The far bigger issue is that reviewers don’t have the time to put 1000 hours and more on the printer. So a lot of them are just an extended unboxing experience.
Next issue is that nearly all of the influencers have no expertise at all. They are just talking heads and happen to know a thing or two about 3D-printing. This means they still have no clue at all about embedded/electronics and mechanical design and often make hillerious comments.
here is the schematic: https://github.com/Duet3D/Duet-2-Hardware/blob/master/Duet2/Duet2v1.06/Duet2_Schematic_v1.06.pdf
There is a 74HCT02 which can do up to 20mA so no pulldown resistor is required.
Not looking forward to cut traces on it for troubleshooting. It is an original board (no clone) so it should be exactly the parts in this schematic assuming the linked revision matches the board revision.
I would troubleshoot that hardware first
Was my first instinct as well as I didn’t do any firmware updates prior.
The continuity test doesn’t show a short and the test Duet recommended in one of the documentation was to remove the SD-card. If the issue stays it is a hardware issue. If it is “gone” it isn’t and me removing the SD-card causes this behavior to stop further indicating a software issue. Reading the schematic right now for the first time and I am schoked that there is no ESD-protection at all. Nothing. Just a straight connection from the mosfet to the output… what the hell where they thinking …
Would need to have an in-depth look at the schematic but likely I can’t probe the MOSFET gate voltages in the circuit.
What I could do is probe the signal/heater enable signal from the MCU.
Wide display: perfect for reading A4 documents
keyboard: nicer to type. Also, the passport was as wide as, well … , a passport so it is a pretty decently sized keyboard which isn’t comparable to the tiny Q10.
The passport was never meant to be a generic for the masses device. It is a beautiful specialized tool.
This device has a tiny touchscreen, and a keyboard, rather than having the whole thing being a touchscreen.
That’s awesome. I still miss my Blackberry Passport (keyboard and large 1:1 screen).
Will report back tomorrow.
One more information: It happens immediately after turning the printer on. the heater output doesn’t need to be enabled in the control interface or by g-code.