; 03-Change_Filament
;
if heat.heaters[1].current < heat.coldExtrudeTemperature               ; check extrude temperature
    if heat.heaters[1].current < heat.coldRetractTemperature           ; check retract temperature
        M291 P"Hotend too cold. Preheat extruder first!" S2            ; ask to preheat extruder
        M99
;
if state.status == "processing"                                        ; printer is currently printing!
    M25                                                                ; pause printing
    M400                                                               ; finish all moves, clear the buffer.
else
    T0                                                                 ; select tool 0
    if !move.axes[0].homed || !move.axes[1].homed || !move.axes[2].homed
        G28                                                            ; home all axes without mesh bed level
;
var sensor_flag = 0                                                    ; create variable sensor_flag
;
G90                                                                    ; set absolute positioning
if  {move.axes[2].machinePosition < 80}                                ; if z position is below 80mm
    G1 X200 Y0 Z80 F6000                                               ; go to the parking position
else
    G1 X200 Y0 F6000                                                   ; go to the parking position
;
M400                                                                   ; finish all moves, clear the buffer
;
if heat.heaters[1].current < heat.coldExtrudeTemperature               ; check extrude temperature
    if heat.heaters[1].current < heat.coldRetractTemperature           ; check retract temperature
        M291 P"Hotend too cold. Preheat extruder first!" S2            ; ask to preheat extruder
        M99
;
; disable run-out sensor if active
;
if {move.axes[0].workplaceOffsets[8] == 1}                             ; if filament sensor is active
    if exists(sensors.filamentMonitors[0])                             ; in run-out mode?
       M591 D0 P0 C"e0stop" S0                                         ; disable filament runout sensor
       M950 J1 C"nil"                                                  ; free input 1 e0 filament sensor
;
M291 R"Changing Filament..." P"Press OK to start or CANCEL to abort." S3  ; display message
;
M83                                                                    ; set extruder to relative positioning
M913 E100                                                              ; set motor current to 100% of set current;
;
G1 E25 F300                                                            ; extrude 25mm of filament at 300mm/min
G1 E-18 F3000                                                          ; retract 18mm of filament at 3000mm/min
G1 E-95 F2000                                                          ; retract 95mm of filament at 2000mm/min
;
M400                                                                   ; finish all moves, clear the buffer
;
M291 P"Please pull out filament!" S2                                   ; ask pull out filament
;
if {move.axes[0].workplaceOffsets[8] == 1}                             ; if filament sensor is active
    if {move.axes[1].workplaceOffsets[8] == 1}                         ; if autoload is active
        M98 P"0:/sys/00-Functions/ActivateAutoload"                    ; activate autoload
;
if {move.axes[0].workplaceOffsets[8] == 1}                             ; if filament sensor is enabled
    if {move.axes[1].workplaceOffsets[8] == 1}                         ; if autoload is enabled
        M291 P"Insert filament...." S1 T5                              ; display new message
        M300 S500 P600                                                 ; beep
        while {var.sensor_flag = 0}
           G4 P1000                                                    ; wait 1000 milliseconds
           if exists(sensors.filamentMonitors[0])                      ; if filament sensor is detected in object model
               set var.sensor_flag = 1                                 ; set flag to 1
    else
        M291 R"Insert filament." P"Press OK to start feeding filament..." S2  ; display new message
        M300 S500 P600                                                 ; beep
        M291 P"Feeding filament.... " S1 T15                           ; display new message
        G91                                                            ; set to Relative Positioning
        G1 E90 F300                                                    ; feed 90mm of filament at 300mm/mi
        G1 E15 F200                                                    ; feed 15mm of filament at 200mm/min
        M400
        M98 P"0:/macros/01-Filament_Handling/02-Purge_Filament"
;
if {move.axes[0].workplaceOffsets[8] == 0}
    M291 R"Insert filament." P"Press OK to start feeding filament..." S2  ; display new message
    M300 S500 P600                                                     ; beep
    M291 P"Feeding filament.... " S1 T15                               ; display new message
    G91                                                                ; set to Relative Positioning
    G1 E90 F300                                                        ; feed 90mm of filament at 300mm/mi
    G1 E15 F200                                                        ; feed 15mm of filament at 200mm/min
    M400
    M98 P"0:/macros/01-Filament_Handling/02-Purge_Filament"
;
M400                                                                   ; finish all moves, clear the buffer
;
G1 E-0.5 F400                                                          ; retract 0.5mm of filament at 400mm/min
;
M98 P"0:/sys/00-Functions/FilamentsensorStatus"                        ; update sensor status
;
if state.status == "paused"                                            ; printer is currently paused from printing!
    M291 P"Press OK to resume print." S2                               ; display message
    M24                                                                ; resume printing
;