New codes for use in RRC3.3 M3,M4,M5

[Handymanpa54]

I found some M codes I'd like to use but how? What output will they control? I have a Duet 2 Ethernet. Maybe these codes are only for Duet 3 Mainboard 6HC??
I have my Duet 2 Ethernet controlling the axis on my CNC and I'm working on getting the Spindle to go. I bought one of those PWM to variable voltage out boards. I was reading the link on the forum about that. I was looking into Gcodes and Mcodes on how to run it.
What about M3, M4, and M5??
I found M950. Can this be assigned to any output? (Like E0 or E1)
My 2.2KW spindle has a max RPM of 24,000. At the moment I have a PWM to 0 to 10Volt converter board hooked to the AIN.
I'd like to try sending a trial code to see it turn on just to get a response. Then I could put that into the config.g file if it works.

Mark

code_text
M950 R0 C"!exp.heater3" L12000 ; Spindle 0 uses exp.heater3 as RPM pin and has a max RPM of 12000

Mark

[cjm]

As you’ve already figured out, M950 allows one of the PWM capable pins on the Duet2 to be designated as the input to a PWM to analogue converter board for spindle RPM control. However, not all Duet2 pins are PWM capable so it’s best to refer to the Duet2 wiring diagram to check. IIRC various of the fan pins as well as the heated bed and extruder heater outputs are PWM capable.

With RRF3.3 and newer firmware, once the spindle control pin has been defined using M950, you then assign it to a tool using M563 and enable CNC mode, like this, for example:

M950 R0 C"exp.13" Q2000 L0:20000   ; Create spindle index 0, PWM frequency 2KHz, 
                                                  ; Lmin:max rpm ranges from 0rpm at PWM=0% to 20000rpm at 100% PWM
                                                  ; spindle speed PWM pin	: exp.13 
 
M563 P0 R0 S"Spindle"                             ; Create Tool 0 with Spindle 0 and call it Spindle
T0						  ; Select Tool 0 (or make sure generated by CAM)
 
; CNC Mode
M453

After this a M3 S8000 command will set the spindle RPM to 8000 rpm (for example) and M3 S0 stops the spindle. It’s possible that M5 may also stop the spindle with this setup but I haven’t checked this, so someone else would need to comment.

However, if your spindle VFD has a RUN input, then M950 can be used to define a Duet pin to control the RUN state and in this case the M5 command can definitely be used to stop the spindle:

M950 R0 C"exp.13+exp.8" Q2000 L0:20000   ; Create spindle index 0, PWM frequency 2KHz, 
                                                  ; Lmin:max rpm ranges from 0rpm at PWM=0% to 20000rpm at 100% PWM
                                                  ; spindle speed PWM pin	: exp.13 
                                                  ; spindle run pin 		: exp.8

If your VFD has a DIR input then M950 can also be used to configure a pin for this too:

M950 R0 C"exp.13+exp.8+exp.14" Q2000 L0:20000   ; Create spindle index 0, PWM frequency 2KHz, 
                                                  ; Lmin:max rpm ranges from 0rpm at PWM=0% to 20000rpm at 100% PWM
                                                  ; spindle speed PWM pin	: exp.13 
                                                  ; spindle run pin 		: exp.8
                                                  ; spindle direction pin 	: exp.14

With the DIR pin connected, M3 S8000 runs the spindle in a clockwise direction at 8000rpm and M4 S8000 runs the spindle at 8000rpm in a counterclockwise direction.

A couple of other points to note:

A) VFDs generally require higher control voltages than the Duet outputs provide, so some extra circuitry (e.g relays or opto-isolators) is needed to match the Duet control outputs to the VFD inputs

B) Some VFDs have FWD and REV inputs instead of RUN and DIR inputs. In my case (an “AskPower” unit from eBay) I found that wiring RUN -> FWD and DIR -> REV worked fine. However, this may not be a universal solution.

Edit 7/8/2021 - Closing quotation marks corrected - thanks to @Wurke for spotting this.

[Handymanpa54]

@cjm Hello CJM,
This is exactly what I needed. When you dive into unfamiliar territory it's good to have and idea whats going on.
Thanks so much!

[cjm]

@handymanpa54 Happy to help. Let us all know how you get on…

[Wurke]

This post is deleted!

[Wurke]

@cjm This is really useful. I've done this but the spindle doesn't show in DWC under the spindles pane? Should it or is there more that needs configuring?

I'm starting a fresh with a Duet WiFi so I've updated it to RRF 3.3, updated the DWC to the CNC version and my config is almost completely blank except the above code and the network configs.

