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DIY CNC Fusion 360 CAM posts processor

This is modified fork of https://github.com/martindb/mpcnc_posts_processor

CAM posts processor for use with Fusion 360 and MPCNC with RAMPS or any 3-axis DIY CNC. Supported firmwares:

  • Marlin 2.0
  • Repetier firmware 1.0.3 (not tested. gcode is same as for Marlin)
  • GRBL 1.1
  • RepRap firmware (Duet3d)

Some design points:

  • Setup operation types: Milling, Water/Laser/Plasma
  • Support MM and Inches units (but all properties MUST be set in MM)
  • XY and Z independent travel speeds. Rapids are done with G0.
  • Arcs support on XY plane (Marlin/Repetier/RepRap) or all panes (Grbl)
  • Tested with LCD display and SD card (built in tool change require printing from SD and LCD to restart)
  • Support for 3 different laser power using "cutting modes" (through, etch, vaporize)
  • Support 2 coolant channels. You may attach relays to control external devices - as example air jet valve.
  • Customizable level of verbosity of comments
  • Support line numbers
  • Support GRBL laser mode (be noted that you probably to have enabled laser mode $32=1)

screenshot

User Properties

Group 1: Job propertyes

Title Description Default
Job: Firmware Target firmware (marlin 2.0 or Repetir 1.0.3 / GRBL 1.1) / RepRap Firmware. Marlin
Job: Travel Speed XY High speed for travel movements X & Y (mm/min). 2500 mm/min
Job: Travel Speed Z High speed for travel movements Z (mm/min). 300 mm/min
Job: Marlin: Manual Spindle On/Off Set it to true when the motor of your spindle is controlled by manual switch. So the preprocessor will issue additional pauses for TURN ON/TURN OFF the motor. true
Job: Marlin: Enforce feedrate Add feedrate to each movement g-code. false
Job: Use Arcs Use G2/G3 g-codes fo circular movements. true
Job: Reset on start (G92) Set origin when gcode start (G92 X0 Y0 Z0). Only apply if not using gcodeStartFile. true
Job: Goto 0 at end Go X0 Y0 at gcode end. Useful to find if your machine loss steeps or have any other mechanic issue (like loose pulleys). Also useful for repetitive jobs. Only apply if not using gcodeStopFile. true
Job: Use Arcs Use G2/G3 g-codes fo circular movements. true
Job: Line numbers Show sequence numbers. false
Job: Line start First sequence number. 10
Job: Line increment Increment for sequence numbers. 1
Job: Separate words Specifies that the words should be separated with a white space. true
Job: Duet: Milling Mode GCode command to setup Duet3d milling mode. "M453 P2 I0 R30000 F200"
Job: Duet: Laser Mode GCode command to setup Duet3d laser mode. "M452 P2 I0 R255 F200"

Group 2: Tool change

Title Description Default
Change: Enabled Enable tool change code (bultin tool change requires LCD display) true
Change: X X position for builtin tool change 0
Change: Y Y position for builtin tool change 0
Change: Z Z position for builtin tool change 40
Change: Make Z Probe Z probe after tool change true
Change: Disable Z stepper Disable Z stepper when change a tool false

Group 3: Z Probe

Title Description Default
Probe: On job start Execute probe gcode on job start true
Probe: Plate thickness Plate thickness 0.8
Probe: Use Home Z Use G28 or G38 for probing true
Probe: G38 target Probing up to Z position -10
Probe: G38 speed Probing with speed 30

Group 4: Laser/Plasma related

Title Description Default Values
Laser: On - Vaporize Persent of power to turn on the laser/plasma cutter in vaporize mode 100
Laser: On - Through Persent of power to turn on the laser/plasma cutter in through mode 80
Laser: On - Etch Persent of power to turn on the laser/plasma cutter in etch mode 40
Laser: Marlin mode Marlin mode of the laser/plasma cutter () M106 M106 S{PWM}/M107 = 0; M3 O{PWM}/M5 = 1; M42 P{pin} S{PWM} = 2;
Laser: Marlin pin Marlin custom pin number for the laser/plasma cutter 4
Laser: GRBL mode GRBL mode of the laser/plasma cutter M4 M4 S{PWM}/M5 dynamic power = 4; M3 S{PWM}/M5 static power = 3;

Group 5: Override behaviour by external files

Title Description Default
Extern: Start File File with custom Gcode for header/start (in nc folder)
Extern: Stop File File with custom Gcode for footer/end (in nc folder)
Extern: Tool File File with custom Gcode for tool change (in nc folder)
Extern: Probe File File with custom Gcode for tool probe (in nc folder)

