Sorry for my self talk but I solved my problem. To run am mix of 5V and 24V fans i used the following solution.

• Set the "V FAN" jumper to the V_FAN;VIN position
• Connect the 24V fans normaly
• Connect the black alias ground wire to the minus pin of the chosen fan port
  !Do not connect the red alias puls wire to the fan port, with great probability you will destroy our fan and/or the board
• Connect the red wire instead to the free 5V pin of the before described "V FAN" pinout area

Now you are able to control all fans from full power to switch off

Maybe a mod can take my description and put it into the wiki, maybe its more easy to find there

Thread closed

Sorry for my stupid post above, ist much easier than that. Fortunately my axis to adjust was y. So here my code from my homeall.g

G91             	                ; relative positioning
G1 H1 Z200 F1200 	; move quickly to Z axis endstop and stop there (first pass)
G1 Z-3 F150      	        ; go back a few mm
G1 H1 Z200 F100       	; move slowly to X axis endstop once more (second pass)

G1 H1 X-698 Y-355 F3000     ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y5 F6000                ; go back a few mm
G1 H1 X-698 Y-355 F360       ; move slowly to X and Y axis endstops once more (second pass)

M584 Y1 U3 P4        ;split y axis 
G1 Y1.2 F100           ; drive y axis (drive 1) 1.2mm back
M584 Y1:3 P3          ;recombine drive 1 and 3 to y axis 

G90                     ; absolute positioning

Sorry for my stupid post above, ist much easier than that. Fortunately my axis to adjust was y. So here my code from my homeall.g

G91             	                ; relative positioning
G1 H1 Z200 F1200 	; move quickly to Z axis endstop and stop there (first pass)
G1 Z-3 F150      	        ; go back a few mm
G1 H1 Z200 F100       	; move slowly to X axis endstop once more (second pass)

G1 H1 X-698 Y-355 F3000     ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y5 F6000                ; go back a few mm
G1 H1 X-698 Y-355 F360       ; move slowly to X and Y axis endstops once more (second pass)

M584 Y1 U3 P4        ;split y axis 
G1 Y1.2 F100           ; drive y axis (drive 1) 1.2mm back
M584 Y1:3 P3          ;recombine drive 1 and 3 to y axis 

G90                     ; absolute positioning

Hey I use this code and it works as desired

M400 ; make sure we've finished any other movements

M558 K0 P5 F100 C"!e1stop"
M563 P0 S"ZProbe"
T0 ; set the fake tool
 
M585 Z10 F600 P0 S1 ; probe 'forward' in Z 10mm or until Probe 3 triggers
G10 L20 Z19.5		;Set Tool Offset to 19.5mm thickness of the touch plate

;raise the dirll for 5mm for the second run
G91             	; relative positioning
G1 Z+5 F1000      	; go back a few mm
G90					;absolute positioning

M585 Z10 F100 P0 S1 ; probe 'forward' in Z 10mm or until Probe 3 triggers
G10 L20 Z19.5		;Set Tool Offset to 19.5mm thickness of the touch plate

;raise the dirll for 20mm
G91             	; relative positioning
G1 Z+20.5 F1000     ; go back for 20mm
G90					;absolute positioning

But maybe I discovered a bug. If you leave out the first G10 command, the code behaves confusing. After the first pass, the z-axis run down in the ground for maybe 20mm and then perform the second probing. The raise for 5mm don`t seems to be performed. Maybe someone else can reproduce that.

@phaedrux Ok, so I will use my old method.

Here the code from RRF2

|config.g
M584 X0 Y1 Z2 U3
M574 X1 Y1 U1 S0 ; Set active low endstops
M574 Z2 S0 ; Set active high endstops

|homeall.g
G91 ; relative positioning
.... ;Z-axis stuff
G1 S1 Y-1500 U-1500 F2400 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 Y+10 U+10 F2400 ; go back a few mm
G1 S1 Y-1500 U-1500 F300 ; move slowly to X and Y axis endstops once more (second pass)
G1 U+0.9 F100 ; move only U 0.9mm back so achieve squareness
M584 Y1:3 P3 ;combine 1 and 3 to Y
G90 ; absolute positioning