[cjm]

@bonjipoo As mentioned eslewhere, if you're using the CNC version of DWC then I believe this is a known issue that @sindarius plans to fix.

https://forum.duet3d.com/topic/20416/preview-version-of-cnc-optimized-dwc/143?_=1628279224253

[Sindarius]

@cjm said in New codes for use in RRC3.3 M3,M4,M5:

@bonjipoo As mentioned eslewhere, if you're using the CNC version of DWC then I believe this is a known issue that @sindarius plans to fix.

https://forum.duet3d.com/topic/20416/preview-version-of-cnc-optimized-dwc/143?_=1628279224253

As @cjm mentioned it is an issue that I need to address. I believe there were some OM changes that happened which caused the panel to not show the spindles anymore. I am working on a fix for this issue.

[Handymanpa54]

@cjm said in New codes for use in RRC3.3 M3,M4,M5:

C"exp.13"

Hello CJM,

I have things hooked up properly and I think I have code in Config.g proper, but no signal out to the PWM converter board. I checked with an O-scope. I tried sending M3 P0 S2000. No response.

code_text
; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Fri Jul 30 2021 11:14:49 GMT-0400 (Eastern Daylight Time)
 
; General preferences
 
G90                                                ; send absolute coordinates...
M83                                                ; ...but relative extruder moves
M550 P"CNC 6040"                                   ; set printer name
 
; Network
M552 P192.168.1.14 S1                              ; enable network and set IP address
M553 P255.255.255.0                                ; set netmask
M554 P192.168.1.2                                  ; set gateway
M586 P0 S1                                         ; enable HTTP
M586 P1 S0                                         ; disable FTP
M586 P2 S0                                         ; disable Telnet
 
; Drives
M569 P0 S1                                         ; physical drive 0 goes forwards
M569 P1 S1                                         ; physical drive 1 goes forwards
M569 P2 S1                                         ; physical drive 2 goes forwards
M569 P3 S1                                         ; physical drive 3 goes forwards
M584 X0 Y1 Z2 E3                                   ; set drive mapping
M350 X16 Y16 Z16 E16 I1                            ; configure microstepping with interpolation
M92 X640.00 Y640.00 Z640.00 E420.00                ; set steps per mm
M566 X400.00 Y400.00 Z80.00 E120.00                ; set maximum instantaneous speed changes (mm/min)
M203 X2500.00 Y2500.00 Z240.00 E1200.00            ; set maximum speeds (mm/min)
M201 X300.00 Y300.00 Z20.00 E250.00                ; set accelerations (mm/s^2)
M906 X1300 Y1300 Z1300 E500 I30                    ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                            ; Set idle timeout
 
; Axis Limits
M208 X0 Y0 Z0 S1                                   ; set axis minima
M208 X390 Y590 Z68 S0                              ; set axis maxima
 
; Endstops
M574 X1 S1 P"^xstop"                               ; configure active-high endstop for low end on X via pin ^xstop
M574 Y1 S1 P"^ystop"                               ; configure active-high endstop for low end on Y via pin ^ystop
M574 Z1 S1 P"^zstop"                               ; configure active-high endstop for low end on Z via pin ^zstop
 
; Z-Probe
M558 P0 H5 F120 T6000                              ; disable Z probe but set dive height, probe speed and travel speed
M557 X15:215 Y15:195 S20                           ; define mesh grid
 
 
M950 R0 C"exp.heater4" Q2000 L0:24000   					; Create spindle index 0, PWM frequency 2KHz, 
                                                  ; Lmin:max rpm ranges from 0rpm at PWM=0% to 24000rpm at 100% PWM
                                                  ; spindle speed PWM pin	: exp.13 
M563 P0 R0 S"Spindle"                             ; Create Tool 0 with Spindle 0 and call it Spindle
 
T0						  							; Select Tool 0 (or make sure generated by CAM)
 
 
 
 
 
M453												; CNC Mode
; Heaters
;M308 S0 P"bedtemp" Y"thermistor" T100000 B4138     ; configure sensor 0 as thermistor on pin bedtemp
;M950 H0 C"bedheat" T0                              ; create bed heater output on bedheat and map it to sensor 0
;M307 H0 B1 S1.00                                   ; enable bang-bang mode for the bed heater and set PWM limit
;M140 H0                                            ; map heated bed to heater 0
;M143 H0 S120                                       ; set temperature limit for heater 0 to 120C
;M308 S1 P"e0temp" Y"thermistor" T100000 B4138      ; configure sensor 1 as thermistor on pin e0temp
;M950 H1 C"e0heat" T1                               ; create nozzle heater output on e0heat and map it to sensor 1
;M307 H1 B0 S1.00                                   ; disable bang-bang mode for heater  and set PWM limit
;M143 H1 S280                                       ; set temperature limit for heater 1 to 280C
 
