@dc42, it is everything super clear now. Thank you very much again!

Dear @dc42,
Problem solved!
Thank you for your prompt reply.
Sorry for opening such a trivial thread. From the guide, I understood that Duet3D product, was the right dicitur. My bad.
Can I please ask a little demystification on the usefulness of the Symbol zip folder, please?
Cheers,
Francesco

Dear Comunity,
I am trying to revive an old duet 0.85 for a quick project, but I have issues.

After a few days of testing with the duet that was perfectly operational, now when I plug it (with the SD plugged) into my laptop (powered only by the USB), under "ports" in the device manager, I can only see a: USB Serial Device (COM9).

Reading the instruction under "All other Duet boards" @https://duet3d.dozuki.com/Wiki/Installing_and_Updating_Firmware , I can understand that I must have corrupted the firmware. However, all the right lights seem to be on (USB, 3.3V, and 5V).

I then downloaded the file called RepRapFirmware.bin that is available at the repository: https://github.com/Duet3D/RepRapFirmware/releases/tag/2.05.1

(can I please also ask what is the "Symbols-RepRapFirmware-Duet085.zip"? It feels like something I should use, but I can't understand how!)

I then get Bossa Program Port (COM10) in the Device Manager by pressing the erase and the reset button.

With Bossa, I flash the RepRapFirmware.bin downloaded previously, ensuring that the "Erase all", "Lock", and "Boot from Flash" boxes are all checked (selecting the correct serial port perfectly detects the ATSAM3X8 device).

The writing and verification stages give no errors. I then press the reset button as stated in the guideline (I also tried unplugging and reconnecting the USB as well as doing both things).

However, when I finish, I can only see "USB Serial Device (COM9)" again in the Device Manager. like I am stuck in a LOOP!!!

As far as I've understood, at this moment, I should see Duet 3D printer electronics listed in the Device Manager before proceeding with unzipping the DuetWebControl.zip in the a /www folder.

Opening the sd card on my desktop, it feels that as soon as I restore the firmware, the Duet will be operational as before. so I might not need this last part.

Thank you in advance for the hints.
Cheers,
Francesco

thank you all. As soon as I have access to the lab and I manage to build it I will post pictures for some further help. Thank you again. Cheers

@zapta ... perhaps I have no such competence to fully understand why and what it will means for my machine. I understand that 0.2 amps won't heat up the drivers, but what about torque? are there some settings that you suggest?

@Danal As soon as I publish something I will be incredibly happy to share! I am sure that I will receive some good hints for the next stage!

@Danal thank you for the reply. It doesn't have a hot bed and actually it is not a 3d printer... It is a filament winder for carbon fibres. I am using the duet because it is very practical and cost effective!

@pipersw I am just worried that I will meltdown the board with all the drivers... 24V power supply and all those nema17 (60 mm long cases.. the biggest ones) will all work fine ??

Hi all,
I have a good 24V power supply with 10 amps dc output current that I would like to use for my duet project. In particular, I am using a Duet 2 Wifi with 3 NEMA17 (amps per phase: 2, ohms per phase: 2, mH per phase: 3.3) plus 2 NEMA17 (amps per phase: 2.1, ohms per phase: 1.6, mH per phase: 3). Sorry my incompetence on the argument, but I would like to know if it is safe to wire and run such a system or, if there are some further safe measurement to take like wiring some resistors in series with the motor phases or similar. Any help will be very much appreciated. Thank you!

@dc42 Thank you for your reply. Sorry if I ask, but I am struggling in finding some documentation to use the breakout board in a single-ended configuration. Could you please provide me any useful link?