Here my Version for RRF3

|config.g
M584 X0 Y1 Z2 U3
...
M574 Y1 S1 P"!ystop" ; configure active-high endstop for low end on Y via pin !ystop
M574 U1 S1 P"!e0stop" ; configure active-high endstop for low end on U (second Y motor) via pin !e0stop

|homeall.g
G91 ; relative positioning
.... ;Z-axis stuff
G1 S1 Y-1500 U-1500 F2400 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 Y+10 U+10 F2400 ; go back a few mm
G1 S1 Y-1500 U-1500 F300 ; move slowly to X and Y axis endstops once more (second pass)
G1 U+0.9 F100 ; move only U 0.9mm back so achieve squareness
M584 Y1:3 ;combine drive 1 and drive 3 to one axis
M574 Y1 S1 P"!ystop+!e0stop" ; configure active-high endstop for low end on Y via pin !ystop and e0stop Pin

G90 ; absolute positioning

@phaedrux I thought I could do this in the software. Never mind i try to solve this hardware wise.

Did anyone else have a solution for my Problem?

here an abstract of my config.g file

...
M584 X0 Y1:3 Z2 ; Apply custom drive mapping Y-Axes with two drives
...
M574 Y1 S1 P"!ystop+!e0stop" ; configure active-high endstop for low end on Y via pin !ystop and e0stop Pin

homeall.g

G91 ; relative positioning
G1 H1 Z200 F1200 ; move quickly to Z axis endstop and stop there (first pass)
G1 Z-3 F150 ; go back a few mm
G1 H1 Z200 F100 ; move slowly to X axis endstop once more (second pass)

G1 H1 X-698 Y-355 F3000 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y5 F6000 ; go back a few mm
G1 H1 X-698 Y-355 F360 ; move slowly to X and Y axis endstops once more (second pass)

G90 ; absolute positioning

nether M574 or G1 allow me to set an offset to drive 3 in example

@phaedrux Thank you for your very fast response. But in the text you linked I couldn't find the answer of my problem, or I don't understand how to use G30 command for equaling my y-axis.

Adjusting dual y-axis
With my cnc I recently switch to FW 3.2.2 and by the way had to fit on my config.g and home configuration. I have a 2 motors belt driven y-axis with 2 independent endstops. Everything works just fine, but with the new already combined y axis, I can’t set a offset for one of the y-axis drives. If I measure after homing, I have an offset of about 1.1mm between both motors, so my gentry is not square. In RepRep FW2.. I solved the Problem before combining both axis, but know I am a little at a loss. Unlikely I didn’t found a solution in the forum jet.

Sorry for my self talk but I solved my problem. To run am mix of 5V and 24V fans i used the following solution.

• Set the "V FAN" jumper to the V_FAN;VIN position
• Connect the 24V fans normaly
• Connect the black alias ground wire to the minus pin of the chosen fan port
  !Do not connect the red alias puls wire to the fan port, with great probability you will destroy our fan and/or the board
• Connect the red wire instead to the free 5V pin of the before described "V FAN" pinout area

Now you are able to control all fans from full power to switch off

Maybe a mod can take my description and put it into the wiki, maybe its more easy to find there

Thread closed

Back again,

I tried little more, so i realized that the mosfets are in fine condition. I unplugged all fans and switched the jumper back to vin = vinfan. In this configuration i could fully throttle down the fan. So switched back again and measured the voltage between VIN and - pin of FAN1. In this case the minimal voltage is 18V. So this means, that the here descriped method "Mixed-voltage setups are not directly supported on the Duet 2 WiFi/Ethernet, but the Duet switches the fans' connections to ground, so you may be able to connect each fan's positive side to the appropriate voltage and its negative side to the appropriate pin on the Duet. Each controlled fan can be configured in firmware as a gcode controlled fan or as a thermostatically-controlled fan." don't work for me. The circuit must work different so that only a the amount of input voltage (here delta of 5 V) will be reduced, because with an Input of 5V (using a plus pin of a fan) the mosfed reduce the voltage down to 0V, how expected.

Do anybody also has a mixed voltage setup and give me some advise how to solve my problem? Didn't found a 5V radial fan so far.

greetings Kane

Hey community,

Are my fan mosfets broken when PWM still works? I changed from a 5V PWM axial FAN, to a 24V radial FAN. I use a 24V power supply.
But now I'am unable to switch off the fan anymore, only changing the rpm is possible. I changed it back for testing and in pmw mode i still can use the complete rpm range. The fan is connected to the - pin of FAN1 (or FAN0 for testing) and VIN i cached up at the 5V,VIN,VOUT pinout, because i still set the jumper to 5V because auf the hotend fan. I hope my description is not to confusing.