Fly-RRF-36 RP2040 Based CAN-FD Toolboard
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@fractalengineer I've asked the question
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@fractalengineer Flymaker (the designer) says 35V
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@fractalengineer I wonder how good of a match the TMC2209 and a fat NEMA23 motor will be? You'd have to throttle down the current so much, that there's not much torque left. You'll probably end up in NEMA17-range but with much bigger rotor inertia...
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@jay_s_uk Thank you very much, that does it for me!
@o_lampe Oh no the X/Y I'm running on TMC5160 from my Duet3MB6HC; I've found 65% of the rated 2.4A to be a good balance for my drivetrain.
Ideally I would have loved to try a board with a separate driver power rail to send them 48V but that would mean switching over to klipper
I have a whole couple threads on the forum if you want to learn more about running/tuning for big steppers
https://forum.duet3d.com/topic/18010/duet-3-stealthchop-2-tuning-for-nema23
https://forum.duet3d.com/topic/16297/help-needed-with-duet-3-6hc-tmc5160-stealthchop-config
Railcore II ZL
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@fractalengineer said in Fly-RRF-36 RP2040 Based CAN-FD Toolboard:
send them 48V but that would mean switching over to klipper
On my CNC I'm using a Mellow Fly board with a split high-voltage driver rail (3x high voltage, 5x board supply voltage). It runs on RRF and allows mixing various stepper drivers. Not sure about it's CAN-FD abilities, but there are newer boards from Fly...
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@o_lampe holy I might have to look into it then thanks for the heads up!
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@fractalengineer said in Fly-RRF-36 RP2040 Based CAN-FD Toolboard:
Ideally I would have loved to try a board with a separate driver power rail to send them 48V but that would mean switching over to klipper
Duet 3 MB6HC version 1.2 and later support 48V VIN.
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@jay_s_uk I ordered one to try. Before I send firmware to it wanted to make sure I am right. On my computers plugging it in does nothing, no RPI drive. I do load Duet 3 motion Control on Com 3. If I press the reset on the RrF-36 I bring up a directory on the RRF-36 with 2 small files in it. Is that the RPI drive? Since I found no mention of resetting the device to bring up the directory want to be sure that will work.
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@KenW yes, that right. It appears they've been preloading them with 3.5b4.
I need to update the documentation on it -
I was wondering about putting a few of these in a heated chamber. Any info on maximum chamber temp before it starts having issues? i dont see any max temp specs on github or on aliexpress page. Im wanting to run between 80C-100C.
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@breed I would suggest its 85 degrees (without having to look at all the datasheets for each component).
Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF. Assume I'm running whatever the latest beta/stable build is
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@jay_s_uk That's what I was thinking too. Regular duet tool board is prob the same.
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@breed it is
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With a Duet board you apparently do not need to use the beta firmware. The Duet 3 mini 5+ has 3.4.6 and the Toolboard has
Duet3Firmware_FLY36RRF.uf2 from 3.5.0-rc.1 It's working fine, I first did a minimal install just enough to see if it would talk to the control board which it did. Then installed the hotend heater and thermstat so the nozzle could be heat set.. Then tried the etruder stepper and fans. All works fine. Will finish this tomorrow when the inline fuses come in.
