Duet 3 Mini 5+ : Initial announcement
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@T3P3Tony Fantastic!!! Will the new board be available for pre-order same as Maestro?
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Have you some thermal picture like for duet3d ?
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I am pleased to report that the first prototypes of the Duet 3 Mini 5+ are working well. However, we've made a few changes to the specification for the second prototype boards, mainly to improve versatility, but with an eye to controlling cost too.
We have reduced the stepper driver support from 5+3 to 5+2. This has allowed us to eliminate 3 chips and to improve the speed and efficiency of stall detection. We think that few users buying a mid-priced board would need 8 stepper drivers.
We've also reduced the number of general purpose I/O connectors from 6 to 5. There are still an additional 2 input-only connectors; so each stepper driver can have an associated endstop switch, Z probe or filament monitor.
The biggest change we've made is to add CAN bus support. This places the new board firmly in the Duet 3 family, and it will allow the Mini 5+ to communicate with existing and forthcoming Duet 3 expansion boards. Expansion will be limited compared to the Duet 3 MB6HC because of the less powerful processor and reduced amount of RAM - in particular, the maximum supported number of CAN-connected stepper drivers will be
reduced - but (for example) it will be possible to connect several Duet 3 tool boards to a Mini 5+. -
@dc42 Sounds great!! Any news on beta testing?
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@dc42 I would have had a use for 8 steppers, but hey, if I can get it working through tool boards that’s fine for me as well, I think I actually prefer that. Will the expansion in that case be pin compatible with the maestro two stepper expansion?
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@pixelpieper said in Duet 3 Mini 5+ : Initial announcement:
@dc42 I would have had a use for 8 steppers, but hey, if I can get it working through tool boards that’s fine for me as well, I think I actually prefer that. Will the expansion in that case be pin compatible with the maestro two stepper expansion?
It's not pin-compatible. One reason is the the Maestro expansion board had no stall detection outputs
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So what is the advantages over the duet wifi 2 ?
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@dc42 fair enough, makes sense! Thanks for the update and super quick response. Really excited for this new iteration!
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@peter247 said in Duet 3 Mini 5+ : Initial announcement:
So what is the advantages over the duet wifi 2 ?
- More modern stepper drivers, supporting stealthChop and interpolation to x256 from any input microstepping
- Lower cost expansion if you just need 1 or 2 more stepper drivers
- Interface for Raspberry Pi or other single-board computer
- Double the flash memory and RAM, facilitating more firmware expansion in the future
- Expansion via CAN
- Support for mini-12864 displays as well as PanelDue
- Barrier strip VIN and bed connectors instead of terminal blocks
- Supports 4 fans instead of 3, two of them optionally with tachos
- Lower cost (we hope!)
Disadvantages compared to Duet WiFi:
- Not expandable to more than 7 drivers, 3 heaters and 4 fans without using the CAN bus
- Not compatible with more than two external stepper drivers, except via CAN
- Lower maximum motor current
- Fan cooling required at lower motor currents than for Duet 2
- Only one 2-channel temperature daughter board supported instead of two
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is it strange that I am eagerly looking forward to replace my perfectly functional maestro?
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@dc42 said in Duet 3 Mini 5+ : Initial announcement:
Expansion via CAN
Expansion is more limited, it does not support the CAN-FD bus
Can you use the CAN tool board on it ?.
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@dc42 said in Duet 3 Mini 5+ : Initial announcement:
The biggest change we've made is to add CAN bus support. This places the new board firmly in the Duet 3 family, and it will allow the Mini 5+ to communicate with existing and forthcoming Duet 3 expansion boards. Expansion will be limited compared to the Duet 3 MB6HC because of the less powerful processor and reduced amount of RAM - in particular, the maximum supported number of CAN-connected stepper drivers will be
reduced - but (for example) it will be possible to connect several Duet 3 tool boards to a Mini 5+.it supports CAN-FD so yes it will support our Duet 3 tool boards
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@antlestxp Nope, I am with you brother!! can't wait.
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The biggest change we've made is to add CAN bus support , now that as become useful .
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@dc42 said in Duet 3 Mini 5+ : Initial announcement:
We have reduced the stepper driver support from 5+3 to 5+2. T
Deal killer for me. Oh well. I was excited for this board. It was going to be the recommended board for CroXY.
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with the addition of the canbus, you can add extension board with additional steppers like this
https://www.duet3d.com/Duet3Expansion3HC -
@dc42 said in Duet 3 Mini 5+ : Initial announcement:
The biggest change we've made is to add CAN bus support.
Perfect!
That gives many new options for adaption. Even upgrading the main board to a 6HC, as one can leve the CAN based expansion boards untouched...or reuse them.
That makes it also easyer for beginners...
Start with a Mini++ and expand the hardware step by step to the level of experience...
The appetite comes while eating.... -
@wesc said in Duet 3 Mini 5+ : Initial announcement:
@dc42 said in Duet 3 Mini 5+ : Initial announcement:
We have reduced the stepper driver support from 5+3 to 5+2. T
Deal killer for me. Oh well. I was excited for this board. It was going to be the recommended board for CroXY.
How were you using 8 motors? Dual X, dual Y, triple Z and one extruder perhaps? If so then you could put a Tool Board on the print carriage, which would provide the 8th stepper driver and greatly reduce the number of wires going to the print carriage.
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@dc42 Is it possible to get my hands on a Duet3 Mini now and help with testing or is that closed?
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@jallen810 said in Duet 3 Mini 5+ : Initial announcement:
@dc42 Is it possible to get my hands on a Duet3 Mini now and help with testing or is that closed?
We have a small number of generation 1 prototypes available. Our priority for those is existing and potential OEM customers. The version 1 prototypes do not support CAN, and the firmware for them doesn't include stall detection.