Posts made by SupraGuy

Thanks for the info.

I found the getting started docs, and missed that section. Go figure. Thanks for the link.

So I have ordered the mini 5 and the 1LC toolboard, as that seems like the best fit for the hardware that I have and plan to use. I have a Hemera hotend already, but if I'm going to mount the accellerometer to match X and Y axes, the mount will need to be different from what looks like it's intended. Also, I have the part cooling fan and Z probe already held in place using the front side mounts, so I'll add horizontal mounting on top.

I think the biggest thing that i'm looking forward to is the input shaping. All of my printers so far have suffered somewhat from ringing. I had a chance to play wiht a printer that had input shaping enabled and it was an eye opener for sure. The CANbus wiring also seems really nice to have, getting rid of that thick bundle of wires to the hotend will be a big relief.

Thanks again!

@droftarts Thanks.

The local reseller has the 1LC boards, I don't think they have the other. I'm not looking for blinding speed, the motors that I mean to use have a 2A max current, so the TMC2209 aren't a problem.

The idea of using the accelerometer for input shaping has appeal, too. I like RRF and am not looking to jump to klipper.

Also not sure what advantages adding a SBC like a Pi to the board offers, so look g forward to that.

Considering possible multi-material, would the +2 driver expansion still work with this? Well, for that I would still want to loom at CANbus connected options, most likely.

So I just want to triple check before ordering hardware.

New project, CoreXY printer with 3 Z motors.

Proposed control, Duet 3 Mini 5 + 1LC toolboard. If I understand correctly, the 1LC has an on board TMC2209 driver, so I should be able to use the 5 on-board drivers as alpha, beta, Z1, Z2, and Z3. Giving me 6 drivers in total. I think the 6HC is overkill as I don't want or need more than 1.5A current to any of the motors, and frankly the idea of the CANbus connected hotend is actually really appealing instead of running all of those wires to the Hemera.

If this won't give me the extra driver, I guess I need to get the extra 2 driver board.

Okay... This is still making me crazy...

Configuration is still as it was last. I've changed stuff and changed it back, and behaviour is as it was. When I power the printer up, the part fan (Fan 0) comes on, nothing that I can do powers it down, except to redefine it with thermostatic control. Then it will follow the heater, and still not turn on/off. I've been leaving it on, but trying some filaments that are a bit more picky about part cooling, and it isn't going well...

Doubtful. It's brand new, but with some of these Chinese parts that might not mean much. The fact that it worked reliably on thermostatic control is what really gets me though.

Hopefully I don't have to change the config file anymore, so if it acts up again, I'll replace the fan.

Okay. I give up. I left the printer on and had a shower, when I came back, the part fan was on, and I could turn it off. So... yay?

@Phaedrux that would be no.

So if I define fan 0 on out8, the fan comes on. If it's on out9, it is off. If I define it as thermostatic, it comes on at temperature, so pretty sure that it isn't hardware.

; Configuration file for Duet 3 MB 6HC (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.15 on Tue Feb 21 2023 20:05:02 GMT-0800 (Pacific Standard Time)

; General preferences
G90                                          ; send absolute coordinates...
M83                                          ; ...but relative extruder moves
M550 P"DMG3D03"                              ; set printer name
M669 K1                                      ; select CoreXY mode

; Network
M552 P0.0.0.0 S1                             ; enable network and acquire dynamic address via DHCP
M586 P0 S1                                   ; enable HTTP
M586 P1 S0                                   ; disable FTP
M586 P2 S0                                   ; disable Telnet

; Drives
M569 P0.0 S0                                 ; physical drive 0.0 goes backwards
M569 P0.1 S0                                 ; physical drive 0.1 goes backwards
M569 P0.2 S1                                 ; physical drive 0.2 goes forwards
M569 P0.3 S1                                 ; physical drive 0.3 goes forwards
M569 P0.4 S1                                 ; physical drive 0.4 goes forwards
M569 P0.5 S1                                 ; physical drive 0.5 goes forwards
M584 X0.0 Y0.1 Z0.2:0.3:0.4 E0.5             ; set drive mapping
M350 X16 Y16 Z16 E16 I1                      ; configure microstepping with interpolation
M92 X100.00 Y100.00 Z100.00 E395.45          ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00          ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z3000.00 E2700.00     ; set maximum speeds (mm/min)
M201 X3000.00 Y3000.00 Z1500.00 E3000.00     ; set accelerations (mm/s^2)
M906 X1100 Y1100 Z800 E800 I30               ; set motor currents (mA) and motor idle factor in per cent
M84 S60                                      ; Set idle timeout

