Duet3 : DCS is not started

reFlexlab

Hello,
I have just run the Duet 3 in standalone mode and connected myself via Yat and sended a M115 command, here is what i get :

M115
FIRMWARE_NAME: RepRapFirmware for Duet 3 MB6HC FIRMWARE_VERSION: 3.2.2 ELECTRONICS: Duet 3 MB6HC v1.01 or later FIRMWARE_DATE: 2021-02-11
ok

chrishamm

That's looking good so it sounds like you may have a dodgy connection between the Duet and the Pi. And of course make sure to remove the microSD card again from the Duet before you power it up for SBC mode.

When you have the Pi started and you see the error message again, please do the following:

Press F11 to leave fullscreen mode
Open a terminal
Run sudo journalctl -u duetcontrolserver -ef
Check what error message is reported when DCS starts

reFlexlab

Thank you Chris,

Here is the error message that I get :

"Could not connect to duet (Timeout while wainting for transfer ready pin)"
duetcontrolserver .service : Failed with result 'protocol'

reFlexlab

@chrishamm

jay_s_uk

can you post a photo of the connection between the duet and the SBC?

chrishamm

Yes, I suppose there is a problem with the connection of pin 22 from the Duet to the Pi. Any chance you can measure the continuity of that particular pin of the ribbon cable?

reFlexlab

@jay_s_uk

reFlexlab

@chrishamm Apparently, there is continuity .

Here what we used to check it .

chrishamm

@reFlexlab Thanks for test this. There are a few more things you can try next to help identify if the problem is the Duet or the Pi:

Please check the continuity of that particular pin with the ribbon cable connected to both sides, that is to the Duet and to the Pi.
With the ribbon cable disconnected from the Pi, connect pin 1 of the RaspPi (3.3V) to pin 22 of the expansion header. Then run gpioget gpiochip0 25 from a terminal. It should output 1 to indicate that the transfer ready pin reads +3.3V. If it reads 0 even with the cable connected, the Pi is damaged and you should replace it.
If it worked, power up the Duet via USB and turn it around. You can then measure the voltage between GND and TfrRdy (pin 22), which should again read +3.3V.

reFlexlab

@chrishamm said in Duet3 : DCS is not started:

0

Thank you , I have tested this setup and the Terminal output 0, when i test for the Raspberry Pi.

I have also tested the tension between Ground and PIN 22 on the expension Header of the Duet, which output 0 volt

I will send you the photo of our setup.

reFlexlab

chrishamm

@reFlexlab You are not testing with the right pins (see https://pinout.xyz/pinout/pin22_gpio25#) because your cable is connected to GND. When you connect the jumper cable to the +3.3V pin, make sure you do not connect it to +5V, else you'll break your Pi. The previous photo looks OK though.

If the TfrRdy pin on the Duet stays at 0V even with no SD card in the Duet and RRF 3.2.2 running, I suspect the board is damaged. If you can confirm that you probed the correct pin on the Duet side, I suggest you do a warranty exchange.

reFlexlab

@chrishamm
Hello,
1 - I will test with a new raspberry Pi this afternoon to see if it changeg anything.

2 - I will send you a photo of my experimental setup to check the Trfdy Pin is working on the Duet.

If the board is damaged, How its working to make a waranty exchange ?

Tom

reFlexlab

@chrishamm
Hello Chris,

1- I have retested the Raspberry Pi with the right pin using the

gpioget gpiochip0 25

here are the results

2 - Regarding the Duet, I have tested the TrfRdy Pin again and it seems to display 0 V.
I think the Duet is Borken.

I think i know why this happened :

I use a power a 24V MeanWell power supply, I think i reversed the VIN + and - . But after reading the How To destroy your Duet I saw that modern power supply could not cause this because of a protection.

Thank you for your Help.

Tom

toy4x4

Just pointing out I have this same issue and the exact same results with all the testing as the above. I a nutshell, the Duet3 no longer outputs 3.3v to signal the PI on pin 22.

Board bought May 11th from Filastruder. Was getting ready to print my 4th Benchy on a new system. Had turned the system off (Duet3 powers PI). When I turned it back on, it no longer worked.

Phaedrux

@toy4x4 Perhaps best to start a new thread so we can investigate.

Auré

Hello,

I don’t understand because I have 3,3v beetwen ground and pin 22 and I have DCS error. This error appear after maybe I made a mistake, I have duet 3 with pi 3b+ and I send a Duet3Firmware_MB6HC.bin with DWC with the system page….. I think I m lost (Sorry for my english)

Phaedrux

@auré Please start a new thread with more details.