0585 X3.6626 Y0.0629 X3.6463 Y0.0645 X3.0134 G3 X2.9958 Y0.0025 I0 J0.0335 G1 X2.4337 G2 X2.2832 Y0.0796 I0 J0.1855 G0 Z1.5 X1.3684 Y0 Z0.037 G1 Z0.126 F15. X2.0216 Y0.0287 F30. G3 X2.1607 Y0.0086 I0.1391 J0.241 G1 X2.1491 Y0.0086 X0.6988 Y0.0086 X2.1607 G3 X2.052 Y0.0859 I0.2307 J0.1556 G1 X2.3322 Y0.0566 G3 X2.2811 Y0.0781 I0.2768 J0.0279 G2 X2.2532 Y0.1354 I0.1526 J0.1099 G3 X2.2244 Y0.157 I0.0288 J0.0084 G1 X0.5804 G3 X0.5504 Y0.127 I0 J0.03 G1 Y0.127 G3 X0.5804 Y0.157 I0.03 J0 G1 X2.2244 G3 X2.2492 Y0.1439 I0 J0.03 G2 X2.4043 Y0.062 I0.1552 J0.1061 G1 X3.6559 Y0.0615 X3.6691 Y0.0579 X3.6765 Y0.0527 X3.6825 Y0.0445 X3.6856 Y0.0336 X3.6863 Y0.0241 X3.6843 Y0.0402 X3.6804 Y0.0483 X3.6721 Y0.0564 X3.662 Y0.0604 X3.6462 Y0.062 X3.0134 G3 X2.9971 Y0.0046 I0 J0.031 G2 X2.9958 Y0 I0.0013 J0.0021 G1 X2.4337 G2 X2.2811 Y0.0781 I0 J0.188 G3 X2.1621 Y0.1592 I0.2107 J0.1816 G1 X2.3342 Y0.0551 G3 X2.2832 Y0.0796 I0.2768 J0.0279 G2 X2.2556 Y0.1361 I0.1505 J0.1084 G3 X2.2244 Y0.1595 I0.0312 J0.0091 G1 X0.5804 G3 X0.5479 Y0.127 I0 J0.0325 G1 Y0.127 G3 X0.5804 Y0.1595 I0.0325 J0 G1 X2.2244 G3 X2.2512 Y0.1453 I0 J0.0325 G2 X2.4043 Y0.0645 I0.1532 J0.1047 G1 X3.6562 Y0.064 X3.6702 Y0.0602 X3.6783 Y0.0545 X3.6848 Y0.0456 X3.6881 Y0.0339 X3.6888 Y0.0243 X3.6867 Y0.0409 X3.6824 Y0.0498 X3.6735 Y0.0585 X3.6626 Y0.0629 X3.6463 Y0.0645 X3.0134 G3 X2.9958 Y0.0025 I0 J0.0335 G1 X2.4337 G2 X2.2832 Y0.0796 I0 J0.1855 G0 Z1.5 X1.3684 Y0 Z0.026 G1 Z0.189 F15. X2.0216 Y0.0287 F30. G3 X2.1607 Y0.0086 I0.1391 J0.241 G1 X2.1491 Y0.0086 X0.6988 Y0.0086 X2.1607 G3 X2.052 Y0.0859 I0.2307 J0.1556 G1 X2.3322 Y0.0566 G3 X2.2811 Y0.0781 I0.2768 J0.0279 G2 X2.2532 Y0.1354 I0.1526 J0.1099 G3 X2.2244 Y0.157 I0.0288 J0.0084 G1 X0.5804 G3 X0.5504 Y0.127 I0 J0.03 G1 Y0.127 G3 X0.5804 Y0.157 I0.03 J0 G1 X2.2244 G3 X2.2492 Y0.1439 I0 J0.03 G2 X2.4043 Y0.062 I0.1552 J0.1061 G1 X3.6559 Y0.0615 X3.6691 Y0.0579 X3.6765 Y0.0527 X3.6825 Y0.0445 X3.6856 Y0.0336 X3.6863 Y0.0241 X3.6843 Y0.0402 X3.6804 Y0.0483 X3.6721 Y0.0564 X3.662 Y0.0604 X3.6462 Y0.062 X3.0134 G3 X2.9971 Y0.0046 I0 J0.031 G2 X2.9958 Y0 I0.0013 J0.0021 G1 X2.4337 G2 X2.2811 Y0.0781 I0 J0.188 G3 X2.1621 Y0.1592 I0.2107 J0.1816 G1 X2.3342 Y0.0551 G3 X2.2832 Y0.0796 I0.2768 J0.0279 G2 X2.2556 Y0.1361 I0.1505 J0.1084 G3 X2.2244 Y0.1595 I0.0312 J0.0091 G1 X0.5804 G3 X0.5479 Y0.127 I0 J0.0325 G1 Y0.127 G3 X0.5804 Y0.1595 I0.0325 J0 G1 X2.2244 G3 X2.2512 Y0.1453 I0 J0.0325 G2 X2.4043 Y0.0645 I0.1532 J0.1047 G1 X3.6562 Y0.064 X3.6702 Y0.0602 X3.6783 Y0.0545 X3.6848 Y0.0456 X3.6881 Y0.0339 X3.6888 Y0.0243 X3.6867 Y0.0409 X3.6824 Y0.0498 X3.6735 Y0.0585 X3.6626 Y0.0629 X3.6463 Y0.0645 X3.0134 G3 X2.9958 Y0.0025 I0 J0.0335 G1 X2.4337 G2 X2.2832 Y0.0796 I0 J0.1855 G0 Z1.5 X1.3684 Y0 Z0.089 G1 Z0.252 F15. X2.0216 Y0.0287 F30. G3 X2.1607 Y0.0086 I0.1391 J0.241 G1 X2.1491 Y0.0086 X0.6988 Y0.0086 X2.1607 G3 X2.052 Y0.0859 I0.2307 J0.1556 G1 X2.3322 Y0.0566 G3 X2.2811 Y0.0781 I0.2768 J0.0279 G2 X2.2532 Y0.1354 I0.1526 J0.1099 G3 X2.2244 Y0.157 I0.0288 J0.0084 G1 X0.5804 G3 X0.5504 Y0.127 I0 J0.03 G1 Y0.127 G3 X0.5804 Y0.157 I0.03 J0 G1 X2.2244 G3 X2.2492 Y0.1439 I0 J0.03 G2 X2.4043 Y0.062 I0.1552 J0.1061 G1 X3.6559 Y0.0615 X3.6691 Y0.0579 X3.6765 Y0.0527 X3.6825 Y0.0445 X3.6856 Y0.0336 X3.6863 Y0.0241 X3.6843 Y0.0402 X3.6804 Y0.0483 X3.6721 Y0.0564 X3.662 Y0.0604 X3.6462 Y0.062 X3.0134 G3 X2.9971 Y0.0046 I0 J0.031 G2 X2.9958 Y0 I0.0013 J0.0021 G1 X2.4337 G2 X2.2811 Y0.0781 I0 J0.188 G3 X2.1621 Y0.1592 I0.2107 J0.1816 G1 X2.3342 Y0.0551 G3 X2.2832 Y0.0796 I0.2768 J0.0279 G2 X2.2556 Y0.1361 I0.1505 J0.1084 G3 X2.2244 Y0.1595 I0.0312 J0.0091 G1 X0.5804 G3 X0.5479 Y0.127 I0 J0.0325 G1 Y0.127 G3 X0.5804 Y0.1595 I0.0325 J0 G1 X2.2244 G3 X2.2512 Y0.1453 I0 J0.0325 G2 X2.4043 Y0.0645 I0.1532 J0.1047 G1 X3.6562 Y0.064 X3.6702 Y0.0602 X3.6783 Y0.0545 X3.6848 Y0.0456 X3.6881 Y0.0339 X3.6888 Y0.0243 X3.6867 Y0.0409 X3.6824 Y0.0498 X3.6735 Y0.0585 X3.6626 Y0.0629 X3.6463 Y0.0645 X3.0134 G3 X2.9958 Y0.0025 I0 J0.0335 G1 X2.4337 G2 X2.2832 Y0.0796 I0 J0.1855 G0 Z1.5 X1.3684 Y0 Z0.152 G1 Z0.315 F15. X2.0216 Y0.0287 F30. 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X2.0216 Y0.0287 F30. G3 X2.1607 Y0.0086 I0.1391 J0.241 Last edited by Lostsheep; 12202010 at 9:04 AM.. 
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#31




