The Random Thoughts of a Geek heading for Banbury
The Random Thoughts of a Geek heading for Banbury

OctoPrint and an Ultimaker 2

Ultimaker 2 with R-Pi and PiCam
OctoPrint Logo
OctoPrint Logo

A while ago work bought an Ultimaker 2 to produce cool things at work, A Raspberry Pi B+, and Pi Cam were also acquired for it with a view to using OctoPi (a copy of OctoPrint developed for the R-Pi).

OctoPi can be downloaded from the official mirror, and burnt to an Micro SD card using these instructions, and set up the WiFi card to connect to the work network, the Unit does not have VNC installed, as the OctoPi software does not require desktop access to the R-Pi.

Once the card is set up, I made a shell script I have called in the home directory to make it easy to keep the version of OctoPi up to date with the development branch:

cd ~/OctoPrint
git pull && git checkout devel
~/oprint/bin/python install
sudo service octoprint restart
Ultimaker 2 with R-Pi and PiCam
Ultimaker 2 with R-Pi and PiCam

Setting up the Ultimaker2 with the R-Pi by plugging the 3D printer into one of the USB ports, and the WiFi card into the other.

(The Case is from ThingiVerse), I also plan on making a clip to hold the camera and the PiCam to the side of the printer to allow the camera to get a good angle for the TimeLaps videos.

I hope to be able to print natively from OctoPi, As the Ultimaker uses GCodeFlavor UltiGCode, where as OctoPrint only supports RepRap (Volumetric).

The settings to connect to the 3D Printer are

  • Serial Port: /dev/ttyACM0
  • baudrate: 250000.

The Start GCode in Cura is:

;Sliced at: {day} {date} {time}
;Basic settings: Layer height: {layer_height} Walls: {wall_thickness} Fill: {fill_density}
;Print time: {print_time}
;Filament used: {filament_amount}m {filament_weight}g
;Filament cost: {filament_cost}
;M190 S{print_bed_temperature} ;Uncomment to add your own bed temperature line
;M109 S{print_temperature} ;Uncomment to add your own temperature line
G21        ;metric values
G90        ;absolute positioning
M82        ;set extruder to absolute mode
M107       ;start with the fan off
G28 X0 Y0  ;move X/Y to min endstops
G28 Z0     ;move Z to min endstops
G1 Z15.0 F{travel_speed} ;move the platform down 15mm
G92 E0                  ;zero the extruded length
G1 F200 E3              ;extrude 3mm of feed stock
G92 E0                  ;zero the extruded length again
G1 F{travel_speed}
;Put printing message on LCD screen
M117 Printing...

While Printing this test piece the extruder made a whipping noise, and the print was not clean:

Looking at the settings in Cura, I changed the temperatures to Printing Temperature 180, and the Bed Temperature of 60, and uncommented the two temperature lines (M190, and M109) in the start.gcode file.

Running a second print with the same test piece has cleaned up the fluffiness, but it is still extruding too much.

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