@owend awesome, thank you bunches!

@eddiechilli

Hello, Savvas and I have similar setups. I have a different VFD, but maybe this will help. My VFD needs a 0-10V PWM signal for spindle speed and a 10V trigger to turn on FWD. I'm running my Duet 2 at 24V, so I need a voltage converter. I am using 2x of these:
0-10v.jpg

Which drops the voltage down to 10V and can translate a 0-24V PWM into a 0-10V PWM signal. They are wired to e0Heat and e1Heat with this config setup in RRF3.3 and use M3 for Spindle On and M5 for spindle off.

;Tools ; No tool is selected at startup M453 ; Set to CNC mode, M950 R1 C"e1heat+e0heat" L0:24000 Q300 ; Select Spindle On/Off,RPM & Direction (not selected). M563 P0 S"Laser" ; Create tool 0 Laser M563 P1 S"Spindle" R1 ; Create tool 1 with Spindle

In previous firmware versions, I used

;CNC M950 P0 C"e0heat" Q300 ; Allocate GPOP Port 0 to Heater 0 M453 C"e1heat" Q300 R24000 T1 ; Set to CNC mode, using Tool 1, 24000 Max RPM

Which meant assigning the FWD to e0heat by turning the spindle on with M42 P0 S1 and off with M42 P0 S0. e1heat would control the spindle speed.

I have tried other voltage regulators that did not work. These work for sure. Also, make sure to switch them from 5V to 24V using the jumper. Hope that helps.

In a different thread @dc42 wrote:
@dc42 said in What firmware version are you using?:

Does that mean if R in M950 and P in M563 are the same number during CNC mode, I would not need to write P# when using an M3 command?

Yes.

Should any spindle defining commands be in the tfree#.g tpre#.g and tpost#.g? That is to say I load the spindle separately from config.g file?

There is no need to do that. In config.g, define all your spindles, then for each tool specify which spindle it uses in its M563 command.

//

Ok, I think I get it. To config.g I added

M563 P3 R2 S"T3" R2 M563 P4 R2 S"T4" R2 M563 P5 R2 S"T5" R2 M563 P6 R2 S"T6" R2

To the config file. But this basically means I need to do this 20 times to cover all the different bits that I use.

Also noticed that you don't require Pn during M3 commands with any tool assigned to the spindle. but the spindle tool itself requires Pn presumable because M563 can't assign the spindle to the spindle itself. Not sure if this is a bug or by design.

@marius-h did you get it working?

@window_licker also interested in a more streamline process for this procedure. I have a cnc and I'd use this to carve onto uneven surfaces that are not associated with the curvature of the bed.

@phaedrux you are amazing, I had to invert them to get them to work correctly but it is now doing what it should. I am going to leave it like this for now so I can use it whilst looking into the updates you have listed. I will back everything up now so I can have a play with the firmware in a few days time.
If only I had known how easy it was to configure the endstops I would have added them when I built this.

Thank you once again for your help I'll try not to wreck it all now when I do the firmware upgrade.

@thekm The slow down when using an analogue probe (like the IR probe) no longer happens in RRF 3.3 and later (and only works with Z probing afaik). Instead M558 allows the fast then slow probing. See under 'New features' here https://github.com/Duet3D/RepRapFirmware/wiki/Changelog-RRF-3.x#reprapfirmware-33

• M558 now accepts either one or two F values, e.g. F1000:300. If two values are provided, then when executing a G30 command with no P parameter an additional probe using the first speed will first be done to establish the approximate Z=0 position, followed by one or more probes (controlled by the A parameter) to establish Z=0 more precisely.
• When using an analog Z probe, the probing speed is no longer reduced when the probe is close to triggering. Use the new M558 facility to do fast-then-slow probing instead, if necessary.

Also, not relevant here, but the IR probe is always in digital mode on Duet 3, because of the permanent pullup resistor. On Duet 2 it can be run in analog mode.

Ian

@alpenprinter So sorry it has taken me so long to get back to this.

Yes, I'm a Fusion360 user. I use a version of the DIY CNC Fusion 360 CAM post processor: https://github.com/guffy1234/mpcnc_posts_processor The software DOES create the M3 and M5 commands. I do 3D probing using a probe block that I bought from Avid.

