We are excited to officially announce a new Duet Mainboard:

The Duet 3 Mini 5+ is an evolution of the Duet 2 Maestro, It provides 5 on board drivers and the normal compliment of heaters, fans, IO, LCD etc. There are a Wifi and Ethernet variants with the option of using an SBC for control in the same manner as other Duet 3 mainboard. Expansion is more limited, it does not support the CAN-FD bus (EDIT: it does now) but does have a header for a three driver expansion board (EDIT: now a two driver expansion board).

Ethernet version shown

We will have more news shortly, including RRP and a call for participants to take part in limited initial prototype testing.

We have just started supplying out resellers with the new version of the Duet 3 toolboard: v1.1

Key Changes:

• Added a LIS3DH accelerometer.
• Changed all headers other than VIN, OUT0 and CAN to JST PH right angle connectors. (Thanks @KarlMarklund who did this as mod to an older version)
• Added a footprint for a Omron D2FD-1L30-1T or similar switch (may be useful for tool dock confirmation).
• Added a solder jumper that brings a 120R CANFD bus terminating resistor into the bus circuit to allow a toolboard to be directly connected to a Duet 3 mainboard without a tool distribution board. Thanks to @Nuramori and @bearer for this suggestion
• Board dimensions changed slightly (mounting holes unchanged)
• Added a jumper to switch VOUT on OUT1 and OUT2 between 12V and VIN. Thanks @TLAS for this suggestion.

Documentation has been updated here:
https://duet3d.dozuki.com/Wiki/Duet_3_Tool_Board

For info, due to an increased number of spammers we have had to introduce the following changes:

1. No profile website, background image, description can be set for new users until they have a reputation of 3 or more.
2. Unverified users (users who have not verified their email address) have limited posting ability - just new topics.
3. Some users will have to have manual approval before they can register.
4. Our T&Cs for using the forum will be updated to make it explicit what is acceptable or unacceptable as far as linking out to external websites from your profile.

I realise that for some users who do not have an email address set, or verified, these new restrictions may be annoying. We are not doing this because we want to harvest your email and start spamming you! Quite the opposite it is to reduce the admin overhead of keeping the forums as spam free as possible.

The email address you register on the forums for is there to allow verification, and then following that for notifications (e.g. someone replied to your post or tagged you). All notifications emails can be configured in your profile and you do not need to receive any of you do not want to.

For information we do use other strategies to reduce forum spam. None are 100% effective, hence the layered approach.

Please also keep flagging spam posts or profiles when you see them in case they are missed by an administrator.

We have been working on a Scanning Z probe for Duet 3 / RepRapfirmware, I am happy to announce the details now:

https://www.duet3d.com/blog/Duet3d-Scanning-Z-Probe

https://docs.duet3d.com/en/Duet3D_hardware/Duet_3_family/Duet_3_Scanning_Z_Probe

We are aiming to get supplies to our resellers by the 22 of November

https://youtu.be/k-wD0_l69SQ

Over the upcoming Holiday season there will be a few days with no "official" forum support.

25 & 26 Dec
31 Dec, 01 Jan

In addition between 24 Dec and 02 Jan, on the other days, there may be more limited support.

This is to allow for the Duet3D team to take some days off over the holidays. It is not to discourage you from posting, and we will do our best to get back to you when we are back on the forum.

I would like to take the opportunity to wish everyone a happy end to 2022 and best wishes for 2023!

Duet3D has teamed up with Team Gloomy to change the current "Team Gloomy" discord server into one for RepRapFirmware, DWC, DSF and associated projects:

https://discord.gg/uS97Qs7

There are a number of reasons for this, but at its core its to address the misconception that RRF is only for Duet3D hardware. As an opensource project it is broader than Duet3D the company. There has been a lot of discussions recently about opensource within the 3d printing community. I am not going to attempt to address that here and now, however this step underscores the project goes beyond any company or individual.

We have long hosted discussion and support for the Team Gloomy port of RRF on this forum (and the whole community has benefited from @jay_s_uk, @gloomyandy, @Falcounet and others support and contributions).

I had personally resisted a move to Discord for two broad reasons:

1. I think forums are superior for more detailed technical support as the conversation is organised, easier to respond to in long form, search engine indexed and available as a reference for people with a similar issue.
2. Discord is another walled garden, they are not publicly indexed and we could lose the community built there if Discord shuts, or becomes enshittified like other social media platforms.

That said, the community is already there in a large part (both a lot of RRF users, and the wider 3d printing hobbyist community). Also Discord has recently introduced forum like channels with organised posts which go some way to address point #1. Discord bots allow for automation of functionally and could in theory be used to cross post with the forum (if someone know more about this please let me know!) , that in turn goes part way to address point #2.

I do not want Discord to move discussion away from the forum, however it already has to some extent. By working officially with Team Gloomy on discord it avoids further unnecessary splintering of the community. (something that would happen if Duet3D started its own public discord server).

We will keep the forum running for the foreseeable future and continue to provide support there, as well as a place for the community to post if they choose to do so.

We have completed our prototyping phase of the Duet 3 Mainboard and will be starting a limited initial production run shortly.

Headlines:

• 6 Stepper channels, at least 4A per channel.
• High speed dedicated bus to a single board computer.
• 2 CAN-FD buses for expansion.
• 10 PWM outputs for Bed heater, extruders, fans (example configuration is 3 extruders with 2 fans per extruder).
• 9 IO headers for Endstops, probes, filament sensors and other low bandwidth sensors.
• 4 Thermistor/PT1000 inputs and support for 2 temperature daughterboards (4 PT100s or Thermocouples).

