Missing extruder steps with Duet3 6HC/3HC

medicusdkfz

Today I had an inspiration of the 3rd kind: After I had retooled my Voron with aluminum parts, I immediately installed the latest beta firmware. I use a Duet3 6HC with CAN bus on a 3HC board. My extruder motor is connected to the 3HC. During testing, I noticed that the filament flow, which previously ran smoothly, now stalled. I related the phenomenon to the conversion. I then disassembled and checked the extruder several times; there was no improvement.
Today I had the last stable release installed and lo and behold: It works again!
I have been annoyed for some time with the rather expensive Duet3 combination. Again and again I had problems with the extruder and the control via CAN bus... In my opinion, this setup is not very trustworthy at the moment.

Kindly regards,
Pierre

T3P3Tony

@medicusdkfz can you send M122 and M122 Bx where "x" is the ID of the expansion board before starting a print that has this issue, and then again after the issue has happened and post the outputs here. please aslo send M115 and M115Bx so we can confirm the firmware versions running on the boards.

If there are issues related to the CAN protocol then there is some information that can be found in those reports. Also the very latest beta firmware has more reporting on the state of Can transfers so after getting those reports it may be worth trying that and there may be more information contained in the new reports.

dc42

@medicusdkfz, the remaining issues with extruders connected via CAN bus that we are aware of have been resolved in the 3.3beta source code. Please update to 3.3beta3 when we release it, which we expect to do next week.

Rushmere3D

@dc42

In preparation for its release, how would one update to a beta firmware with a duet 3 in SBC mode?

Thanks.

Phaedrux

@rushmere3d https://duet3d.dozuki.com/Wiki/Getting_Started_With_Duet_3#Section_Software_Installation

See here for adding the unstable branch repository.

Rushmere3D

@phaedrux I assume as I already have a working setup, I just need to add the unstable source and then the sudo update stuff. Correct?

What about the expansion board firmware, will that be downloaded with the update and then follow the update procedure for expansion boards.

Thanks.

Phaedrux

@Rushmere3D Yes, add the repository and update as usual.

The expansion boards should be updated automatically as well, but check them with M122 B1, etc and update them manually if needed with M997 B1, etc

T3P3Tony

@rushmere3d said in Missing extruder steps with Duet3 6HC/3HC:

I just need to add the unstable source and then the sudo update stuff. Correct?

Note this from the documentation linked:

In case you were using the stock package feed, make sure to remove it before you run apt-get:
sudo rm /etc/apt/sources.list.d/duet3d.list

same applied is reverse when switching back to the stable feed - remove the unstable one

medicusdkfz

@dc42 said in Missing extruder steps with Duet3 6HC/3HC:

@medicusdkfz, the remaining issues with extruders connected via CAN bus that we are aware of have been resolved in the 3.3beta source code. Please update to 3.3beta3 when we release it, which we expect to do next week.

Thank you for this answer. But itˋs not so easy... I lost my confidence with the beta firmware, because I had to much trouble with my Duet combination at my Voron. And I thought, it was me... Thinking to give the SKR boards a try especially with the multimaterial option (9 colors) for the Voron 2.4...

Rushmere3D

@dc42 Has this firmware been released yet?

Thanks.

Phaedrux

@rushmere3d 3.3 beta 2 is available.

https://github.com/Duet3D/RepRapFirmware/releases/tag/3.3beta2

and there have been some early test builds for beta3 on DC42s dropbox link.

I think Beta3 should be just around the corner.

Rushmere3D

@phaedrux I actually updated to 3.2.2 today and so far it's fixed the issue I was seeing.