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(mmount.ngc - sample program)
(this program mills a stepper motor mount)
(it is intended to be run on the Mazak at the CNC workshop)
(it requires the custom 3-station workholding fixture that is on that machine)
(station 1 starts with a flat rectangular blank, and makes holes in it)
(station 1 uses the G55 coordinate system)
(touch off: XY = center of 1.876 hole, Z = top of plate)
(station 2 mounts the part using a couple of the holes, and mills the outline)
(station 2 uses the G56 coordinate system)
(touch off: XY = center of 1.876 hole, Z = top of plate)
(station 3 mounts the part on end to drill, tap, and c'bore holes in one end)
(station 3 uses the G57 coordinate system)
(touch off: XZ = center of 1.876 hole, Y = back surface of plate)
(it uses the following tools:)
(1 1 -1.1901 0.250 3/4 center drill)
(2 2 -0.2875 0.209 #4 tap drill)
(3 3 0.0 0.1406 9/64 clearance drill)
(4 4 -1.6630 0.25 1/4 end mill)
(5 5 -1.5042 0.5 1/2 end mill)
(15 15 -1.5042 0.55 same 1/2 end mill oversize roughing)
(6 6 -0.1833 0.25 1/4-20 pulley tap)
#100=10.0 (outside feed)
#101=10.0 (inside feed)
#102=3.0 (drill feed)
G17 G20 G40 G90
o100 sub
(helical hole milling, load tool and set feed first, then use like so:)
(o100 call [x pos] [y pos] [safety height] [hole depth] [hole dia] [tool dia])
(tool dia doesn't have to be specified exactly.)
#9=#5 (save real dia)
#5=[#5-.020]
#4=[0 - #4]
#7=[#6 / 2] (#7 is depth per circle = half of tool diameter)
#8=[#3 - #7] (#8 is current depth step)
g0 z#3
(start above and right so we make a convex corner for entry to the ccw arcs)
g0 x[#1 + #6] y[#2 + [#5]]
g41 g0 x#1 y[#2 + [#5 / 2]]
o101 while [#8 GT #4]
(down toward the specified depth a bit at a time)
g3 x#1 y[#2 + [#5 / 2]] i0 j[0 - [#5 / 2]] z#8
#8=[#8 - #7]
o101 endwhile
(down to the actual depth)
g3 x#1 y[#2 + [#5 / 2]] i0 j[0 - [#5 / 2]] z#4
(full circle at the actual depth)
g3 x#1 y[#2 + [#5 / 2]] i0 j[0 - [#5 / 2]]
(now make a finish pass at the actual diameter)
g3 x#1 y[#2 - [#9 / 2]] i0 j[0 - [[#5 + #9]/4]]
g3 x#1 y[#2 - [#9 / 2]] i0 j[#9/2]
g3 x#1 y[#2 + [#5 / 2]] i0 j[[#5+#9]/4]
g0 z#3
g40
o100 endsub
(DRILL 3/4 CENTER)
