Just thaught I’d share my Prusaslicer start and end gcode for J1. It’s based of @macdylan work (thank you!). I made it a little simpler to better suit my preferences.
No mystery heating temps.
No purging of the nozzle while sitting “mid-air”. It now heats on top of the ooze blocker and moves directly to the purge line when it has reached printing temp.
No purge blob. Just a simple purge line in x-direction.
For the end gcode I just lowered the retraction amount.
Start gcode:
; Model: Snapmaker J1 ({nozzle_diameter[0]}/{nozzle_diameter[1]})
; Printer : [printer_preset]
; Profile : [print_preset]
; Plate : [physical_printer_preset]
; — initial_extruder: [initial_extruder]
; — has_wipe_tower: [has_wipe_tower]
; — total_toolchanges: [total_toolchanges]
; — T0: {is_extruder_used[0]}
; — T1: {is_extruder_used[1]}
M201 X[machine_max_acceleration_x] Y[machine_max_acceleration_y] Z[machine_max_acceleration_z] E[machine_max_acceleration_e]
M203 X[machine_max_feedrate_x] Y[machine_max_feedrate_y] Z[machine_max_feedrate_z] E[machine_max_feedrate_e]
M204 P[machine_max_acceleration_extruding] R[machine_max_acceleration_retracting] T[machine_max_acceleration_travel]
M205 X[machine_max_jerk_x] Y[machine_max_jerk_y] Z[machine_max_jerk_z] E[machine_max_jerk_e]
T[initial_extruder]
M205 V20 ; Junction Deviation (mm)
; Set IDEX mode if necessary
{if physical_printer_preset =~/.IDEXDupl./ || physical_printer_preset =~/.IDEXCopy./ }
M605 S2 X162 R0 ; IDEX Duplication
{elsif physical_printer_preset =~/.IDEXMirr./}
M605 S3 ; IDEX Mirror
{elsif physical_printer_preset =~/.IDEXBack./}
M605 S4 ; IDEX Backup
{endif}
; ----------------------------
; Step 1: Home all axes while heating the bed
; ----------------------------
G28 ; Home all axes
; ----------------------------
; Step 2: Set bed temperature and wait
; ----------------------------
M140 S{first_layer_bed_temperature[initial_extruder]}
M190 S{first_layer_bed_temperature[initial_extruder]} ; Wait for bed to reach temp
; ----------------------------
; Step 3: Heat the extruder
; ----------------------------
{if is_extruder_used[0]}M104 T0 S{first_layer_temperature[0]}{endif}
{if is_extruder_used[1]}M104 T1 S{first_layer_temperature[1]}{endif}
{if is_extruder_used[0]}M109 T0 S{first_layer_temperature[0]}{endif}
{if is_extruder_used[1]}M109 T1 S{first_layer_temperature[1]}{endif}
; ----------------------------
; Step 4: Purge Line for Each Extruder (Only on X-axis)
; ----------------------------
; Purge Line for Extruder 0 (if used)
{if is_extruder_used[0]}
T0
G28 X ; Re-home X to ensure correct position
G0 Z2.0 F300.0 ; Raise to Z2.0 before moving
G1 X142.0 F2660.0 ; Move to purge line start position (1/3 speed)
G1 Z0.2 F240.0 ; Lower back to purge start height
G1 E1 F200 ; Start extruding
G1 X10 E9.47915 F2660.0 ; Draw purge line along X-axis (1/3 speed)
G1 E-0.2 F200 ; Retract slightly
G92 E0 ; Reset extruder position
{endif}
; Purge Line for Extruder 1 (if used)
{if is_extruder_used[1]}
T1
G28 X ; Re-home X to ensure correct position
G0 Z2.0 F300.0 ; Raise to Z2.0 before moving
G1 X182.0 F2660.0 ; Move to purge line start position (1/3 speed)
G1 Z0.2 F240.0 ; Lower back to purge start height
G1 E1 F200 ; Start extruding
G1 X314 E9.47915 F2660.0 ; Draw purge line along X-axis (1/3 speed)
G1 E-0.2 F200 ; Retract slightly
G92 E0 ; Reset extruder position
{endif}
; ----------------------------
; Step 5: Select initial extruder before printing
; ----------------------------
T[initial_extruder]
; Ready to print!
End gcode:
G92 E0
G0 Z{max_layer_z + 2.0} F600
; retract the filament
G0 E-0.6 F200
G28
{if is_extruder_used[0]}M104 T0 S0{endif}
{if is_extruder_used[1]}M104 T1 S0{endif}
M140 S0
M107
M220 S100
M84
;
; DON’T REMOVE these lines if you’re using the smfix (GitHub - macdylan/SMFix: SMFix is a post-processing tool for PrusaSlicer/SuperSlicer/OrcaSlicer designed to be compatible with Snapmaker printers.)
; min_x = [first_layer_print_min_0]
; min_y = [first_layer_print_min_1]
; max_x = [first_layer_print_max_0]
; max_y = [first_layer_print_max_1]
; max_z = [max_layer_z]
; total_layer_number = [layer_num]
;
