;===========================================================
;===== S-Start G-code for Bambu Lab P1S WITH AMS ===========
;===== Author: Justagwas ===================================
;===== Date: 2026-01-24 ====================================
;===========================================================

; This start script is the "S" profile for the Bambu Lab P1S.
; It enables runout and resonance compensation, and sets default motor currents,
; feedrate, flow, and fan defaults.
; It heats the bed and nozzle, homes the printer, then performs AMS load and tuning.
; The nozzle is primed, purged briefly, retracted, and wiped with a short wipe sequence.
; Bed leveling compensation is enabled using the last known mesh (no validation or probing).
; It then primes near the front of the bed, retracts slightly, and leaves the printer ready to print.

;===== DEFAULTING ==========================================
G90                              ; Absolute positioning mode
M83                              ; Relative extrusion mode
M17 X1.2 Y1.2 Z0.75              ; DEFAULT MOTOR CURRENTS DO NOT CHANGE
M290 X40 Y40 Z2.6666666          ; DEFAULTS DO NOT CHANGE
M220 S100                        ; Feedrate 100%
M221 S100                        ; Flow rate 100%
M73.2 R1.0                       ; Reset print time calculation
M1002 set_gcode_claim_speed_level :5  ; Internal speed mode
M221 X0 Y0 Z0                    ; Reset flow modifiers per axis
; G29.1 Z{-0.02}                   ; Z-offset -0.02mm - negative=closer to bed, positive=farther
; ^ Currently not in use because of ";"

;===== Enable filament runout detection ====================
M412 S1                          ; Enable runout sensor (S0=disable)
M975 S1                          ; Enable resonance compensation (S0=disable)

;===== Turn on fans to safe defaults =======================
M106 P1 S125                     ; Part cooling fan 49% (0-255 scale)
M106 P2 S50                      ; Aux fan 20% (0-255 scale)
M106 P3 S125                     ; Chamber fan 49% (0-255 scale)
M710 A1 S255                     ; Controller fan AUTO

;===== Begin heating quickly ===============================
M1002 gcode_claim_action :2      ; Declare heating action
M140 S[bed_temperature_initial_layer]  ; Start bed heating (non-blocking)
M104 S[nozzle_temperature_initial_layer] ; Begin heating nozzle to final print temp (non-blocking)

;===== Home all axes =======================================
G28                              ; Home X, Y and Z

;===== Prepare AMS (force reload) ==========================
M1002 gcode_claim_action :4      ; Declare AMS action
M620 M                           ; AMS: enter manual mode
M620 S[initial_extruder]A        ; AMS: select extruder slot
T[initial_extruder]              ; Activate tool
M621 S[initial_extruder]A        ; AMS: confirm filament loaded
M620.1 E F{filament_max_volumetric_speed[initial_extruder]/2.4053*60} T{nozzle_temperature_range_high[initial_extruder]}

;===== Declare purge action ================================
M1002 gcode_claim_action :14     ; Declare wipe/purge action
M400                             ; Wait

;===== Move to purge area quickly ==========================
G1 X65 Y265 F9000                ; Move to purge position at 9000mm/min
M109 S[nozzle_temperature_initial_layer]  ; Wait until nozzle reaches print temp
M106 P1 S255                     ; Part fan to 100% for purging
G92 E0                           ; Reset extruder position
G1 E2 F150                       ; Extrude 2mm at 150mm/min (prime nozzle)
G4 S1                            ; Dwell 1s

;===== Minimal purge and retraction ========================
G92 E0                           ; Reset extruder
G1 E8 F300                       ; Extrude 8mm to clear nozzle
G4 S2                            ; Dwell 2s
M400                             ; Wait
G92 E0                           ; Reset extruder
G1 E-3 F300                      ; Retract 3mm to relieve pressure
M400                             ; Wait

;===== Quick wipe sequence =================================
G1 X70 F9000                     ; Wipe to X70
G1 X95 F12000                    ; Wipe to X95
G1 X70 F9000                     ; Back to X70
G1 X95 F12000                    ; Another quick wipe
G1 X70 F9000                     ; Back
M400                             ; Wait for wipes to finish
G1 E-5 F200                      ; Retract 5mm
G1 X88 F8000                     ; Move to X88
G1 X89 F1000                     ; Precise positioning
G4 S2                            ; Dwell 2 seconds

;===== Lower fan to normal and finish purge ================
M106 P1 S150                     ; Reduce part fan to ~59%

;===== Reset purge action ==================================
M1002 gcode_claim_action :0      ; Clear purge action

;===== Bed levelling  ======================================
G29.2 S1                         ; Enable bed leveling compensation

;===== Move to front and prime for print ===================
M109 S[nozzle_temperature_initial_layer]  ; Wait until print temperature (blocking)
G1 Z4 F1200                      ; Lift Z to 4mm
G1 X150 Y20 F9000                ; Move near front of bed at high speed
G92 E0                           ; Reset extruder
G1 E4 F200                       ; Prime 4mm
G1 E-0.5 F120                    ; Retract 0.5mm to prevent oozing
M400                             ; Ensure prime completed

;===== Final state =========================================
; M106 P1 S0                       ; Part cooling fan OFF
; M106 P2 S0                       ; Aux / chamber fan OFF
M400                             ; Wait
M975 S1                          ; Keep resonance compensation enabled
; END