mcu issues (solved) + psu no voltage

I finished up the wifi setup and board firmware installation and now I am trying to proceed to Mainsail. I always get an error "MCU couldnt connect".
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36 Replies
VanOfHoogen
VanOfHoogen14mo ago
I also can't seem to connect to ratos.local during configuration. when ssh'd in the rpi lsusb returns while ls /dev/serial/by-id/* returns nothing
VanOfHoogen
VanOfHoogen14mo ago
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blacksmithforlife
that is not how it is done with ratos due to the automatic flashing. what board do you have?
blacksmithforlife
how did you confirm the firmware was flashed correctly?
VanOfHoogen
VanOfHoogen14mo ago
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blacksmithforlife
ok, did you edit your printer.cfg to match your hardware?
VanOfHoogen
VanOfHoogen14mo ago
I though that it generated a sample printer.cfg? Is there a v-minion template that I could copy psate?
blacksmithforlife
it does, but you still have to go and edit the file to match your setup you haven't completed the steps after clicking the install v-minion button https://os.ratrig.com/docs/configuration#initial-configuration
At this point we haven't told klipper anything about our hardware, if you're not using the default control board for your particular config, you'll get an MCU error. This is normal, continue below.
miklschmidt
miklschmidt14mo ago
This is likely because you updated the system packages, there's a bug in debian that delete the udev rule that maps devices to /dev/serial/by-id/*. In RatOS your board should be at /dev/skrat-10 see: https://discord.com/channels/582187371529764864/844364874216898562/1102292641128915095 At this point, you just follow the guide, which tells you to install the v-minion template and uncomment your hardware in printer.cfg.
VanOfHoogen
VanOfHoogen14mo ago
had to change the board type in printer.cfg I thought that the setup file would have overriden it. The extruder is however not heating up
VanOfHoogen
VanOfHoogen14mo ago
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miklschmidt
miklschmidt14mo ago
Then you have wiring problems, either your thermistors are swapped or your heater isn't wired properly
VanOfHoogen
VanOfHoogen14mo ago
Like the heating wires should be swapped? I do see both bed and probe thermistor reporting temp correctly Let me see if the bed even heats up
miklschmidt
miklschmidt14mo ago
A heater is just a resistor, polarity doesn't matter
VanOfHoogen
VanOfHoogen14mo ago
also getting this error which cause klipper to crash Unable to read tmc uart 'stepper_z' register IFCNT
VanOfHoogen
VanOfHoogen14mo ago
GitHub
Unable to read tmc uart 'stepper_x' register IFCNT, skr e3 mini v1....
Klipper has been working amazingly. I turned the printer on (an Ender 3 with an skr e3 mini v1.2) and got the following error. I wouldn't think this is actually an error with Klipper but I don&...
VanOfHoogen
VanOfHoogen14mo ago
do I have a dead TMC2209 driver?
miklschmidt
miklschmidt14mo ago
Did you remember to configure the driver jumpers for UART? Pay attention to the jumpers in the wiring diagram
VanOfHoogen
VanOfHoogen14mo ago
As in the exact same color code for each wire? sorry what step is that again?
VanOfHoogen
VanOfHoogen14mo ago
all green squares are present
miklschmidt
miklschmidt14mo ago
and the rest are removed?
VanOfHoogen
VanOfHoogen14mo ago
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VanOfHoogen
VanOfHoogen14mo ago
Yes
VanOfHoogen
VanOfHoogen14mo ago
actually both extruder and bed aren't heating
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miklschmidt
miklschmidt14mo ago
check the fuses for continuity
VanOfHoogen
VanOfHoogen14mo ago
I replaced the fuse
miklschmidt
miklschmidt14mo ago
I'd start there..
VanOfHoogen
VanOfHoogen14mo ago
I don't get 24v out from the psu to the big tree tech board
miklschmidt
miklschmidt14mo ago
Huh? the PSU doesn't have 24V between dc + and - ? Are you in a 110V country and forgot to flip the switch from 240v?
VanOfHoogen
VanOfHoogen14mo ago
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miklschmidt
miklschmidt14mo ago
this is bad Disconnect power wires from the SKRat. Measure again.
VanOfHoogen
VanOfHoogen14mo ago
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VanOfHoogen
VanOfHoogen14mo ago
I get 0
miklschmidt
miklschmidt14mo ago
Your PSU is dead sir Also please make sure the "V_USB" above the reset button doesn't have a jumper installed because your SKRat should really not be powered right now (with the PSU disconnected).