Post processor feed rate problem

[edvinas232]

Hello, I have plasma table running on mach3. Fusion 360 do not have official mach3 jet/plasma post processor. I found on forum some one made custom post processor and it almost work for me. The problem is feed rate. This post makes sometimes feed rate at 0 and I can not find in code there are the problem. I attach example g code with feed rate problem and post processor file.

N10 G71
N15 G90

(Contour1)
N20 M6 T1
N25 G54
N30 M9
N40 G0 X3.49 Y29.732
N50 G1 F300.
N55 G31 Z-100
N60 G92 Z 1
N65 G0 Z 1
N70 M3
N75 G4 P 1
N80 G0 Z 1
N85 G41 D1
N90 X4.238 Y29.675 F0.
N95 X4.985 Y29.617
N100 G3 X-4.985 Y30.383 I-4.985 J0.383
N105 X4.985 Y29.617 I4.985 J-0.383
N110 G1 X4.497 Y30.187
N115 X4.009 Y30.756
N120 M5
N125 G0 Z 2
N130 X4.009 Y30.756 F300.
N135 X-13.617 Y14.321
N140 G31 Z-100
N145 G92 Z 1
N150 G0 Z 1
N155 M3
N160 G4 P 1
N165 G0 Z 1
N170 G41 D1
N175 X-13.042 Y14.803 F0.
N180 X-12.468 Y15.286
N185 G3 X-15.532 Y12.714 I-1.532 J-1.286
N190 X-12.468 Y15.286 I1.532 J1.286
N195 G1 X-13.215 Y15.351
N200 X-13.962 Y15.416
N205 M5
N210 G0 Z 2
N215 X-13.962 Y15.416 F300.
N220 X13.617 Y14.321
N225 G31 Z-100
N230 G92 Z 1
N235 G0 Z 1
N240 M3
N245 G4 P 1
N250 G0 Z 1
N255 G41 D1
N260 X13.042 Y14.803 F0.
N265 X12.468 Y15.286
N270 G3 X15.532 Y12.714 I1.532 J-1.286
N275 X12.468 Y15.286 I-1.532 J1.286
N280 G1 X12.533 Y14.538
N285 X12.599 Y13.791
N290 M5
N295 G0 Z 2
N300 X12.599 Y13.791 F300.
N305 X13.553 Y-13.776
N310 G31 Z-100
N315 G92 Z 1
N320 G0 Z 1
N325 M3
N330 G4 P 1
N335 G0 Z 1
N340 G41 D1
N345 X12.883 Y-13.44 F0.
N350 X12.212 Y-13.103
N355 G3 X15.788 Y-14.897 I1.788 J-0.897
N360 X12.212 Y-13.103 I-1.788 J0.897
N365 G1 X12.449 Y-13.815
N370 X12.685 Y-14.527
N375 M5
N380 G0 Z 2
N385 X12.685 Y-14.527 F300.
N390 X-14.104 Y-13.511
N395 G31 Z-100
N400 G92 Z 1
N405 G0 Z 1
N410 M3
N415 G4 P 1
N420 G0 Z 1
N425 G41 D1
N430 X-14.261 Y-12.778 F0.
N435 X-14.418 Y-12.044
N440 G3 X-13.582 Y-15.956 I0.418 J-1.956
N445 X-14.418 Y-12.044 I-0.418 J1.956
N450 G1 X-14.826 Y-12.674
N455 X-15.233 Y-13.303
N460 M5
N465 G0 Z 2
N470 X-15.233 Y-13.303 F300.
N475 X-2.399 Y-32.548
N480 G31 Z-100
N485 G92 Z 1
N490 G0 Z 1
N495 M3
N500 G4 P 1
N505 G0 Z 1
N510 G41 D1
N515 X-2.914 Y-33.094 F0.
N520 X-3.428 Y-33.64
N525 G3 X3.428 Y-26.36 I3.428 J3.64
N530 X-3.428 Y-33.64 I-3.428 J-3.64
N535 G1 X-2.678 Y-33.618
N540 X-1.928 Y-33.595
N545 M5
N550 G0 Z 2
N555 X-1.928 Y-33.595 F300.
N560 X5. Y-20.
N565 G31 Z-100
N570 G92 Z 1
N575 G0 Z 1
N580 M3
N585 G4 P 1
N590 G0 Z 1
N595 G41 D1
N600 X4.262 Y-20.135 F0.
N605 X3.525 Y-20.27
N610 G3 X6.475 Y-19.73 I1.475 J0.27
N615 X3.525 Y-20.27 I-1.475 J-0.27
N620 G1 X4.142 Y-20.696
N625 X4.759 Y-21.122
N630 M5
N635 G0 Z 2
N640 X4.759 Y-21.122 F300.
N645 X-5. Y-20.
N650 G31 Z-100
N655 G92 Z 1
N660 G0 Z 1
N665 M3
N670 G4 P 1
N675 G0 Z 1
N680 G41 D1
N685 X-4.83 Y-20.731 F0.
N690 X-4.66 Y-21.461
N695 G3 X-5.34 Y-18.539 I-0.34 J1.461
N700 X-4.66 Y-21.461 I0.34 J-1.461
N705 G1 X-4.264 Y-20.824
N710 X-3.867 Y-20.188
N715 M5
N720 G0 Z 2
N725 X-3.867 Y-20.188 F300.
N730 X-0.584 Y-8.48
N735 G31 Z-100
N740 G92 Z 1
N745 G0 Z 1
N750 M3
N755 G4 P 1
N760 G0 Z 1
N765 G41 D1
N770 X-0.636 Y-9.228 F0.
N775 X-0.687 Y-9.976
N780 G3 X0.687 Y9.976 I0.687 J9.976
N785 X-0.687 Y-9.976 I-0.687 J-9.976
N790 G1 X-0.122 Y-9.484
N795 X0.444 Y-8.991
N800 M5
N805 G0 Z 2
N810 X0.444 Y-8.991 F300.
N815 X51.061 Y-48.939
N820 G31 Z-100
N825 G92 Z 1
N830 G0 Z 1
N835 M3
N840 G4 P 1
N845 G0 Z 1
N850 G41 D1
N855 X50.53 Y-49.47 F0.
N860 X50. Y-50.
N865 X-50.
N870 Y50.
N875 X50.
N880 Y-50.
N885 Y-50.75
N890 Y-51.5
N895 M5
N900 G0 Z 2
N905 X50. Y-51.5 F300.

