Yes, I modified your json a little because I found some errors on log file (cura.log)
1. Version : 2-> 1
2. platform: use prusai3 stl file.
Here is mine:
{
"id": "aurora_a3",
"version": 1,
"name": "Aurora A3",
"inherits": "fdmprinter",
"visible": true,
"author": "Zhu Da Hai",
"manufacturer": "Other",
"category": "Other",
"file_formats": "text/x-gcode",
"icon": "icon_ultimaker2",
"platform": "prusai3_platform.stl",
"overrides": {
"machine_heated_bed": {
"default_value": true
},
"machine_width": {
"default_value": 240
},
"machine_height": {
"default_value": 180
},
"machine_depth": {
"default_value": 240
},
"machine_center_is_zero": {
"default_value": false
},
"machine_nozzle_size": {
"default_value": 0.4
},
"material_diameter": {
"default_value": 1.75
},
"machine_nozzle_heat_up_speed": {
"default_value": 2
},
"machine_nozzle_cool_down_speed": {
"default_value": 2
},
"machine_head_polygon": {
"default_value": [
[-75, -18],
[-75, 35],
[18, 35],
[18, -18]
]
},
"gantry_height": {
"default_value": 55
},
"machine_gcode_flavor": {
"default_value": "RepRap (Marlin/Sprinter)"
},
"machine_start_gcode": {
"default_value": "G21 ;metric values\nG90 ;absolute positioning\nM82 ;set extruder to absolute mode\nM107 ;start with the fan off\nM205 X10 ;Jerk to 10\nM204 S500 ;Accel to 500\nG28 X0 Y0 ;move X/Y to min endstops\nG28 Z0 ;move Z to min endstops\nG1 Z15.0 F9000 ;move the platform down 15mm\nG1 X36 Y36 ;Move to print origin\nG92 X0 Y0 Z15.0 ;Set this coordinate to 0,0,15\nG92 E0 ;zero the extruded length\nG1 F200 E3 ;extrude 3mm of feed stock\nG92 E0 ;zero the extruded length again\nG1 F9000\n;Put printing message on LCD screen\nM117 Printing..."
},
"machine_end_gcode": {
"default_value": "M104 S0 ;extruder heater off\nM140 S0 ;heated bed heater off (if you have it)\nG91 ;relative positioning\nG1 E-1 F300 ;retract the filament a bit before lifting the nozzle, to release some of the pressure\nG1 Z+0.5 E-5 X-20 Y-20 F9000 ;move Z up a bit and retract filament even more\nG28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way\nM84 ;steppers off\nG90 ;absolute positioning"
},
"retraction_speed": {
"maximum_value": "101"
},
"machine_disallowed_areas": {
"default_value": [
[[-120.00, 0.00], [-119.34, -12.43], [-119.34,-120.00], [-120.00,-120.00]],
[[-119.34, -12.43], [-117.37, -24.94], [-117.37,-120.00], [-119.34,-120.00]],
[[-117.37, -24.94], [-114.12, -37.08], [-114.12,-120.00], [-117.37,-120.00]],
[[-114.12, -34.08], [-109.62, -48.80], [-109.62,-120.00], [-114.37,-120.00]],
[[-109.62, -48.80], [-103.92, -60.00], [-103.92,-120.00], [-109.62,-120.00]],
[[-103.92, -60.00], [ -97.08, -70.53], [ -97.08,-120.00], [-103.92,-120.00]],
[[ -97.08, -70.53], [ -89.17, -80.29], [ -89.17,-120.00], [ -97.08,-120.00]],
[[ -89.17, -80.29], [ -80.29, -89.17], [ -80.29,-120.00], [ -89.17,-120.00]],
[[ -80.29, -89.17], [ -70.53, -97.08], [ -70.53,-120.00], [ -80.29,-120.00]],
[[ -70.53, -97.08], [ -60.00,-103.92], [ -60.00,-120.00], [ -70.53,-120.00]],
[[ -60.00,-103.92], [ -48.80,-109.62], [ -48.80,-120.00], [ -60.00,-120.00]],
[[ -48.80,-109.62], [ -37.08,-114.12], [ -37.08,-120.00], [ -48.80,-120.00]],
[[ -37.08,-114.12], [ -24.94,-117.37], [ -24.94,-120.00], [ -37.08,-120.00]],
[[ -24.94,-117.37], [ -12.54,-119.34], [ -12.54,-120.00], [ -24.94,-120.00]],
[[ -12.54,-119.34], [ 0.00,-120.00], [ -12.54,-120.00]],