Boards from this run are available for pre-order here:
https://www.duet3d.com/Duet3Mainboard6HC
This is on a first come first served basis.
We will begin delivery the first week of September, in the order we receive your purchases.

Initial documentation is available:
Duet 3 Mainboard 6HC Hardware Overview
Duet 3 Mainboard 6HC Wiring Diagram
We are also busy testing the second set of 3 channel expansion board prototypes, there is some more information on these here: Duet 3 Expansion Hardware Overview

Duet3D will be exhibiting at Formnext this year Hall 12.1 , stand G91. We would love to chat to anyone visiting,.

Its going to be a busy show, while there are 6 of us there we have back to back meetings for all 4 days so don't be surprised if there is limited forum interaction with @dc42 @chrishamm and @droftarts for next week.

Talking of @droftarts he has undertaken to post pictures here as the show progresses.

We will be showing off our new scanning Z probe (details to follow before the show starts), the production Motor 23CLs and a new <to be announced>

From 23 Dec 2023 to 02 Jan 2024 there will be reduced forum coverage from @Phaedrux @droftarts @dc42 and @chrishamm. The forum will be checked over this period but not as frequently and not all posts will be able to be answered. We would appreciate your patience while we take an end of year break!

Thanks for everyone for being part of this community over 2023, I would like to wish you all a happy and successful 2024!

Forum rules

These are the Forum Rules you agree to when you sign up:

• Be respectful: everyone is here to learn, help and contribute.
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• No spamming: this will get you banned immediately. See the SPAM section below.
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Changes/Additions to Rules:

• We reserve the right to expand on or change the rules as we grow.

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SPAM

Spam is unacceptable on this forum, if you are not sure what you are about to post is SPAM then ask one of the moderators or administrators. Spamming includes SPAM in your user profile and chat messages. Some non exhaustive examples of what we consider SPAM:

• Off-topic posts with links to external websites. We have an "off topic" category and discussing off topic matters there is fine, just don't use that as an excuse to link out to stuff in order to drive traffic there.
• Links in user profiles to commercial websites. The exception to that is Duet resellers and OEMs. Hobby or personal websites are normally ok for active users. If you register, do not engage on the forum and have a link in your profile you will potentially fall foul of the SPAM filters.
• Descriptions in profiles that are spam or SEO related
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Please flag spam posts or profiles when you see them in case they are missed by an administrator.

Notes

New users

Due to an increased number of spammers we have had to introduce the following changes:

• No profile website, background image, description can be set for new users until they have a reputation of 3 or more.
• Unverified users (users who have not verified their email address) have limited posting ability - just new topics.
• Some users will have to have manual approval before they can register.
• Our T&Cs for using the forum will be updated to make it explicit what is acceptable or unacceptable as far as linking out to external websites from your profile.

Registered/verified email address

• The email address you register on the forums is there to allow verification. Following that it is used for notifications (e.g. someone replied to your post or tagged you).
• All notifications emails can be configured in your profile and you do not need to receive any of you do not want to.
• We do not collect your email address to start spamming you! Quite the opposite; it is to reduce the admin overhead of keeping the forums as spam free as possible.

(updated 2nd Dec 2022)

@ComedianTF2 do you have access to a scope or logic analyser? It would be good to understand if the enable and step lines are behaving as expected after the first M569, i.e it's an issue with those drivers, or not

@martinv what is the chamber heater controller actually controlling? How many heaters, fans, temperature sensors etc?

@Aurimas thanks for the update.

If the same machine hardware configuration with the same firmware is running the same gcode file fine. then it's most likely corruption or interference. The other machine you are testing on that has the same hardware, are you are using 3.5.4 or 3.6b2 on that as well? If it's not then change the firmware to 3.5.4 and check the same gcode still has no errors, that will rule out a firmware issue.

It's possible, that the SD card is partly corrupted (they tend to die outright though). If this was the case then swapping the SD card would rule that out.

Trying without the panel due connected would rule out that source of possible interference (however once again, if it's every more then also unlikely but worth trying.

If neither of those work then try swapping the mini5+ out and see if that resolves the issue.

@Aurimas what is different between the two machines? Is the firmware on both the toolboard and the Mainboard in sync when you try 3.5.3 and 3.6b2?

Also as @droftarts mentioned have you tried a different SD card?

@Paski to confirm for anyone else reading this following our email exchange:

• That backlash is too high for successful calibration where the encoder is being used for motor commutation.
• There is inevitably backlash in a system where there is a coupler and then a leadscrew between the motor and the encoder.
• Using an encoder on the motor is effectively required for a well behaved system, adding a second encoder on the axis for position loop closing is supported but that can't be the only encoder.

Also, depending on axis length, and the position of the 1HCL, the SPI cable may be too long to be reliable, although thats not the specific issue in this case

@ComedianTF2 which version of firmware are you running?

I am not sure if this is something strange about how those motors behave or an issue with firmware.

@ComedianTF2 if you send M17 instead of resending the M569 command does that allow the driver to subsequently move?

@tom33 thanks for pointing this out.

If you use G53 (https://docs.duet3d.com/en/User_manual/Reference/Gcodes#g53-use-machine-coordinates) how does that impact the behaviour?

@droftarts please can you confirm if the issue can be replicated using @mike_b 's config.

@Alva please can you confirm if you have tested this.