BIQU B1 Y Axis Belt Cover for Auto Part Ejection

This cover is great if you want to automate your BIQU B1 to run 24/7! You will also need to:
-Use my part ejector which bolts to the print head
-Use a bed clearing script at the end of your G-code (or for OctoPrint users, use the 'continuous print' plugin). Mine is listed at the end of this text.
-Chang your start G code to prime off the edge of the bed to prevent build up of filament. Mine is listed at the end of this text.

This particular model covers the Y axis belt, so that parts do not get jammed in there when they are automatically ejected.

The two halves are connected using two 6mm x 30mm wooden dowels. Once assembled a flat platform is created which allows the parts to slide off easily.

As it sits very close to the heated bed, I would recommend using PETG to prevent warping.

Bed Clearing Script:
M140 S0 ;turn off heated bed
G4 S1800 ;wait for 30 mins
M17 ;enable steppers
G90 ;back to absolute positioning
G28 X Y ;home XY
G1 X119 Y238 F6000 ;move to centre back
G1 Z1 F2000 ;move Z down
G1 Y40 F1000 ;eject
G1 Y238 F6000 ;return to back
G1 X79 F6000 ;move left -40
G1 Y40 F2000 ;eject
G1 Y238 F6000 ;return to back
G1 X159 F6000 ;move right +40
G1 Y40 F2000 ;eject
G1 Y238 F6000 ;return to back
G1 X39 F6000 ;move left -80
G1 Y40 F2000 ;eject
G1 Y238 F6000 ;return to back
G1 X199 F6000 ;move right +80
G1 Y40 F2000 ;eject
G1 Y238 F6000 ;return to back

Start G-code Script (THIS USES UBL LEVELLING!!! You may need to change it!):
; BIQU B1 Start G-code
M117 Heating Bed and Nozzle
M140 S{material_bed_temperature_layer_0} ; Set Heat Bed temperature
M104 S{material_standby_temperature} ; Set Nozzle temperature
M190 S{material_bed_temperature_layer_0} ; Wait for Heat Bed temperature
G92 E0 ; Reset Extruder
M117 Homing
G28 ; Home all axes

M117 3 Point Plane Probing
G29 A
G29 L1
G29 J

M117 Heating Nozzle
M104 S{material_print_temperature_layer_0} ; Set Extruder temperature
G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed
G1 X0 Y0 F5000.0 ; Move to bottom left corner
G1 Z0.0 F5000.0 ; Move to Z0
M109 S{material_print_temperature_layer_0} ; Wait for Tool temperature
G92 E0 ; Reset Extruder

M117 Purging
G1 E30 F300 ; Purge off the side of the bed
G92 E0 ; Reset Extruder
;G1 E{-retraction_amount} F{retraction_speed} ; Retract by users settings
G1 X15 F300 ; Move onto bed to wipe nozzle
G1 Z0.2 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed

M117 Beginning Print

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