[[ 120.00, 0.00], [ 119.34, 12.43], [ 119.34, 120.00], [ 120.00, 120.00]],
[[ 119.34, 12.43], [ 117.37, 24.94], [ 117.37, 120.00], [ 119.34, 120.00]],
[[ 117.37, 24.94], [ 114.12, 37.08], [ 114.12, 120.00], [ 117.37, 120.00]],
[[ 114.12, 34.08], [ 109.62, 48.80], [ 109.62, 120.00], [ 114.37, 120.00]],
[[ 109.62, 48.80], [ 103.92, 60.00], [ 103.92, 120.00], [ 109.62, 120.00]],
[[ 103.92, 60.00], [ 97.08, 70.53], [ 97.08, 120.00], [ 103.92, 120.00]],
[[ 97.08, 70.53], [ 89.17, 80.29], [ 89.17, 120.00], [ 97.08, 120.00]],
[[ 89.17, 80.29], [ 80.29, 89.17], [ 80.29, 120.00], [ 89.17, 120.00]],
[[ 80.29, 89.17], [ 70.53, 97.08], [ 70.53, 120.00], [ 80.29, 120.00]],
[[ 70.53, 97.08], [ 60.00, 103.92], [ 60.00, 120.00], [ 70.53, 120.00]],
[[ 60.00, 103.92], [ 48.80, 109.62], [ 48.80, 120.00], [ 60.00, 120.00]],
[[ 48.80, 109.62], [ 37.08, 114.12], [ 37.08, 120.00], [ 48.80, 120.00]],
[[ 37.08, 114.12], [ 24.94, 117.37], [ 24.94, 120.00], [ 37.08, 120.00]],
[[ 24.94, 117.37], [ 12.54, 119.34], [ 12.54, 120.00], [ 24.94, 120.00]],
[[ 12.54, 119.34], [ 0.00, 120.00], [ 12.54, 120.00]],
[[-120.00, 0.00], [-119.34, 12.43], [-119.34, 120.00], [-120.00, 120.00]],
[[-119.34, 12.43], [-117.37, 24.94], [-117.37, 120.00], [-119.34, 120.00]],
[[-117.37, 24.94], [-114.12, 37.08], [-114.12, 120.00], [-117.37, 120.00]],
[[-114.12, 34.08], [-109.62, 48.80], [-109.62, 120.00], [-114.37, 120.00]],
[[-109.62, 48.80], [-103.92, 60.00], [-103.92, 120.00], [-109.62, 120.00]],
[[-103.92, 60.00], [ -97.08, 70.53], [ -97.08, 120.00], [-103.92, 120.00]],
[[ -97.08, 70.53], [ -89.17, 80.29], [ -89.17, 120.00], [ -97.08, 120.00]],
[[ -89.17, 80.29], [ -80.29, 89.17], [ -80.29, 120.00], [ -89.17, 120.00]],
[[ -80.29, 89.17], [ -70.53, 97.08], [ -70.53, 120.00], [ -80.29, 120.00]],
[[ -70.53, 97.08], [ -60.00, 103.92], [ -60.00, 120.00], [ -70.53, 120.00]],
[[ -60.00, 103.92], [ -48.80, 109.62], [ -48.80, 120.00], [ -60.00, 120.00]],
[[ -48.80, 109.62], [ -37.08, 114.12], [ -37.08, 120.00], [ -48.80, 120.00]],
[[ -37.08, 114.12], [ -24.94, 117.37], [ -24.94, 120.00], [ -37.08, 120.00]],
[[ -24.94, 117.37], [ -12.54, 119.34], [ -12.54, 120.00], [ -24.94, 120.00]],
[[ -12.54, 119.34], [ 0.00, 120.00], [ -12.54, 120.00]],
[[ 120.00, 0.00], [ 119.34, -12.43], [ 119.34,-120.00], [ 120.00,-120.00]],
[[ 119.34, -12.43], [ 117.37, -24.94], [ 117.37,-120.00], [ 119.34,-120.00]],
[[ 117.37, -24.94], [ 114.12, -37.08], [ 114.12,-120.00], [ 117.37,-120.00]],
[[ 114.12, -34.08], [ 109.62, -48.80], [ 109.62,-120.00], [ 114.37,-120.00]],
[[ 109.62, -48.80], [ 103.92, -60.00], [ 103.92,-120.00], [ 109.62,-120.00]],
[[ 103.92, -60.00], [ 97.08, -70.53], [ 97.08,-120.00], [ 103.92,-120.00]],
[[ 97.08, -70.53], [ 89.17, -80.29], [ 89.17,-120.00], [ 97.08,-120.00]],
[[ 89.17, -80.29], [ 80.29, -89.17], [ 80.29,-120.00], [ 89.17,-120.00]],
[[ 80.29, -89.17], [ 70.53, -97.08], [ 70.53,-120.00], [ 80.29,-120.00]],
[[ 70.53, -97.08], [ 60.00,-103.92], [ 60.00,-120.00], [ 70.53,-120.00]],
[[ 60.00,-103.92], [ 48.80,-109.62], [ 48.80,-120.00], [ 60.00,-120.00]],
[[ 48.80,-109.62], [ 37.08,-114.12], [ 37.08,-120.00], [ 48.80,-120.00]],
[[ 37.08,-114.12], [ 24.94,-117.37], [ 24.94,-120.00], [ 37.08,-120.00]],
[[ 24.94,-117.37], [ 12.54,-119.34], [ 12.54,-120.00], [ 24.94,-120.00]],
[[ 12.54,-119.34], [ 0.00,-120.00], [ 12.54,-120.00]]
]
}
}
}