T1 M6 G43
G55
S764 M3 M8
G00 X0.0000 Y0.0000
G00 Z0.2500
(spot five holes in station 1)
G81 R0.0250 Z-0.0400 X0.0000 Y-6.0000 F#102
G81 R0.0250 Z-0.0400 X0.0000 Y-7.0000 F#102
G81 R0.0250 Z-0.0400 X0.0000 Y-3.5000 F#102
G81 R0.0250 Z-0.0400 X0.0000 Y-2.5000 F#102
G81 R0.0250 Z-0.0400 X-1.938 Y-8.9000 F#102
G00 Z0.2500
M5 M9
G00 G53 Z0.0000
(MILL 0.250)
T4 M6 G43
(station 1)
G55
S3056 M3 M8
G00 X0.0000 Y0.0000
G00 Z0.2500
(mill curved slot)
G00 X-0.1806 Y-11.4324
G41
G01 X-0.1806 Y-11.1824 F#101
G03 X0.3449 Y-10.6567 I-1.7574 J2.2824 Z0.025
G03 X0.1221 Y-10.4853 I-0.1114 J0.0857 Z0.0
G02 X-0.3521 Y-10.9596 I-2.0601 J1.5853 Z-0.125
G03 X-0.1806 Y-11.1824 I0.0858 J-0.1114
G03 X0.3449 Y-10.6567 I-1.7574 J2.2824
G03 X0.1221 Y-10.4853 I-0.1114 J0.0857
G02 X-0.3521 Y-10.9596 I-2.0601 J1.5853 Z-0.250
G03 X-0.1806 Y-11.1824 I0.0858 J-0.1114
G03 X0.3449 Y-10.6567 I-1.7574 J2.2824
G03 X0.1221 Y-10.4853 I-0.1114 J0.0857
G02 X-0.3521 Y-10.9596 I-2.0601 J1.5853 Z-0.375
G03 X-0.1806 Y-11.1824 I0.0858 J-0.1114
G03 X0.3449 Y-10.6567 I-1.7574 J2.2824
G03 X0.1221 Y-10.4853 I-0.1114 J0.0857
G02 X-0.3521 Y-10.9596 I-2.0601 J1.5853 Z-0.550
G03 X-0.1806 Y-11.1824 I0.0858 J-0.1114
G03 X0.3449 Y-10.6567 I-1.7574 J2.2824
G03 X0.1221 Y-10.4853 I-0.1114 J0.0857
G02 X-0.3521 Y-10.9596 I-2.0601 J1.5853
G00 Z0.2500
G40
(mill second curved slot)
G00 X1.5152 Y-8.4181
G41
G01 X1.7652 Y-8.4181 Z0.025
G02 X1.7652 Y-9.3819 I-3.7032 J-0.4819 Z-0.125
G03 X2.0440 Y-9.4181 I0.1394 J-0.0181
G03 X2.0440 Y-8.3819 I-3.9820 J0.5181
G03 X1.7652 Y-8.4181 I-0.1394 J-0.0181
G02 X1.7652 Y-9.3819 I-3.7032 J-0.4819 Z-0.250
G03 X2.0440 Y-9.4181 I0.1394 J-0.0181
G03 X2.0440 Y-8.3819 I-3.9820 J0.5181
G03 X1.7652 Y-8.4181 I-0.1394 J-0.0181
G02 X1.7652 Y-9.3819 I-3.7032 J-0.4819 Z-0.375
G03 X2.0440 Y-9.4181 I0.1394 J-0.0181
G03 X2.0440 Y-8.3819 I-3.9820 J0.5181
G03 X1.7652 Y-8.4181 I-0.1394 J-0.0181
G02 X1.7652 Y-9.3819 I-3.7032 J-0.4819 Z-0.550
G03 X2.0440 Y-9.4181 I0.1394 J-0.0181
G03 X2.0440 Y-8.3819 I-3.9820 J0.5181
G03 X1.7652 Y-8.4181 I-0.1394 J-0.0181
G02 X1.7652 Y-9.3819 I-3.7032 J-0.4819
G00 Z0.2500
G40
(mill four holes)
o100 call [ 1.1880] [-0.9380] [0.25] [0.55] [0.4375] [0.25]
