Duet 3 current hardware config for Railcore II?
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Hello
I am just finishing my build of a RailCore II 300ZLT ( that I started in 2020). This is a personal Machine at my home. My printer build is mostly metal.
I have built up the mechanics with a NEMA 23 Halo and I am starting to look at the controls.
The kit was originally supplied with a Duet 2 combo, but I like the look of your DUET 3 board in combination with your NEMA 23 smart motors and the Duet 3 Toolboard as well as your scanning Z probe all on CAN bus.
I was hoping to keep and use the Bondtech BMG and Mosquito combo printhead, but I am open to changing the printhead if you feel there is major advantage to using your Duet 3 Roto toolboard with the E3D Roto extruder.Do you have any example system configuration drawings (block diagrams?) vaguely like this –
using these latest Duet controls and their suggested interconnections that would suit my printer?
Regards
Frank Howard
Sr. Automation/Application Engineer
Addup Inc.
Cincinnati, Ohio, USA -
Have you been to the Railcore discord?
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@Phaedrux , yes I have. There is some discussion of Duet 3 hardware, but not of wiring and configuring a total system of Duet 3 including the motors and other CAN I/O that I noticed.
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@FrankHowardNUSA Railcore Discord is the place to ask those questions, not enough people here familiar with Railcore. There are stock configs posted for Duet 3 on a Railcore. You'd want to use a 6HC (and a 1LC if you want a CAN-connected toolboard).
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@FrankHowardNUSA Stock Railcores use a Duet 2 or 3 mainboard only, no additional CAN connected boards, as far as I can see. Anything beyond that is a 'custom' setup, and is going to require you to configure and maintain the setup yourself.
However, this forum (and the Railcore Discord for more Railcore-specific questions) is here to support you, and the latest version of the configuration tool should get you most of the way in setting up the machine; see https://configtool.reprapfirmware.org/
For your actual choice of boards, as the mainboard is only running the Z axis, if you are using the LDO-42STH40-1684MAC NEMA 17 motors (1.6A), a Duet 3 Mini 5+ would be plenty for them.
For the X and Y motors, a NEMA 17 motor (the same as Z) is specified in the BOM; is there a mod for NEMA 23 motors? 2 x Duet 3 M23CL closed loop motors can be used if so. The 6HC and Mini 5+ support them.
For the toolboard, as you want a scanning Z probe, you may as well use the new Roto toolboard. It would be capable of driving your Bondtech BMG and Mosquito, as well as having the SZP (and accelerometer) built in. You may have to create a custom mount for it on the toolhead, though.For CAN connection advice and cabling, see https://docs.duet3d.com/en/User_manual/Machine_configuration/CAN_connection
Ian