N915 M30

[Stuart-H]

scratching the old noggin

line 50 of your code has G1 F300 

that is the feed rate unless i have missed something 

[LibertyMachine]

Line 90 has a feedrate of zero. Every G1 move after a G41 line is a feedrate of zero

[edvinas232]

Yes and I cant find problem. Also feed rated from cam menu not do anything.

[Stuart-H]

My bad 🤡

Must go go to spec savers ( U.K. Optician)

are learn more g gode

were the ek did I put mr Smids book

[edvinas232]

With other post processor(torch mate3)  also feed rate zero. I looked around in program settings but cant find anything wrong. Any ideas ?

[Steinwerks]

The problem as I see it is actually related to the Fusion 360 output. There are only four locations in the Dump that relay feed information (three with an actual feedrate) and none of them seem to be called by either of the post processors I've tried (plasma specifically):

64: onParameter('operation:tool_feedCutting', 40)
66: onParameter('operation:tool_feedEntry', 40)
68: onParameter('operation:tool_feedExit', 40)

There's that section, and then this line:

currentSection.feedMode=0

According to the Post Processor Help file though, the 'feed' output is part of all the toolpath functions as "onLinear (Number x, Number y, Number z, Number feed)" as well as the onCircular, and 5-axis outputs as well.

Here's what the dumper is reporting is being output in my test file:

176: onMovement(MOVEMENT_LEAD_IN /*lead in*/)
176: onRadiusCompensation()
  radiusCompensation=RADIUS_COMPENSATION_LEFT // left
176: onLinear(-2.8300001489834523, 3.099999915896438, 0, 0)
177: onLinear(-2.8300001489834523, 3.0800000889094794, 0, 0)
178: onCircular(false, -2.749999939926027, 3.0800000889094794, 0, -2.749999939926027, 2.9999998798520546, 0, 0)
  sweep: 90deg
  radius: 0.08
179: onMovement(MOVEMENT_CUTTING /*cutting*/)
179: onLinear(2.749999939926027, 2.9999998798520546, 0, 0)
180: onCircular(true, 2.749999939926027, 2.749999939926027, 0, 2.9999998798520546, 2.749999939926027, 0, 0)
  sweep: 90deg
  radius: 0.25
181: onLinear(2.9999998798520546, -2.749999939926027, 0, 0)
182: onCircular(true, 2.749999939926027, -2.749999939926027, 0, 2.749999939926027, -2.9999998798520546, 0, 0)
  sweep: 90deg
  radius: 0.25
183: onLinear(-2.749999939926027, -2.9999998798520546, 0, 0)
184: onCircular(true, -2.749999939926027, -2.749999939926027, 0, -2.9999998798520546, -2.749999939926027, 0, 0)
  sweep: 90deg
  radius: 0.25
185: onLinear(-2.9999998798520546, 2.749999939926027, 0, 0)
186: onCircular(true, -2.749999939926027, 2.749999939926027, 0, -2.749999939926027, 2.9999998798520546, 0, 0)
  sweep: 90deg
  radius: 0.25
187: onMovement(MOVEMENT_LEAD_OUT /*lead out*/)
187: onCircular(false, -2.749999939926027, 3.0800000889094794, 0, -2.670000031238466, 3.0800000889094794, 0, 0)
  sweep: 90deg
  radius: 0.08
188: onLinear(-2.670000031238466, 3.099999915896438, 0, 0)
189: onLinear(-2.670000031238466, 3.12000004325326, 0, 0)
190: onPower(false)
190: onCommand(COMMAND_POWER_OFF)
191: onMovement(MOVEMENT_RAPID /*rapid*/)

The last value in all the onLinear and onCircular parentheses should be outputting the feedrate, as that's what's called in the toolpath (as seen in the onParameter values) but it's outputting a value of zero.

This isn't a post issue, it's a Fusion issue and needs to be fixed ASAP as far as I'm concerned, although today being the day before a US national holiday I wouldn't count on a response until Monday.

@al.whatmough @paul.clauss @xander.luciano

[paul.clauss]

Hi @Steinwerks,

Thanks for the post! You are correct - this is a known bug that will be addressed in the December update of Fusion 360. Until then, I would recommend hard coding a value for the feed rate.

Let me know if you have any questions!