If you are looking for the code or configuration that I use for my z-probe then you can have a look at my github repo where I store my configuration: https://github.com/n7jti/duet3-avid-cnc

Sorry I'm so late in getting this info back to you. I hope you find it at least interesting if not actually helpful.

@redvernon Happy to help and thanks for sharing the solution.

@educatingsavvas
I just wired up one of these and it works too.

One thing to note is that using less than 3000hz seems to result in the generation of a 0-10v signal that the VFD sees as oscillating and then it changes frequencies a lot. It ramps up and down 10’s of hertz.

@dc42 yeah, I have to check again, I think I don't have any H parameters

After looking at the documentation for the arm chip it looks like I need to enable the pull up resistor. I’ve done that and now the inputs work. I’ve also named them with the exp. prefix and that seems to work.

@dc42 How about connecting the PWM+ to a 5 Volt supply on the Duet and the PWM- to FAN2-

If you're not suing the internal drivers at all you can disable them entirely with M569 P# R-1 where # is the driver number.

@phaedrux I feel an opportunity coming up for watercooling modders and RGB enthousiasts 😜

Configuration file for Duet
; executed by the firmware on start-up
; WorkBee Firmware Version 1.0.7

; Configure Connection - ENABLE ONLY ONE OF THE BELOW THREE
M552 S1 ; Enable Wifi Network
;M552 S2 ; Enable Access Point Mode
;M552 S1 P192.168.2.12 ; Enable Ethernet - Change IP Address to suit

; - - - - - - - - - - - - - - - - - - - -

; DO NOT CHANGE ANY OF SETTINGS BELOW
; TO MAKE A CHANGE, COPY THE LINE OF CODE, PASTE IT INTO customconfig.g. THE CHANGE CAN THEN BE MADE IN customconfig.g
; ANY ADDITIONAL SETTINGS SHOULD BE PUT IN customconfig.g

; General preferences
M453 ; Put the machine into CNC Modes
M550 PWorkBee CNC Machine ; Set machine name
G90 ; Set absolute coordinates

; Network
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet

; Configure Drives
M584 X0 Y1:3 Z2 U3 P3; Apply drive mapping to axes
M569 P0 S0 ; Drive 0 goes forwards
M569 P1 S0 ; Drive 1 goes forwards
M569 P2 S0 ; Drive 2 goes forwards
M569 P3 S1 ; Drive 3 goes forwards

; Configure Axes
M92 X80.083 Y80.014 Z406.65 U80.014 ; Set steps per mm
M350 X16 Y16 Z8 U16 I1 ; Configure microstepping
M566 X500 Y500 Z500 U500 ; Set maximum instantaneous speed changes (mm/min)
M203 X6000 Y6000 Z2000 U6000 ; Set maximum speeds (mm/min)
M201 X100 Y100 Z100 U100 ; Set accelerations (mm/s^2)
M906 X2300 Y2300 Z1900 U2300 I100 ; Set motor currents (mA)

; Configure Axis Limits
M208 X0 Y0 Z0 U0 S1 ; Set axis minima
M208 X720 Y1260 Z120.5 U1260 S0 ; Set axis maxima

; Configure Endstops
M574 X1 Y1 Z2 U1 S1 ; Set active low endstops

; Other Settings
M140 H-1 ; Disable heated bed
M564 S1 H1 ; Disable jog commands when not homed
M911 S21.0 R23 P"G91 G1 Z3 F1000" ; Configure power loss resume
M501 ; Load Stored Parameters
;M98 Pcustomconfig.g ; Execute custom config settings

@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.

@handymanpa54 said in M950, M563, M3 commands to run VFD:

As @cjm said in the other thread https://forum.duet3d.com/post/244734, you still have a second M563 tool 0 definition later in your config.g that is overriding the first:

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 ... ; 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

Change the section after "; Tools" to:

; 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

(I've left the XYZ Touch Probe as tool 1, but you'll need to come back to that and define it properly.)

Edit: you may also need to invert the heater 4 pin, ie M950 R0 C"!exp.heater4" Q2000 L0:24000

Ian