for anyone else wondering what "guitar tight" means - don't, this is a pretty vague definition that won't help you get proper belt tension.
instead, refer to the voron documentation (applicable to other coreXY printers like the PF4), which gives more detailed instructions + real, numerical values which you can target: https://docs.vorondesign.com/tuning/seco...
If your main filament sensor (or one of the extras) reads "active" when there's nothing inside of it, check the printer.cfg file and ensure that the switch pins are set to ^! and not just ^:
If you encounter an error 'ADC out of range' and are building 2 toolheads and not 4, be sure to disable extruder2 and extruder3 by commenting them out in the printer.cfg file, then saving and restarting the firmware.
Without disabling those sections, the BTT Octopus Max will try to read non-existent thermistor data, which will usually give a value in the couple of million degrees Celsius and thus trigger the 'ADC out of range' error.
At this point, if you get an error "Include file generic-bigtreetech-xxx.cfg does not exist", don't worry about it. Follow the instructions to upload the actual printer.cfg file from github (Step 7), and then initiate a firmware restart.
Wiring diagram is INCORRECT - the BTT Pi runs off 12V/24V DC input, unlike the Raspberry Pi which accepts 5v. The BTT Pi power cables should go to the 24V side of the power converter, not the 5V side.
for anyone else wondering what "guitar tight" means - don't, this is a pretty vague definition that won't help you get proper belt tension.
instead, refer to the voron documentation (applicable to other coreXY printers like the PF4), which gives more detailed instructions + real, numerical values which you can target: https://docs.vorondesign.com/tuning/seco...
Note that the 5V side of the power converter will still be used to power the servo motor in later stages, don't try to get rid of it.
If your main filament sensor (or one of the extras) reads "active" when there's nothing inside of it, check the printer.cfg file and ensure that the switch pins are set to ^! and not just ^:
[filament_switch_sensor filament_sensor]switch_pin: ^!PF4pause_on_runout: TrueIf you encounter an error 'ADC out of range' and are building 2 toolheads and not 4, be sure to disable
extruder2andextruder3by commenting them out in the printer.cfg file, then saving and restarting the firmware.Without disabling those sections, the BTT Octopus Max will try to read non-existent thermistor data, which will usually give a value in the couple of million degrees Celsius and thus trigger the 'ADC out of range' error.
At this point, if you get an error "Include file generic-bigtreetech-xxx.cfg does not exist", don't worry about it. Follow the instructions to upload the actual printer.cfg file from github (Step 7), and then initiate a firmware restart.
Wiring diagram is INCORRECT - the BTT Pi runs off 12V/24V DC input, unlike the Raspberry Pi which accepts 5v. The BTT Pi power cables should go to the 24V side of the power converter, not the 5V side.
For more info, refer to the BTT Pi user manual here: https://github.com/bigtreetech/BTT-Pi/bl...
the colours for this cable are red, green, yellow, and blue - not black as shown in the picture.
M2.5 x 10mm bolts work fine.
also, this is a good time to install all gantry panel idlers if you don't want to contort yourself later.
Again, install the idlers first: Stage 04: Gantry
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