Printer architecture
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You can use an two more external drivers on the CONN_LCD header with recent firmware
That would allow you to drive your 6th extruder.
Is this compatible with the panel due? What's the standard use of this header?
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Yes it is compatible with Panel Due. The original plan was to support 20x4 text LCDs on that connector, but demand for that was very low and a requirement for more stepper drivers arose, so we repurposed it.
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Thanks a lot, I now have my printer general architecture.
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I don't like having 2 nozzles side by side (idle nozzle leaking, all those concerns).
I would make an IDEX like the SIGMA. Same construction - X Y on top, and bed moves down, but the XY is "regular" and not COREXY. Your diamond will dock to the left and your single support extruder will dock to the right. Requires 1 additional motor for the 2nd X axis. That should be exactly 10 motors.
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I don't like to have a moving axis motor so IDEX with a carthesian moving system so it's not the best idea in my opinion.
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I saw this thread http://forums.reprap.org/read.php?397,714601 about static motors for IDEX in a coreXY setup but I don't know if it's possible with a duet board.
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yes, it is called CoreXYU: http://forums.reprap.org/read.php?397,775415
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Do the duet board allow this kind of architecture (in the frimware I mean, without too much tweaking)?
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Yes, it's supported in the standard firmware build. See https://duet3d.com/wiki/Configuring_RepRapFirmware_for_a_CoreXY_printer.
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Thanks