Group 6: Manage coolant control pins

Title Description Default Values
Coolant: A Mode Enable issuing g-codes for control Coolant channel A 0 off=0; flood=1; mist=2; throughTool=3; air=4; airThroughTool=5; suction=6; floodMist=7; floodThroughTool=8
Coolant: A Marlin On command GCode command to turn on Coolant channel A M42 P11 S255
Coolant: A Marlin Off command Gcode command to turn off Coolant A M42 P11 S0
Coolant: A GRBL GRBL g-codes for control Coolant channel A M7 M7 flood = 7; M8 mist = 8
Coolant: B Mode Enable issuing g-codes for control Coolant channel B 0 off=0; flood=1; mist=2; throughTool=3; air=4; airThroughTool=5; suction=6; floodMist=7; floodThroughTool=8
Coolant: B Marlin On command GCode command to turn on Coolant channel B M42 P6 S255
Coolant: B Marlin Off command Gcode command to turn off Coolant channel B M42 P6 S0
Coolant: B GRBL GRBL g-codes for control Coolant channel B M8 M7 flood = 7; M8 mist = 8

Group 7: Write comments into g-code

Title Description Default
Comment: Write Tools Write table of used tools in job header true
Comment: Sections Write header of every section true
Comment: Activities Write comments which somehow helps to understand current piece of g-code true
Comment: Trace Commands Write stringified commands called by CAM true
Comment: Trace Movements Write stringified movements called by CAM true

Sample of issued code blocks

Gcode of milling with manually control spindel

;Fusion 360 CAM 2.0.4860
; Posts processor: MPCNC_Mill_Laser.cps
; Gcode generated: Sunday, December 2, 2018 1:57:21 PM GMT
; Document: cam_testpp v5
; Setup: Setup1
; 
; Ranges table:
; X: Min=2.588 Max=36 Size=33.412
; Y: Min=2.588 Max=36 Size=33.412
; Z: Min=-1 Max=15 Size=16
; 
; Tools table:
; T1 D=3.175 CR=0 - ZMIN=-1 - flat end mill
; T2 D=1.5 CR=0 - ZMIN=-1 - flat end mill

; *** START begin ***
G90
G21
M84 S0
G92 X0 Y0 Z0
; COMMAND_TOOL_MEASURE
; --- PROBE TOOL begin ---
M0 Attach ZProbe
G28 Z
G92 Z0.8
G0 Z50 F300
M0 Detach ZProbe
; --- PROBE TOOL end ---
; *** START end ***

; *** SECTION begin ***
;2D Contour1 - Milling - Tool: 1 - 1/8inch flat end mill
; X Min: 2.588 - X Max: 49.412
; Y Min: 2.588 - Y Max: 49.412
; Z Min: -1 - Z Max: 15
M400
; COMMAND_START_SPINDLE
; COMMAND_SPINDLE_CLOCKWISE
M0 Turn ON spindle
; COMMAND_COOLANT_ON
M117 2D Contour1
G0 Z15
G0 X49.412 Y26 F2500
G0 Z5 F300
; MOVEMENT_PLUNGE
G1 Z1 F100
G1 Z-1
; 14
G1 Y49.412 F300
G1 X2.588
G1 Y2.588
G1 X49.412
G1 Y26
; MOVEMENT_RAPID
G0 Z15
; *** SECTION end ***

; *** SECTION begin ***
;2D Contour2 - Milling - Tool: 1 - 1/8inch flat end mill
; X Min: 9.587 - X Max: 42.412
; Y Min: 9.587 - Y Max: 42.412
; Z Min: -1 - Z Max: 15
M400
; COMMAND_START_SPINDLE
; COMMAND_SPINDLE_CLOCKWISE
; COMMAND_COOLANT_ON
M117 2D Contour2
G0 Z15 F300
G0 X42.412 Y26 F2500
G0 Z5 F300
; MOVEMENT_PLUNGE
G1 Z1 F100
G1 Z-1
; 14
G1 Y42.412 F300
G1 X9.587
G1 Y9.587
G1 X42.412
G1 Y26
; MOVEMENT_RAPID
G0 Z15
; *** SECTION end ***

