I have had miserable luck with the duet 3 scanning probe. I just purchased a can adapter board from Amazon that is engineered so much better. Surface mount components but through hole tech for USB-C and Can cables. I ran the 5VDC line from the Cartographer 3d v3 to the same 5VDC as the USB and connect the ground can L and Can H to the screw terminals on the adapter board. Then I connected the green (CanH) and white (CanL) to the 1LC and the 5VDC and ground to the 5VDC plug used for the SZP. The blue light on the cartographer is blue when proximity to the bed is close and off when moved away from the bed. I have to enter the codes in the Config, but it appears to be working.

@jay_s_uk I took it out of the printer, connected it to a 24 VDC power supply and the pi to the computer with the USBC and the 24-40 pin cables. The wiring could not be simpler yet there was no change. I updated the firmware in the Pi 5 to 3.5.4 but the transfer pin faulted there as well. The update did finish.

Then I took it all down to pieces and used only the microSD card that came with the board and a USBC cable to the computer and the computer doesn't see it and the device manager doesn't have it.

@Phaedrux I would rather use SBC mode. if I cannot get the SBC mode straight, there is little to no point. I have Two Manta M8P with integrated CM4 with 8 gb memory and 16GB EMMC and I had klipper on the emmc for years. CanFD was the clear choice as Can was too flakey. I still have a couple EBB36 tool boards but UUID's kept getting lost.

@elmoret Let me know what shipping is and preferred way of payment.

@droftarts I just shh into Pi and updated to version 3.5.4 and still waiting for transfer PIN. I will take out the Pi5 again and then put the card in and follow the instructions on getting it to stand alone. What is the point of all this. I think it is time to move past duet.

@Polyneutron21 I looked at the contents of the Micro SD that came with the 6HC and put it back into the 6HC then connected to the ethernet and only the red and green lights are on but I don't see any communication through the router. Do I need a jumper or something to tell it to go to stand alone mode?

@droftarts I did remove the 16GB micro SD but this did not resolve the "Timeout waiting for transfer pin" and I have two Pi 5's and have tried both. The one dedicated to the SBC roll used to work fine. I took the Pi5 off the display and tried that one with a fresh image but that didn't work either. I also have two 24-40 pin cables and neither of those make a difference.

@andywm I have the same issue. I had Chinese boards that played nice until they started getting drop outs. I purchased a genuine Duet 3 6HC and used the included cable to connect the Pi5 to the 6HC and "Timeout waiting for transfer pin. I noticed a 16 gb micro-SD card in the 6HC and thought it may be the issue, but no. Then I tried a new 24-40 pin cable and still had the same issue. Formatted thee 64GB stick with 2024-09-19-DuetPi_arm64.img and tried it after booting all Led's were bright but still had the same issue, tried a different Pi5 with a fresh copy and still "timeout waiting for transfer pin.

I am at the end of my rope,

@T3P3Tony
Thank you for verifying that. Something must have happened to the GPIO of the 6HC or Pi 5.

@lukeatkin
I created on open in the Duet GPIO 26 pin to 40 pin cable. I purchased another one from Geekpi and it will not allow the PI 5 to boot. I believe the Duet cable is wired differently than the downgrade 26 Pin to 40 pin cable. I have wired as pictured and the red light just blinks. There is only one other way to install the 40 pin and that wouldn't work either. Where might I find the original Duet 3 6HC to Pi GIPO cable.

This adapter looks at can A,B,C and FD and communicates between them. I haven't worked on this again up to this point. I was looking forward to the Duet Scanning Z probe but this is the fourth one I have purchased. The first one worked until the cable plug fell off. The second the input shaping loosed a screw and damaged the probe board. The third and fourth where DOA. So, I plan to pick this up again. If I can detect the voltage change as the cartographer sees the bed and lights blue. Then pulling away the light goes off. If I can, I will write the codes into the config. I will also see if this Can FD capable board will communicate through can.