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X1.4565 Y0.0049 F20. G3 X1.5484 Y0.0295 I0.0919 J0.1591 Y0.0295 I0 J0.0295 G1 X1.1804 G3 Y0.0295 I0 J0.0295 G1 X1.5484 X1.4565 Y0.0069 G3 X1.5484 Y0.0315 I0.0919 J0.1592 Y0.0315 I0 J0.0315 G1 X1.1804 G3 Y0.0315 I0 J0.0315 G1 X1.5484 X1.3684 Y0 Z1.319 F10. X1.4565 Y0.0049 F20. G3 X1.5484 Y0.0295 I0.0919 J0.1591 Y0.0295 I0 J0.0295 G1 X1.1804 G3 Y0.0295 I0 J0.0295 G1 X1.5484 X1.4565 Y0.0069 G3 X1.5484 Y0.0315 I0.0919 J0.1592 Y0.0315 I0 J0.0315 G1 X1.1804 G3 Y0.0315 I0 J0.0315 G1 X1.5484 X1.3684 Y0 Z1.35 F10. X1.4565 Y0.0049 F20. G3 X1.5484 Y0.0295 I0.0919 J0.1591 Y0.0295 I0 J0.0295 G1 X1.1804 G3 Y0.0295 I0 J0.0295 G1 X1.5484 X1.4565 Y0.0069 G3 X1.5484 Y0.0315 I0.0919 J0.1592 Y0.0315 I0 J0.0315 G1 X1.1804 G3 Y0.0315 I0 J0.0315 G1 X1.5484 X1.4565 Y0.0089 G3 X1.5484 Y0.0335 I0.0919 J0.1592 Y0.0335 I0 J0.0335 G1 X1.1804 G3 Y0.0335 I0 J0.0335 G1 X1.5484 G0 Z0.5 M5 M9 G0 G49 G90 Z0 E0 X0 Y0 M6 T20 M2 % 
#32