; Axis Limits
M208 X-15 Y0 Z0 S1                           ; set axis minima
M208 X235 Y250 Z243 S0                       ; set axis maxima
M671 X-35.3:271.3:117.5 Y34.5:34.5:307.8 S5  ; Motor positions: -35.3,34.5; 271.3,34.5; 117.5,307.8

; Endstops
M574 X1 S1 P"^io0.in"                        ; configure switch-type (e.g. microswitch) endstop for low end on X via pin ^io0.in
M574 Y1 S1 P"^io1.in"                        ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin ^io1.in
M574 Z2 S3                                   ; configure sensorless endstop for high end on Z

; Z-Probe
M950 S0 C"io4.out"                           ; create servo pin 0 for BLTouch
M558 P9 C"io4.in" H5 F120 T6000              ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X0 Y-36 Z3.24                       ; set Z probe trigger value, offset and trigger height
M557 X5:205 Y2:202 S50                       ; define mesh grid

; Heaters
M308 S0 P"temp0" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0                           ; create bed heater output on out0 and map it to sensor 0
M307 H0 B0 S1.00                             ; disable bang-bang mode for the bed heater and set PWM limit
M307 H0 R0.155 D15.47                        ; set PID parameters for heated bed
M140 H0                                      ; map heated bed to heater 0
M143 H0 S120                                 ; set temperature limit for heater 0 to 120C
M308 S1 P"temp1" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin temp1
M950 H1 C"out1" T1                           ; create nozzle heater output on out1 and map it to sensor 1
M307 H1 B0 S1.00                             ; disable bang-bang mode for heater  and set PWM limit
M307 H1 R1.800 K0.448:0.000 D7.97 E1.35 S1.00 B0 V24.1
M143 H1 S280                                 ; set temperature limit for heater 1 to 280C

; Fans
M950 F0 C"out9" Q500                         ; create fan 0 on pin out7 and set its frequency
M106 P0 S0 H-1                               ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"out7" Q500                         ; create fan 1 on pin out8 and set its frequency
M106 P1 S0 H1 T45                            ; set fan 1 value. Thermostatic control is turned on
M950 F2 C"out4" Q500                         ; Pretend that the LED lighting is a fan...
M106 P2 S0 H0 T30:75                         ; set fan 2 value. Thermostatic control follows the bed
M950 F3 C"out8" Q500
M106 P3 S0 H1 T45

; Tools
M563 P0 D0 H1 S"Hemera"                      ; define tool 0
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
T0                                           ; select first tool

Current state of config.g with fan 0 on out9 and a fan defined on out8 with thermostatic control. I also tried changing the tool to the non zero fan to see if that was it. Grasping at straws... currently the F parameter for M563 is not defined, to let it default to 0.

Okay... I changed the line:
M563 P0 S"Hemera" D0 H1 F1

So now it reads:
M563 P0 S"Hemera" D0 H1 F0

And... nothing changed. Still can't seem to control the fan, it still comes on full blast when the board powers up.

So... maybe it's the control pin? I changed it to "out9" and moved the fan connector. Yay, it's off... and won't turn on....

Okay, I'm re-reading the M563 page, and it seems that I should tell it that it's fan 0. I'll change that, and see how it works...

@dc42 M563? I guess I didn't touch that from the configuration tool, so I think it's defined as having fan 1 (Which is the thermostatic controlled fan that keeps the heat from coming up the throat.)

config.g:

; Configuration file for Duet 3 MB 6HC (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.15 on Tue Feb 21 2023 20:05:02 GMT-0800 (Pacific Standard Time)

; General preferences
G90                                          ; send absolute coordinates...
M83                                          ; ...but relative extruder moves
M550 P"DMG3D03"                              ; set printer name
M669 K1                                      ; select CoreXY mode

; Network
M552 P0.0.0.0 S1                             ; enable network and acquire dynamic address via DHCP
M586 P0 S1                                   ; enable HTTP
M586 P1 S0                                   ; disable FTP
M586 P2 S0                                   ; disable Telnet

