@phaedrux well to be honest I believe it was the M997 B1. Because I had previously been on 3.2.2 on the mainboard and did the ssh Sudo upgrade stuff in the pi and it did not change to a newer version on the mainboard. But I did do both, so I don't know with 100% certainty, apologies.
It seems to be solved. I just tried to connect each pin of the duet marked "used" (with dupont connectors), according to the wiring scheme , to my Raspeberry and they communicate. So I freed the GPIO 3.
That's a good idea, since the tripod (as I envision it) has it's own non-linear kinematics?
How often will you need these servos? Does your bed misalign so frequently, that it's worth the efford?
My bed rests on three ballscrews and I haven't had to touch their adjustment since day 1.
Over time the bed does move as it's just cantilevered from the rails at the back of the printer. It's not much in terms of bed adhesion, it's more about ensuring part parallelism.
Careful, that link actually doesn't apply to the Duet3.
It works for my Duet3 6HC without major issues. The only piece of information missing is to pull the SBC jumpers.
Yeah you're right. Every time I look at the schematic, I get a headache.
The description for the PS_ON header says...
3-pin KK labelled PS_ON: open drain mosfet output for controlling an ATX-style power supply or a SSR. The +5V pin can also be used to provide external 5V power. A small amount of 5V power can be drawn from this pin (through an internal 220 ohm resistor), so that the control terminals of an SSR can be connected directly between the +5V and PS_ON pins. Note: on the v0.5 board this connector is rotated 180 degrees compared to the intended orientation on later version boards.
It doesn't actually say that you can PROVIDE power via that header.
The schematic does show that you can input 5V from that header but if you try to draw 5V from it, it goes through the 220ohm resistor.
I don't think it would pose a long term issue, however that is not up to our standards and we will gladly issue a replacement to alleviate your concerns. Please contact your vendor and initiate a warranty exchange. Include a link to this thread as authorization. Sorry for the inconvenience.
Thank you very much. I am in Canada. I would not be normally concerned about this in any consumer electronics, but I have seen and measured how hot the TMC drivers normally run and over time I think it could be a potential reliability issue (I'm an engineer)...
Oh, and no need to apologise, I know quite well this is an imperfect world!