6.1.3 Automatic operation
Normal automatic operational procedure:
1. Prepare 3D model:
a. Prepare a model in any CAD/CAM software. Model must consist of center lines
b. Export model as STP or IGS file format
c. Import STP or IGS to COBOD slice, set parameters and output G-code (see section 6.1.4.4).
2. Prepare printer
a. Make sure printer is on, without errors and homed to the desired position (see section
6.1.4.2)
3. Perform a “Dry run” (test print without material)
WARNING: REMOVE MIXING SHAFT FROM HOPPER BEFORE PERFORMING THE NEXT STEP
a. In Duet Web Interface (when connected to printer), select “upload and print” on home
screen.
b. Locate the sliced G-code file from step 1.c. and select this.
c. The printer will upload and immediately start printing (without material)
d. Observe the first 2-3 layers, that the printer is performing as expected
4. Prepare material
a. Use either a manual mixer, a cyclone mixer or a mixing pump (i.e. m-tec Duomix 2000)
b. Ensure that the material has the right consistency and water amount before adding it to
the pump
5. Print model
a. Re-insert the drive-axle into the hopper
b. Fill mixed material into pump and extrude a small amount manually using the “extrude”
button in the control panel to ensure that nozzle is primed, and material has the right
consistency.
c. Start print (see step 3.b.-d.)
d. Ensure that hopper always has enough material if in manual mode. In automatic mode
(using m-tec mixer-pump), this is controlled automatically.
If unexpected halt has caused print to stop, ensure material does not clog the hose or pump units
by both pumping and extruding material for 5-10 seconds every 2 minutes during machine stops.
6. Clean machine thoroughly after printing
a. See section 7.3.
6.1.4 User interface
The BOD2 printer has two options for controlling the machine.
1. Using the touch panel mounted on the E-box
2. Using a web interface controller
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