; *** SECTION begin ***
; --- CHANGE TOOL begin ---
; COMMAND_COOLANT_OFF
M400
M300 S400 P2000
G0 Z50 F300
G0 X0 Y0 F2500
; COMMAND_STOP_SPINDLE
M0 Turn OFF spindle
M0 Put tool 2 - 1.5mm
; COMMAND_TOOL_MEASURE
; --- PROBE TOOL begin ---
M0 Attach ZProbe
G28 Z
G92 Z0.8
G0 Z50 F300
M0 Detach ZProbe
; --- PROBE TOOL end ---
; --- CHANGE TOOL end ---
;Trace1 - Milling - Tool: 2 - 1.5mm flat end mill
; X Min: 16 - X Max: 36
; Y Min: 16 - Y Max: 36
; Z Min: -1 - Z Max: 15
M400
; COMMAND_START_SPINDLE
; COMMAND_SPINDLE_CLOCKWISE
M0 Turn ON spindle
; COMMAND_COOLANT_ON
M117 Trace1
G0 Z15
G0 X36 Y36 F2500
G0 Z4 F300
; MOVEMENT_LEAD_IN
G1 Z-1 F300
; MOVEMENT_CUTTING
G1 Y16
G1 X16
G1 Y36
G1 X36
; MOVEMENT_LEAD_OUT
G1 Z4
; MOVEMENT_RAPID
G0 Z15
; *** SECTION end ***

; *** STOP begin ***
M400
; COMMAND_COOLANT_OFF
; COMMAND_STOP_SPINDLE
M0 Turn OFF spindle
G0 X0 Y0 F2500
M117 Job end
; *** STOP end ***

Gcode of milling with spindel controlled by M3/M4/M5

;Fusion 360 CAM 2.0.4860
; Posts processor: MPCNC_Mill_Laser.cps
; Gcode generated: Sunday, December 2, 2018 1:56:26 PM GMT
; Document: cam_testpp v5
; Setup: Setup1
; 
; Ranges table:
; X: Min=2.588 Max=36 Size=33.412
; Y: Min=2.588 Max=36 Size=33.412
; Z: Min=-1 Max=15 Size=16
; 
; Tools table:
; T1 D=3.175 CR=0 - ZMIN=-1 - flat end mill
; T2 D=1.5 CR=0 - ZMIN=-1 - flat end mill

; *** START begin ***
G90
G21
M84 S0
G92 X0 Y0 Z0
; COMMAND_TOOL_MEASURE
; --- PROBE TOOL begin ---
M0 Attach ZProbe
G28 Z
G92 Z0.8
G0 Z50 F300
M0 Detach ZProbe
; --- PROBE TOOL end ---
; *** START end ***

; *** SECTION begin ***
;2D Contour1 - Milling - Tool: 1 - 1/8inch flat end mill
; X Min: 2.588 - X Max: 49.412
; Y Min: 2.588 - Y Max: 49.412
; Z Min: -1 - Z Max: 15
M400
; COMMAND_START_SPINDLE
; COMMAND_SPINDLE_CLOCKWISE
; >>> Spindle Speed 21000
M3 S21000
; COMMAND_COOLANT_ON
M117 2D Contour1
G0 Z15
G0 X49.412 Y26 F2500
G0 Z5 F300
; MOVEMENT_PLUNGE
G1 Z1 F100
G1 Z-1
; 14
G1 Y49.412 F300
G1 X2.588
G1 Y2.588
G1 X49.412
G1 Y26
; MOVEMENT_RAPID
G0 Z15
; *** SECTION end ***

; *** SECTION begin ***
;2D Contour2 - Milling - Tool: 1 - 1/8inch flat end mill
; X Min: 9.587 - X Max: 42.412
; Y Min: 9.587 - Y Max: 42.412
; Z Min: -1 - Z Max: 15
M400
; COMMAND_START_SPINDLE
; COMMAND_SPINDLE_CLOCKWISE
; >>> Spindle Speed 20000
M3 S20000
; COMMAND_COOLANT_ON
M117 2D Contour2
G0 Z15 F300
G0 X42.412 Y26 F2500
G0 Z5 F300
; MOVEMENT_PLUNGE
G1 Z1 F100
G1 Z-1
; 14
G1 Y42.412 F300
G1 X9.587
G1 Y9.587
G1 X42.412
G1 Y26
; MOVEMENT_RAPID
G0 Z15
; *** SECTION end ***