; Fans
;M950 F0 C"fan0" Q500                               ; create fan 0 on pin fan0 and set its frequency
;M106 P0 S0 H-1                                     ; set fan 0 value. Thermostatic control is turned off
;M950 F1 C"fan1" Q500                               ; create fan 1 on pin fan1 and set its frequency
;M106 P1 S1 H1 T45                                  ; set fan 1 value. Thermostatic control is turned on
 
; Tools
M563 P0 S"CNC6040" D0 H1 F0                        ; define tool 0
M453 S0 C"out1" R24000 Q100 T0
M563 S"XYZ-Probe" P1                    ; define XYZ Touch Probe tool 1
G10 P0 X0 Y0 Z0                                    ; set tool 0 axis offsets
G10 P0 R0 S0                                       ; set initial tool 0 active and standby temperatures to 0C
 
; Custom settings are not defined
 
; Miscellaneous
M575 P1 S1 B57600                                  ; enable support for PanelDue
M501                                               ; load saved parameters from non-volatile memory
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss
                                                 ; select first tool
 
 

code_text
8/9/2021, 7:11:15 PM 	m122
=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 3.3 (2021-06-15 21:44:54) running on Duet Ethernet 1.02 or later
Board ID: 0JD0M-9P6B2-NJ4S4-6JTD2-3S46K-KU0LM
Used output buffers: 1 of 24 (13 max)
=== RTOS ===
Static ram: 23876
Dynamic ram: 70264 of which 0 recycled
Never used RAM 20276, free system stack 150 words
Tasks: NETWORK(ready,25.2%,237) HEAT(delaying,0.0%,390) Move(notifyWait,0.1%,309) MAIN(running,74.6%,449) IDLE(ready,0.2%,29), total 100.0%
Owned mutexes:
=== Platform ===
Last reset 00:08:25 ago, cause: power up
Last software reset at 2021-08-09 18:46, reason: User, GCodes spinning, available RAM 20276, slot 1
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0041f000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x00
Aux0 errors 0,0,0
Step timer max interval 0
MCU temperature: min 28.9, current 39.7, max 40.2
Supply voltage: min 23.8, current 23.8, max 23.9, under voltage events: 0, over voltage events: 0, power good: yes
Heap OK, handles allocated/used 0/0, heap memory allocated/used/recyclable 0/0/0, gc cycles 0
Driver 0: position 0, standstill, SG min/max 0/1023
Driver 1: position 0, standstill, SG min/max 0/1023
Driver 2: position 0, standstill, SG min/max not available
Driver 3: position 0, standstill, SG min/max not available
Driver 4: position 0, standstill, SG min/max not available
Driver 5: position 0
Driver 6: position 0
Driver 7: position 0
Driver 8: position 0
Driver 9: position 0
Driver 10: position 0
Driver 11: position 0
Date/time: 2021-08-09 19:11:12
Cache data hit count 4294967295
Slowest loop: 9.14ms; fastest: 0.14ms
I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0
=== Storage ===
Free file entries: 10
SD card 0 detected, interface speed: 20.0MBytes/sec
SD card longest read time 3.3ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 83, maxWait 490658ms, bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves 5, completed moves 5, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters = -1 -1 -1 -1, chamberHeaters = -1 -1 -1 -1
=== GCodes ===
Segments left: 0
Movement lock held by null
HTTP is idle in state(s) 0
Telnet is idle in state(s) 0
File is idle in state(s) 0
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
Daemon is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty.
=== Network ===
Slowest loop: 14.94ms; fastest: 0.02ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions
HTTP sessions: 1 of 8
Interface state active, link 100Mbps full duplex

[cjm]

@handymanpa54
I notice you have two M563 commands defining the spindle.
Perhaps try removing the second one, because I think this might redefine tool 0 and so disconnect it from the spindle?

M563 P0 S"CNC6040" D0 H1 F0 ; define tool 0

[Handymanpa54]

@cjm
I trimmed the code and have one instance of M563. Still no luck. Maybe it's easier to get an output on Fan0 output?
I'm wondering if I can get an output off of the fan connectors or E0 Heater connector? Using the expansion connector is not so easy.