; Drives
M569 P0.0 S0                                 ; physical drive 0.0 goes backwards
M569 P0.1 S0                                 ; physical drive 0.1 goes backwards
M569 P0.2 S1                                 ; physical drive 0.2 goes forwards
M569 P0.3 S1                                 ; physical drive 0.3 goes forwards
M569 P0.4 S1                                 ; physical drive 0.4 goes forwards
M569 P0.5 S1                                 ; physical drive 0.5 goes forwards
M584 X0.0 Y0.1 Z0.2:0.3:0.4 E0.5             ; set drive mapping
M350 X16 Y16 Z16 E16 I1                      ; configure microstepping with interpolation
M92 X100.00 Y100.00 Z100.00 E395.45          ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00          ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z3000.00 E2700.00     ; set maximum speeds (mm/min)
M201 X3000.00 Y3000.00 Z1500.00 E3000.00     ; set accelerations (mm/s^2)
M906 X1100 Y1100 Z800 E800 I30               ; set motor currents (mA) and motor idle factor in per cent
M84 S60                                      ; Set idle timeout

; Axis Limits
M208 X-15 Y0 Z0 S1                           ; set axis minima
M208 X235 Y250 Z243 S0                       ; set axis maxima
M671 X-35.3:271.3:117.5 Y34.5:34.5:307.8 S5  ; Motor positions: -35.3,34.5; 271.3,34.5; 117.5,307.8

; Endstops
M574 X1 S1 P"^io0.in"                        ; configure switch-type (e.g. microswitch) endstop for low end on X via pin ^io0.in
M574 Y1 S1 P"^io1.in"                        ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin ^io1.in
M574 Z2 S3                                   ; configure sensorless endstop for high end on Z

; Z-Probe
M950 S0 C"io4.out"                           ; create servo pin 0 for BLTouch
M558 P9 C"io4.in" H5 F120 T6000              ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X0 Y-36 Z3.24                       ; set Z probe trigger value, offset and trigger height
M557 X5:205 Y2:202 S50                       ; define mesh grid

; Heaters
M308 S0 P"temp0" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0                           ; create bed heater output on out0 and map it to sensor 0
M307 H0 B0 S1.00                             ; disable bang-bang mode for the bed heater and set PWM limit
M307 H0 R0.155 D15.47                        ; set PID parameters for heated bed
M140 H0                                      ; map heated bed to heater 0
M143 H0 S120                                 ; set temperature limit for heater 0 to 120C
M308 S1 P"temp1" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin temp1
M950 H1 C"out1" T1                           ; create nozzle heater output on out1 and map it to sensor 1
M307 H1 B0 S1.00                             ; disable bang-bang mode for heater  and set PWM limit
M307 H1 R1.800 K0.448:0.000 D7.97 E1.35 S1.00 B0 V24.1
M143 H1 S280                                 ; set temperature limit for heater 1 to 280C

; Fans
M950 F0 C"out8" Q500                         ; create fan 0 on pin out7 and set its frequency
M106 P0 S0 H-1                               ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"out7" Q500                         ; create fan 1 on pin out8 and set its frequency
M106 P1 S0 H1 T45                            ; set fan 1 value. Thermostatic control is turned on
M950 F2 C"out4" Q500                         ; Pretend that the LED lighting is a fan...
M106 P2 S0 H0 T30:75                         ; set fan 2 value. Thermostatic control follows the bed

; Tools
M563 P0 S"Hemera" D0 H1 F1                   ; define tool 0
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
T0                                           ; select first tool

Okay, so I have 3 fans defined. (One isn't really a fan, it's a set of LED pucks.

2 are defined with thermostatic control (Fan 1 and Fan 2) and one is defined with thermostatic control off.

; Fans
M950 F0 C"out8" Q500                         ; create fan 0 on pin out7 and set its frequency
M106 P0 S0 H-1                               ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"out7" Q500                         ; create fan 1 on pin out8 and set its frequency
M106 P1 S0 H1 T45                            ; set fan 1 value. Thermostatic control is turned on
M950 F2 C"out4" Q500                         ; Pretend that the LED lighting is a fan...
M106 P2 S0 H0 T30:75                         ; set fan 2 value. Thermostatic control follows the bed

So, Fan 0 is the part cooling fan. I intend this to be turned on/off using M106 S255 or M106 S0 -- at least that's what Prusa Slicer puts in the Gcode for it.

This does not seem to work. Sometimes the fan comes on when I power up the printer and stays on. Entering Gcode in the console does not seem to affect it, with or without the "P" parameter.