; *** SECTION begin ***
; --- CHANGE TOOL begin ---
; COMMAND_COOLANT_OFF
M400
M300 S400 P2000
G0 Z50 F300
G0 X0 Y0 F2500
; COMMAND_STOP_SPINDLE
M5
M0 Put tool 2 - 1.5mm
; COMMAND_TOOL_MEASURE
; --- PROBE TOOL begin ---
M0 Attach ZProbe
G28 Z
G92 Z0.8
G0 Z50 F300
M0 Detach ZProbe
; --- PROBE TOOL end ---
; --- CHANGE TOOL end ---
;Trace1 - Milling - Tool: 2 - 1.5mm flat end mill
; X Min: 16 - X Max: 36
; Y Min: 16 - Y Max: 36
; Z Min: -1 - Z Max: 15
M400
; COMMAND_START_SPINDLE
; COMMAND_SPINDLE_CLOCKWISE
; >>> Spindle Speed 21000
M3 S21000
; COMMAND_COOLANT_ON
M117 Trace1
G0 Z15
G0 X36 Y36 F2500
G0 Z4 F300
; MOVEMENT_LEAD_IN
G1 Z-1 F300
; MOVEMENT_CUTTING
G1 Y16
G1 X16
G1 Y36
G1 X36
; MOVEMENT_LEAD_OUT
G1 Z4
; MOVEMENT_RAPID
G0 Z15
; *** SECTION end ***

; *** STOP begin ***
M400
; COMMAND_COOLANT_OFF
; COMMAND_STOP_SPINDLE
M5
G0 X0 Y0 F2500
M117 Job end
; *** STOP end ***

Gcode of milling with spindel controlled by M3/M4/M5 with using Coolants (both A and B channels)

;Fusion 360 CAM 2.0.4860
; Posts processor: MPCNC_Mill_Laser.cps
; Gcode generated: Sunday, December 2, 2018 2:06:54 PM GMT
; Document: cam_testpp v5
; Setup: Setup1
; 
; Ranges table:
; X: Min=2.588 Max=36 Size=33.412
; Y: Min=2.588 Max=36 Size=33.412
; Z: Min=-1 Max=15 Size=16
; 
; Tools table:
; T1 D=3.175 CR=0 - ZMIN=-1 - flat end mill
; T2 D=1.5 CR=0 - ZMIN=-1 - flat end mill

; *** START begin ***
G90
G21
M84 S0
G92 X0 Y0 Z0
; COMMAND_TOOL_MEASURE
; --- PROBE TOOL begin ---
M0 Attach ZProbe
G28 Z
G92 Z0.8
G0 Z50 F300
M0 Detach ZProbe
; --- PROBE TOOL end ---
; *** START end ***

; *** SECTION begin ***
;2D Contour1 - Milling - Tool: 1 - 1/8inch flat end mill
; X Min: 2.588 - X Max: 49.412
; Y Min: 2.588 - Y Max: 49.412
; Z Min: -1 - Z Max: 15
M400
; COMMAND_START_SPINDLE
; COMMAND_SPINDLE_CLOCKWISE
; >>> Spindle Speed 21000
M3 S21000
; COMMAND_COOLANT_ON
; >>> Coolant A ON
M42 P11 S255
M117 2D Contour1
G0 Z15
G0 X49.412 Y26 F2500
G0 Z5 F300
; MOVEMENT_PLUNGE
G1 Z1 F100
G1 Z-1
; 14
G1 Y49.412 F300
G1 X2.588
G1 Y2.588
G1 X49.412
G1 Y26
; MOVEMENT_RAPID
G0 Z15
; *** SECTION end ***

; *** SECTION begin ***
;2D Contour2 - Milling - Tool: 1 - 1/8inch flat end mill
; X Min: 9.587 - X Max: 42.412
; Y Min: 9.587 - Y Max: 42.412
; Z Min: -1 - Z Max: 15
M400
; COMMAND_START_SPINDLE
; COMMAND_SPINDLE_CLOCKWISE
; >>> Spindle Speed 20000
M3 S20000
; COMMAND_COOLANT_ON
; >>> Coolant A OFF
M42 P11 S0
; >>> Coolant B ON
M42 P6 S255
M117 2D Contour2
G0 Z15 F300
G0 X42.412 Y26 F2500
G0 Z5 F300
; MOVEMENT_PLUNGE
G1 Z1 F100
G1 Z-1
; 14
G1 Y42.412 F300
G1 X9.587
G1 Y9.587
G1 X42.412
G1 Y26
; MOVEMENT_RAPID
G0 Z15
; *** SECTION end ***