My config.g

code_text
; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Fri Jul 30 2021 11:14:49 GMT-0400 (Eastern Daylight Time)
 
; General preferences
 
G90                                                ; send absolute coordinates...
M83                                                ; ...but relative extruder moves
M550 P"CNC 6040"                                   ; set printer name
 
; Network
M552 P192.168.1.14 S1                              ; enable network and set IP address
M553 P255.255.255.0                                ; set netmask
M554 P192.168.1.2                                  ; set gateway
M586 P0 S1                                         ; enable HTTP
M586 P1 S0                                         ; disable FTP
M586 P2 S0                                         ; disable Telnet
 
; Drives
M569 P0 S1                                         ; physical drive 0 goes forwards
M569 P1 S1                                         ; physical drive 1 goes forwards
M569 P2 S1                                         ; physical drive 2 goes forwards
M569 P3 S1                                         ; physical drive 3 goes forwards
M584 X0 Y1 Z2 E3                                   ; set drive mapping
M350 X16 Y16 Z16 E16 I1                            ; configure microstepping with interpolation
M92 X640.00 Y640.00 Z640.00 E420.00                ; set steps per mm
M566 X400.00 Y400.00 Z80.00 E120.00                ; set maximum instantaneous speed changes (mm/min)
M203 X2500.00 Y2500.00 Z240.00 E1200.00            ; set maximum speeds (mm/min)
M201 X300.00 Y300.00 Z20.00 E250.00                ; set accelerations (mm/s^2)
M906 X1300 Y1300 Z1300 E500 I30                    ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                            ; Set idle timeout
 
; Axis Limits
M208 X0 Y0 Z0 S1                                   ; set axis minima
M208 X390 Y590 Z68 S0                              ; set axis maxima
 
; Endstops
M574 X1 S1 P"^xstop"                               ; configure active-high endstop for low end on X via pin ^xstop
M574 Y1 S1 P"^ystop"                               ; configure active-high endstop for low end on Y via pin ^ystop
M574 Z1 S1 P"^zstop"                               ; configure active-high endstop for low end on Z via pin ^zstop
 
; Z-Probe
M558 P0 H5 F120 T6000                              ; disable Z probe but set dive height, probe speed and travel speed
M557 X15:215 Y15:195 S20                           ; define mesh grid
 
 
M950 R0 C"^fan0" Q2000 L0:24000   					; Create spindle index 0, PWM frequency 2KHz, 
                                                  ; Lmin:max rpm ranges from 0rpm at PWM=0% to 24000rpm at 100% PWM
                                                  ; spindle speed PWM pin	: exp.13 
M563 P0 R0 S"Spindle"                             ; Create Tool 0 with Spindle 0 and call it Spindle
 
T0						  							; Select Tool 0 (or make sure generated by CAM)
 
 
 
 
 
M453												; CNC Mode
; Heaters
;M308 S0 P"bedtemp" Y"thermistor" T100000 B4138     ; configure sensor 0 as thermistor on pin bedtemp
;M950 H0 C"bedheat" T0                              ; create bed heater output on bedheat and map it to sensor 0
;M307 H0 B1 S1.00                                   ; enable bang-bang mode for the bed heater and set PWM limit
;M140 H0                                            ; map heated bed to heater 0
;M143 H0 S120                                       ; set temperature limit for heater 0 to 120C
;M308 S1 P"e0temp" Y"thermistor" T100000 B4138      ; configure sensor 1 as thermistor on pin e0temp
;M950 H1 C"e0heat" T1                               ; create nozzle heater output on e0heat and map it to sensor 1
;M307 H1 B0 S1.00                                   ; disable bang-bang mode for heater  and set PWM limit
;M143 H1 S280                                       ; set temperature limit for heater 1 to 280C
 
; Fans
;M950 F0 C"fan0" Q500                               ; create fan 0 on pin fan0 and set its frequency
;M106 P0 S0 H-1                                     ; set fan 0 value. Thermostatic control is turned off
;M950 F1 C"fan1" Q500                               ; create fan 1 on pin fan1 and set its frequency
;M106 P1 S1 H1 T45                                  ; set fan 1 value. Thermostatic control is turned on
 
; Tools
                       ; define tool 0
;M453 S0 C"out1" R24000 Q100 T0
M563 S"XYZ-Probe" P1                    ; define XYZ Touch Probe tool 1
G10 P0 X0 Y0 Z0                                    ; set tool 0 axis offsets
G10 P0 R0 S0                                       ; set initial tool 0 active and standby temperatures to 0C
 
; Custom settings are not defined
 
; Miscellaneous
M575 P1 S1 B57600                                  ; enable support for PanelDue
M501                                               ; load saved parameters from non-volatile memory
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss
                                                 ; select first tool
 
 
 

[cjm]

@handymanpa54 Both fan and heater PWM outputs are easily accessible but they are also open drain outputs so a pull-up resistor is needed to enable a PWM signal to be generated.

If you connect a 3K9 or 4K7 resistor between the FAN0 pin and the adjacent V_FAN pin on the FAN0 header, you should see the PWM signal on the FAN0 pin with your ‘scope.