Quote:
And yeah if i do do this i would only consider using some sort of CAM software for the bulk of it. I mean hand writing Gcode for some holes or simple parts is one thing, but doing it for something like the external profile of a milspec lower is ridiculous.
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#33




Quote:
I've never really looked at an AR lower, but I have a model and it seems pretty orthogonal. Don't see where a bunch of surfacing is required. Most of the program you posted looks like roughing passes. Is that correct?
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#35




Quote:
As for surfacing, the rounded and raised ribs around the mag release and mag well could be done with corner rounders but I am too lazy to do that. Cncguns.com has an awesome sequence of pictures showing all of the 3d roughing and 3d surfacing that he did. (http://www.cncguns.com/projects/ar15lower.html) I would attack the problem in a similar fashion. I don't really like corner rounders, they are a little bit of a PITA to get dialed in. I have less blending issues when I just surface stuff. Quote:
Edit: There's plenty more where that came from!!! 
#37




Quote:
The code is very long but it gave me good results. I was concerned about chattering and breaking the only long 3/8ths endmill that I had. You can see it in the code but for those less familiar with g code, I was running 30 ipm @ 5000rpm and 1/16" z steps. I could get the program shorter but until I am running lots of them I am not too worried about it. 
#39




Quote:
Yeah I mainly use geopath. But my father uses mastercam for 3D stuff on the Komo. I'm trying to talk him into getting a 5axis machine tool so I can start learning how to 3D. This community college by me has these Mastercam courses that really caught my attention. I'm always trying to learn more and more about machining. Lostsheep I've never messed with fadal controls. Any pros and cons over other controls? I've always used Fanuc, haas, and yasnac. Nice code. Super long. I think my cam post is a little shorter. I didn't make too many Z moves. Maybe 5 steps all the way to depth for my FCP. Still though, only took like 1517 minutes from part in to part out.
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