; *** SECTION begin ***
; --- CHANGE TOOL begin ---
M400
G0 Z50 F300
G0 X0 Y0 F2500
; COMMAND_COOLANT_OFF
; >>> Coolant B OFF
M42 P6 S0
; COMMAND_STOP_SPINDLE
M5
M300 S400 P2000
M0 Put tool 2 - 1.5mm
; COMMAND_TOOL_MEASURE
; --- PROBE TOOL begin ---
M0 Attach ZProbe
G28 Z
G92 Z0.8
G0 Z50 F300
M0 Detach ZProbe
; --- PROBE TOOL end ---
; --- CHANGE TOOL end ---
;Trace1 - Milling - Tool: 2 - 1.5mm flat end mill
; X Min: 16 - X Max: 36
; Y Min: 16 - Y Max: 36
; Z Min: -1 - Z Max: 15
M400
; COMMAND_START_SPINDLE
; COMMAND_SPINDLE_CLOCKWISE
; >>> Spindle Speed 21000
M3 S21000
; COMMAND_COOLANT_ON
M117 Trace1
G0 Z15
G0 X36 Y36 F2500
G0 Z4 F300
; MOVEMENT_LEAD_IN
G1 Z-1 F300
; MOVEMENT_CUTTING
G1 Y16
G1 X16
G1 Y36
G1 X36
; MOVEMENT_LEAD_OUT
G1 Z4
; MOVEMENT_RAPID
G0 Z15
; *** SECTION end ***

; *** STOP begin ***
M400
; COMMAND_COOLANT_OFF
; COMMAND_STOP_SPINDLE
M5
G0 X0 Y0 F2500
M117 Job end
; *** STOP end ***

Gcode of laser cutting

;Fusion 360 CAM 2.0.4860
; Posts processor: MPCNC_Mill_Laser.cps
; Gcode generated: Sunday, December 2, 2018 2:07:32 PM GMT
; Document: cam_testpp v5
; Setup: Setup2
; 
; Ranges table:
; X: Min=-25 Max=25 Size=50
; Y: Min=-25.5 Max=25 Size=50.5
; Z: Min=0 Max=15 Size=15
; 
; Tools table:
; T1 D=0 CR=0 - ZMIN=0 - laser cutter

; *** START begin ***
G90
G21
M84 S0
G92 X0 Y0 Z0
; COMMAND_TOOL_MEASURE
; *** START end ***

; *** SECTION begin ***
;2D Profile1 - Laser/Plasma - Cutting mode: auto
; X Min: -25 - X Max: 25
; Y Min: -25.5 - Y Max: 25
; Z Min: 0 - Z Max: 15
M400
; COMMAND_START_SPINDLE
; COMMAND_SPINDLE_COUNTERCLOCKWISE
; COMMAND_COOLANT_ON
M117 2D Profile1
G0 Z15 F300
G0 X-9.94 Y-10.5 F2500
G0 Z0 F300
; >>> LASER Power ON
M106 S200
; COMMAND_POWER_ON
; MOVEMENT_LEAD_IN
G1 Y-10 F1000
G1 X-9.95
; MOVEMENT_CUTTING
G1 X-10
G1 Y10
G1 X10
G1 Y-10
G1 X-9.95
; MOVEMENT_LEAD_OUT
G1 X-9.96
G1 Y-10.5
; >>> LASER Power OFF
M107
; COMMAND_POWER_OFF
; MOVEMENT_RAPID
G0 Z5 F300
G0 X-9.99 Y-25.5 F2500
G0 Z0 F300
; >>> LASER Power ON
M106 S200
; COMMAND_POWER_ON
; MOVEMENT_LEAD_IN
G1 Y-25 F1000
G1 X-10
; MOVEMENT_CUTTING
G1 X-25
G1 Y25
G1 X25
G1 Y-25
G1 X-10
; MOVEMENT_LEAD_OUT
G1 X-10.01
G1 Y-25.5
; >>> LASER Power OFF
M107
; COMMAND_POWER_OFF
; MOVEMENT_RAPID
G0 Z15 F300
; *** SECTION end ***

; *** STOP begin ***
M400
; COMMAND_COOLANT_OFF
; COMMAND_STOP_SPINDLE
G0 X0 Y0 F2500
M117 Job end
; *** STOP end ***

Resorces

Marlin G-codes

PostProcessor Class Reference

Post Processor Training Guide (PDF document)

Enhancements to the post processor property definitions

Dumper PostProcessor

Library of exist post processors

Post processors forum

How to set up a 4/5 axis machine configuration

Beginners Guide to Editing Post Processors in Fusion 360! FF121 (Youtube video)