The other 2 work on the thermostatic control, but I can't seem to get them to work manually.

I've read through the Gcode docs several times, can't seem to figure out what I've done wrong...

Firmware info:
Board: Duet 3 MB6HC (MB6HC)
Firmware: RepRapFirmware for Duet 3 MB6HC 3.4.5 (2022-11-30)

Okay, I've got it sorted...

What was confusing me is that I was trying to use it the G30 P0 ... set the exact same way as I do on my printer that has the DC42 IR probe, which doesn't deploy. It does work the way that I was using it, though I can see from the "proper" use of it that I am doing it a bit weird, by manually accounting for the probe offset.

@droftarts said in BLTouch driving me bonkers...:

usually used in a macro to level a bed with multiple independent motors.

Which is exactly what I wanted to use it for, as I have 3 independent Z motors (On drives 2, 3, and 4)

Took me a while to get back to this, but it's all good now.

Hey, long time, no post...

Okay, so I'm using a Duet 3 6HC mainboard, and decided for SOME reason to use a BLTouch instead of the IR sensor that I could have scavenged from a defunct printer. At this point, the IR sensor is starting to look pretty good.....

I have a CoreXY printer with 3 Z motors. Most things are working acceptably, except getting that Z=0. My BLTouch is attached to io4. I read that io4 or io7 work, not sure why others say they don't.

If I home everything (Homing Z moves to maximum position, trying to use sensorless homing there because it's just a rough guess. I'm having some trouble with that, too, but it doesn't matter because at 25% current (which does seem to be working) it's not doing any harm.

First, it doesn't seem to care what the offset is, G30 probes in whatever position the head is in, even if I specify X and Y coordinates. (the probe is 36mm "in front" of the print head, X=0, Y=-36.) I would expect that the probe would move the print head to the Y position + 36mm to probe, but that's not too important...

If I just use G30, the BLTouch deploys, and the bed is probed, and the zero is adjusted. and the Z is lifted

If I use G30 S-1 the BLTouch is deployed, the bed is probed, and I'm told that it triggers at the 2.5mm (Which is what I told the firmware the Z offset is, so that means that the first adjustment worked.

If I try to set a point with G30 P0 the probe does not deploy and the bed is not probed, and I get no error.

If I manually deploy the probe with M280 P0 S10 (The automatically generated contents of deployprobe.g from the configuration tool) the probe deploys (And if the height is too low, the BLTouch starts flashing error.) G30 P0 still does not probe the bed (even if there is no error) and does not report an error. G30 still works as expected.

So... I'm stymied.

Okay, relevant details:

M115
FIRMWARE_NAME: RepRapFirmware for Duet 3 MB6HC FIRMWARE_VERSION: 3.4.5 ELECTRONICS: Duet 3 MB6HC v1.01 FIRMWARE_DATE: 2022-11-30 19:35:23

The BLTouch is connected to io4, with +5V to vin, io4.out connected to the servo pin, GND to both the servo ground and the IO ground, and the stop input connected to io4.out (5 wires to 4 pins.)

config.g:

; Configuration file for Duet 3 MB 6HC (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.15 on Tue Feb 21 2023 20:05:02 GMT-0800 (Pacific Standard Time)

; General preferences
G90                                          ; send absolute coordinates...
M83                                          ; ...but relative extruder moves
M550 P"DMG3D03"                              ; set printer name
M669 K1                                      ; select CoreXY mode

; Network
M552 P0.0.0.0 S1                             ; enable network and acquire dynamic address via DHCP
M586 P0 S1                                   ; enable HTTP
M586 P1 S0                                   ; disable FTP
M586 P2 S0                                   ; disable Telnet

; Drives
M569 P0.0 S0                                 ; physical drive 0.0 goes backwards
M569 P0.1 S0                                 ; physical drive 0.1 goes backwards
M569 P0.2 S1                                 ; physical drive 0.2 goes forwards
M569 P0.3 S1                                 ; physical drive 0.3 goes forwards
M569 P0.4 S1                                 ; physical drive 0.4 goes forwards
M569 P0.5 S1                                 ; physical drive 0.5 goes forwards
M584 X0.0 Y0.1 Z0.2:0.3:0.4 E0.5             ; set drive mapping
M350 X16 Y16 Z16 E16 I1                      ; configure microstepping with interpolation
M92 X100.00 Y100.00 Z100.00 E395.45          ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00          ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z3000.00 E2700.00     ; set maximum speeds (mm/min)
M201 X3000.00 Y3000.00 Z1500.00 E3000.00     ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E800 I30                 ; set motor currents (mA) and motor idle factor in per cent
M84 S60                                      ; Set idle timeout

