3dp/Doomcube.notes at main · numindast/3dp · GitHub

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Personal notes on a doomcube build.

9/7/2024: time to get this document going!

LDO Leviathan MCU
Klipper Expander (bottom bay; for bed thermistor, SSR)
BTT Pi4B v1 adaptor with Raspberry Pi CM4 (CM4108032: 8gb, 32gb eMMC)
Waveshare 4.3" DSI LCD display
The Filter (with magnetic power connector)
Beacon Rev.H
Galileo G2E extruder + StealthBurner Filametrix dual-sensor/lever switch
Rapido HF (v1)

300x300x300 build volume
Possibly higher Z however umbilicals/PTFE tube may get squashed beyond what's reasonable.

LEDs:
  3x light sticks for top of chamber, 22 LED, RGBW
  9x 4x12 WS2812b LED panels, 432 LEDs in all

Firmware updates
~~~~~~~~~~~~~~~~
Leviathan MCU is in USB-CANbus-Bridge mode. It's connected to the Pi via USB.
We are not using CANbus for toolhead though. That is straight-wired using a passive PCB on the toolhead.
  https://canbus.esoterical.online/mainboard_flashing/common_hardware/LDO%20Leviathan/README.html

BoxTurtle AFC-Lite is connected via CANbus to the Leviathan.
  https://github.com/xbst/AFC-Lite/blob/master/Docs/AFC-Lite_Manual.pdf

Klipper Expander is USB-connected.
  Here's the config for compiling:
  https://github.com/VoronDesign/Voron-Hardware/blob/master/Klipper_Expander/Documentation/Setup_and_Flashing_Guide.md

  and this is how to flash it without accessing the physical boot jumper and reset button:
  https://usb.esoterical.online/

11/28/2024: 47h 46m 24s
  So far, so good. Still a number of things left to do, but a functional toolhead and functional print capability is a real plus.
  Toolhead has working dual filament sensors (Filametrix) but don't have the cutter in use, the gantry piece isn't even installed yet. ERCF build getting started.

  Much of the progress has been documented here. (Doomcube discord.)
  https://discord.com/channels/825469421346226226/1256336493350223985

4/6/2024: placed order with dllpdf:
  DoomCube2 panel set:
    Back: ACM Black (with black core)
    Sides: Gray (smoked) PC (Lexan)
    Door: Clear PC (Lexan)
    Deck Panel Top: White ACM with Black core
    Deck Panel Bottom: Black ACM with Black core
    Cover Top and Bottom: Gray (smoked) PC (Lexan)
    Z Build area: +100mm (+$10.00)
    Frame Size: 300mm (+$15.00)
  Voron 2.4 Frame
    DOOM IT!!: Oh Heck Yes - DOOM IT!!! (+$100.00)
    Z Build area: +100mm (+$7.50)
    Frame Size: 300mm (+$15.00)
    Color: Copper Chop

Config notes:
  - debian bullseye rolled out NetworkManager (for bookworm, this is now default). Suspect /network/interfaces.d/can0 references ifconfig for txqueuelen that's being ignored.
    dsavlin@doomcube:/etc/network/interfaces.d $ cat can0
      allow-hotplug can0
        iface can0 can static
      bitrate 1000000
      up ifconfig  txqueuelen 128

      dsavlin@doomcube:/etc/network/interfaces.d $ ifconfig can0
        can0: flags=193<UP,RUNNING,NOARP>  mtu 16
          unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  txqueuelen 10  (UNSPEC)
    Changed "up ifconfig txqueuelen 128" to "up ip link set $IFACE txqueuelen 128" and rebooted pi.
    This seems to have had the desired effect, txqueuelen is now 128 in the output from ifconfig.
    Why? Was getting "mcu: timer too close" shutdowns by merely homing axis.

3/27/2025: long overdue updates. 519h 19m 55s total print time
  - Current status:
    a. Filametrix toolhead with pre- and post-extruder filament sensors using G2E and lever switches. (https://github.com/juliusjj25/G2E-Filametrix-Lever-Switch-Mod)
    b. A drive frame has broken cable retainer. (Considering going umbilical for Z chain too. Maybe.)
    c. Hot end is Rapido HF (gen1). If it breaks, will switch to Bambu hot end. Much less expensive, performs about the same, according to the Internet.
    d. Consider moving CM4 Pi to on board the Leviathan controller, or, perhaps, buy a CM4 PoE/UPS board.

- Items to work on:
    a. Replace belts. One front idler was crooked and led to some shredding. Fixed the crooked but belts are still there, no longer shedding material.
    b. Replace thermistor on the chamber heater with flat thin film one mounted closer to heater core.
    c. Add thermistor to top deck panel; maybe add thermistor to toolhead (requires running 2 wires, might not get done anytime soon)
    d. Remove camera USB cable from bottom deck. There's nowhere to mount a camera down that way.
    e. Blobifier with gantry-mounted brush holder (tbd)
    f. Box Turtle build continues