o100 call [-1.1880] [-0.9380] [0.25] [0.55] [0.4375] [0.25]
o100 call [ 0.0000] [-7.5000] [0.25] [0.55] [0.5000] [0.25]
o100 call [ 0.0000] [-1.4000] [0.25] [0.55] [0.5000] [0.25]
G00 G53 Z0.0000
(station 3)
G57
G0 X0.0000 Y0.0000
(counterbores)
(o100 call [x pos] [y pos] [safety height] [hole depth] [hole dia] [tool dia])
F#101
o100 call [1.188] [-0.250] [1.4] [-0.367] [0.405] [0.25]
F[#101/3] (mostly plunging)
o100 call [1.188] [-0.250] [1.4] [-0.267] [0.2813] [0.25]
F#101
o100 call [-1.188] [-0.250] [1.4] [-0.367] [0.405] [0.25]
F[#101/3] (mostly plunging)
o100 call [-1.188] [-0.250] [1.4] [-0.267] [0.2813] [0.25]
M5 M9
G00 G53 Z0.0000
(DRILL 9/32)
T3 M6 G43
G55
S679 M3 M8
G00 X0.0000 Y0.0000
G00 Z0.2500
G83 R0.050 Z-0.6000 Q.15 X-1.9380 Y-8.9000 F#102
G00 G53 Z0.0000
G57
G00 X0.0000 Y0.0000
G00 Z1.5000
G83 R1.5000 Z-0.100 Q.15 X1.1880 Y-0.2500 F#102
G83 R1.5000 Z-0.100 Q.15 X-1.1880 Y-0.2500 F#102
M5 M9
G00 G53 Z0.0000
(DRILL #4)
T2 M6 G43
G55
S914 M3 M8
G00 X0.0000 Y0.0000
G00 Z0.2500
G83 R0.050 Z-0.7000 Q0.15 X0.0000 Y-7.0000 F#102
G83 R0.050 Z-0.7000 Q0.15 X0.0000 Y-6.0000 F#102
G83 R0.050 Z-0.7000 Q0.15 X0.0000 Y-3.5000 F#102
G83 R0.050 Z-0.7000 Q0.15 X0.0000 Y-2.5000 F#102
G00 G53 Z0.0000
(drill at station 3)
G57
G00 X0.0000 Y0.0000
G00 Z1.5000
G00 X-1.188 Y-0.250
G00 Z0.500
G83 R0.500 Z-0.938 Q0.15 F#102
G00 Z1.5000
G00 X1.188 Y-0.250
G00 Z0.500
G83 R0.500 Z-0.938 Q0.15 F#102
M5 M9
G00 G53 Z0.0000
(MILL 0.500)
T5 M6 G43
S1527 M3 M8
G55
G00 X0 Y0
G00 Z0.2500
F#100
(two large holes - turn the slugs into chips so they don't get caught)
(o100 call [x pos] [y pos] [safety height] [hole depth] [hole dia] [tool dia])
o100 call [0.0000] [0.0000] [0.25] [0.6] [1.000] [0.5]
o100 call [0.0000] [0.0000] [0.25] [0.6] [1.876] [0.5]
o100 call [0.0000] [-8.900] [0.25] [0.6] [1.00] [0.5]
o100 call [0.0000] [-8.900] [0.25] [0.6] [2.00] [0.5]
G00 G53 Z0.0000
(station 2 - milling the perimeter)
G56
(first notch - to allow scrap to drop away)
G00 X0 Y0
G00 X-3.75 Y-8.9
G00 Z0.25
G01 Z-0.25
G01 X-2.9 Y-8.9
G00 Z0.25
G00 X-3.75 Y-8.9
G01 Z-0.6
G01 X-2.9 Y-8.9
G00 Z0.25
(2nd drop notch)
G00 X-3.75 Y0.5
G01 Z-0.25
G01 X-2 Y0.5
G00 Z0.25
G00 X-3.75 Y0.5
G01 Z-0.6
G01 X-2 Y0.5
G00 Z0.25
(3rnd drop notch)