; Axis Limits
M208 X-15 Y0 Z0 S1                           ; set axis minima
M208 X235 Y250 Z243 S0                       ; set axis maxima
M671 X-30.3:276.3:222.5 Y34.5:34.5:307.8 S5  ; Motor positions: -30.3,34.5; 276.3,34.5; 222.5,307.8

; Endstops
M574 X1 S1 P"^io0.in"                        ; configure switch-type (e.g. microswitch) endstop for low end on X via pin ^io0.in
M574 Y1 S1 P"^io1.in"                        ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin ^io1.in
M574 Z2 S3                                   ; configure sensorless endstop for high end on Z

; Z-Probe
M950 S0 C"io4.out"                           ; create servo pin 0 for BLTouch
M558 P9 C"io4.in" H5 F120 T6000              ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X0 Y-36 Z2.5                        ; set Z probe trigger value, offset and trigger height
M557 X15:195 Y15:195 S20                     ; define mesh grid

; Heaters
M308 S0 P"temp0" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0                           ; create bed heater output on out0 and map it to sensor 0
M307 H0 B0 S1.00                             ; disable bang-bang mode for the bed heater and set PWM limit
M307 H0 R0.155 D15.47                        ; set PID parameters for heated bed
M140 H0                                      ; map heated bed to heater 0
M143 H0 S120                                 ; set temperature limit for heater 0 to 120C
M308 S1 P"temp1" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin temp1
M950 H1 C"out1" T1                           ; create nozzle heater output on out1 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"out7" Q500                         ; create fan 0 on pin out7 and set its frequency
M106 P0 S0 H1 T45                            ; set fan 0 value. Thermostatic control is turned on
M950 F1 C"out8" Q500                         ; create fan 1 on pin out8 and set its frequency
M106 P1 S1 H-1                               ; set fan 1 value. Thermostatic control is turned off

; Tools
M563 P0 S"Hemera" D0 H1 F0:1                 ; define tool 0
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
T0                                           ; select first tool

And in case someone can tell me why this doesn't work...
homez.g:

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.3.15 on Tue Feb 21 2023 20:05:02 GMT-0800 (Pacific Standard Time)
G91                         ; relative positioning
M913 Z25:25:25              ; set motor current to 25%
M915 P0.2:0.3:0.4 S3 F0 R0  ; configure stall detection 
M574 Z2 S3                  ; Set endstop configuration to stall detection
G1 H1 Z250 F2400            ; move Z up until the endstop is triggered
G92 Z250                    ; set Z position to axis maximum (you may want to adjust this)
M913 Z100:100:100           ; restore motor current

; Uncomment the following lines to lift Z after probing
;G91                         ; relative positioning
;G1 Z5 F100                  ; lift Z relative to current position
G90                         ; absolute positioning

Any help appreciated...

Edit: G29 works...

@siam Thanks for the confirmation. Yeah, fuses were the first thing I checked.

The more I probe at this cloned board, the more I appreciate the build quality of the originals.

Edit, looking at where U3 is located, I don't think I can repair this myself, so I'll use an external 5V supply, until I can source a genuine replacement... Or I retire one of my printers.

So I was cutting a CNC job, when the Duet just stopped. Bang, no power to motors, no response on the network, nothing.

No LED lights for 5V or 3V3, just the Vin light, so it was getting 12V power, but no logic power.

Full disclosure, this is my one knock-off. I have 3 other Duet 2 Wifi boards, all genuine, but I wanted one more, and the official supplier out here was out of stock. Still is, it turns out. Looks like they only have the Diet 3 boards now. (I want one for my CoreXY printer, which needs 6 drivers, but that has to wait for now.)

Anyway, I pulled the Duet from the CNC, and decided to see how bad it cooked. As opposed to th e last time (I let a hotend run over the cabling ) when I cooked a bunch of stuff, this time, it didn't seem so bad. The SD card at least wasn't dead. So I plugged it into USB. Hmmm. Recognised device, so turn on the serial monitor, and it connected to the wifi. DWC works.

12V power... nope.

So I suspect that the knock-off 5V regulator has comitted seppuku. It appears not to have taken the wifi module or the MCU with it. The status of the motor drivers is unknown because I have not had both USB and Vin connected at the same time, but I might try that with a USB power brick (I don't know that I want anything that I care about connected to the USB when there's a suspect regulator between 5V and 12V, though I suppose that if it were that bad it would have damaged more stuff on board.)

The moral of the story is one that I've told often enough... The cost of cheap equipment is the cost of the cheap equipment, plus the cost of the expensive equipment to replace it, plus the time and trouble to troubleshoot and replace.

I might give some SMT soldering a try to replace this regulator though. No stock on replacement boards.

Guess I better figure out which is the 5V regulator...

I've moved all of my stuff (Except for some half-baked things that weren't any good) onto Prusaprinters.org myself. Probably moves some of the crap over, too, honestly.

I've recently become a little more serious about my CAD development, so hopefully better things coming.

@code7 It will somewhat depend on your laser, it might need a 3V3 connection (100% PWM) or it might have an "on" button on it, so it only needs the 12V connection.

I went ahead and ordered the PWM modules that will output the 5V PWM from the Heater 3 pin. Turns out that I got 15 of them because minimum orders, so depending on where you are in the world, I could probably mail you one for pretty cheap. (I didn't get the wire headers for the 12V/GND in, and the 12V/GND/PWM out because they didn't seem to be in stock anywhere.) I don't like using the PWM on the full 12V, but some people have had good results from that.

I'm in a similar boat, though I don't have the Duex5.

The PWM on the Duet triggers the negative, so you can sort of use it. You can power the laser from the heater circuit, or at least the trigger. You can use a separate 12V supply for the positive side, and use the PWM management for the negative, or you can use something like this circuit to switch the PWM input from the laser, with a separate 12V supply. (I just got a few boards made for that circuit, which can be (apparently) plugged into the expansion header on the Duet2.)

Looks like if you want a native PWM manager, you need the Duet 3.

For the 12V version, you may need an external MOSFET, you just feed the 12V from a separate supply, tie the ground together with your 24V supply, and supply the ground through the MOSFET to the laser. The laser then stays at 100% and the heater circuit will manage PWM. It should work OK, but the fan will also be PWM controlled to match the laser.

Very timely, as I was just looking for this information myself to drive a PWM laser from a Duet 2 Wifi.

I ended up purchasing boards from JLCPCB.com, and they appear to have a minimum order quantity of 5 (And for some reason, it's cheaper to buy 15.) ... So I have 15 on the way, populated with the SMT components C1 and U2. It was a bit unclear as to which side H1 connected to. It looks like it should go on the bottom of the board, though I'm not sure which header it connects to. If it's on the expansion board, that could be a problem for me, and I might need to figure some other stuff out, but it appears to occupy pins 1-8 of the 50 pin expansion header.

Anyway, I've got the boards on the way, and 8 pin headers coming separately. I'll probably just solder wire to the board for the DC in and laser out, since neither JLCPCB nor Digikey seemed to have appropriate connectors in stock when I looked.

For what the extra cost, maybe I should have just bought a Duet 3 6HC instead.

First off, hi everyone! It's been a while!

Okay, so I'm setting up a new machine, replacing an SKR board running Marlin.

I'm setting up my fourth Duet2 Wifi, (3rd currently in use) to take its place, because I'm tired of sneakernet file management. I've just got it set up on RRF3.3 (Sticking with stable releases) and realized that there's one feature that I had on Marlin that I'm not sure of how to implement in RRF.

For an axis with multiple drives, setting up the multiple stops is straightforward enough, but I don't have those stops as perfectly aligned as I'd like. Marlin let me set an offset to the first endstop, so when I home it, it just bumps the one end away from the stop a little, and everything is nicely levelled (M666) used for dual endstops, slightly different from the Delta calibration usage.

Physical adjustment of the endstops is a bit of a pain, and getting the desired precision is troublesome. It wouldn't be so bad if it were Z, because I could use the Z probe to level it to the bed, but it's Y, and aside from measure and adjust, there's no guaranteed way to force it to be perpendicular to X. (The whole reason I really love this printer is because I can have X and Y absolutely perpendicular, and adjust as the printer frame ages, something that I've been unable to do with other printers.

The approach that I've been mucking with is the old one of "uncouple the Y axis into U and V axes, then make a tiny adjustment to U, then recouple the Y axis to both drives." My hope is that there's an easier way.