G00 X0 Y2.75
G01 Z-0.25
G01 X0 Y1.75
G00 Z0.25
G00 X0 Y2.75
G01 Z-0.6
G01 X0 Y1.75
G00 Z0.25
(beginning of profile)
G00 G53 Z0.0000
G00 X0 Y0
G00 Z0.2500
G00 X-1.6732 Y1.0677
G41 D15 (oversize tool diameter)
G03 X-0.6423 Y1.0677 I0.5154 J0.8569 Z-0.2500 F#100
G02 X0.6423 Y1.0677 I0.6423 J-1.0677
G01 X1.4775 Y0.5653
G02 X1.5976 Y0.3739 I-0.1289 J-0.2142
G01 X2.4036 Y-8.3886
G02 X2.4046 Y-8.4115 I-0.2489 J-0.0229
G01 X2.4046 Y-9.4000
G02 X2.2096 Y-9.7962 I-0.5000 J0.0000
G01 X0.0386 Y-11.4672
G02 X-0.6625 Y-11.3760 I-0.3050 J0.3962
G01 X-2.3342 Y-9.2050
G02 X-2.4359 Y-8.8548 I0.3962 J0.3050
G01 X-1.5975 Y0.3737
G02 X-1.4774 Y0.5653 I0.2490 J-0.0226
G01 X-0.6423 Y1.0677
G02 X0.6423 Y1.0677 I0.6423 J-1.0677 Z-0.6000
G01 X1.4775 Y0.5653
G02 X1.5976 Y0.3739 I-0.1289 J-0.2142
G01 X2.4036 Y-8.3886
G02 X2.4046 Y-8.4115 I-0.2489 J-0.0229
G01 X2.4046 Y-9.4000
G02 X2.2096 Y-9.7962 I-0.5000 J0.0000
G01 X0.0386 Y-11.4672
G02 X-0.6625 Y-11.3760 I-0.3050 J0.3962
G01 X-2.3342 Y-9.2050
G02 X-2.4359 Y-8.8548 I0.3962 J0.3050
G01 X-1.5975 Y0.3737
G02 X-1.4774 Y0.5653 I0.2490 J-0.0226
G01 X-0.6423 Y1.0677
G02 X0.6423 Y1.0677 I0.6423 J-1.0677
G00 Z0.2500
G40
G00 X-1.6732 Y1.0677
G41 D5
G03 X-0.6423 Y1.0677 I0.5154 J0.8569 Z-0.6000 F#100
G02 X0.6423 Y1.0677 I0.6423 J-1.0677
G01 X1.4775 Y0.5653
G02 X1.5976 Y0.3739 I-0.1289 J-0.2142
G01 X2.4036 Y-8.3886
G02 X2.4046 Y-8.4115 I-0.2489 J-0.0229
G01 X2.4046 Y-9.4000
G02 X2.2096 Y-9.7962 I-0.5000 J0.0000
G01 X0.0386 Y-11.4672
G02 X-0.6625 Y-11.3760 I-0.3050 J0.3962
G01 X-2.3342 Y-9.2050
G02 X-2.4359 Y-8.8548 I0.3962 J0.3050
G01 X-1.5975 Y0.3737
G02 X-1.4774 Y0.5653 I0.2490 J-0.0226
G01 X-0.6423 Y1.0677
G01 X-0.2248 Y1.3189 (continue past edge)
G00 Z0.2500
G40
M5 M9
G00 G53 Z0.0000
(TAP PULLEY 1/4-20)
T6 M6 G43
S200 M3 M8
G55
G00 X0.0000 Y0.0000
G00 Z0.2500
G00 X0.0000 Y-7.0000
G33.1 Z-0.95 K0.05
G00 X0.0000 Y-6.0000
G33.1 Z-0.95 K0.05
G00 X0.0000 Y-3.5000
G33.1 Z-0.95 K0.05
G00 X0.0000 Y-2.5000
G33.1 Z-0.95 K0.05
G00 G53 Z0.0000
G57
G00 X0.0000 Y0.0000
G00 Z1.5000
G00 X1.1880 Y-0.2500
G33.1 Z-1.0 K0.05
G00 X-1.1880 Y-0.2500
G33.1 Z-1.0 K0.05
M5 M9
G00 G53 Z0.0000
T0 M6 G49
M02
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