Ideas on boosting speed for multi-color printing with AMS

Bambu Lab X Series User mods
56

Many thanks for you feedback, I have done some tests and get good results tool :slight_smile:

I did a last modification, here is probably the latest version (I have also updated my MR to Bambu Github) :

I cant post any new images now on the forum … forum block it, but I tried lite green text thinner than 0.4mm over a black backgroung and I cant see any default !

EDIT: now I can post :slight_smile:
Printed without purge tower and new filament g-code

image
image1036×559 110 KB

END EDIT

What’s your overall PTFE length ?

50 seconds spunds good, but 100 seconds look very slow, did you have to purge more than 650mm³ ? I think that the maximum I have used from black to white was 650mm³

Printer : Change Filament g-code

M620 S[next_extruder]A
M204 S9000
{if toolchange_count > 1 && (z_hop_types[current_extruder] == 0 || z_hop_types[current_extruder] == 3)}
G17
G2 Z{z_after_toolchange + 0.4} I0.86 J0.86 P1 F10000 ; spiral lift a little from second lift
{endif}
G1 Z{max_layer_z + 3.0} F1200 ;** only requiered when printing by object ?! otherwise going + 0.5mm should be enought


M106 P1 S0
M106 P2 S0
;M104 S[nozzle_temperature_range_high] ;** Change temp to max without waiting, waiting would take age for nothing
;M104 S275 ;** Change temp to 275°c without waiting, waiting would take age for nothing



;** Go to cutting current filament position
;**G1 X20 Y50 F24000 ;**doing in two path to avoid problem on cutter actuator

G1 X20 F18000
G1 Y50 F18000
G1 Y-3

{if toolchange_count == 2}
; get travel path for change filament
M620.1 X[travel_point_1_x] Y[travel_point_1_y] F24000 P0
M620.1 X[travel_point_2_x] Y[travel_point_2_y] F24000 P1
M620.1 X[travel_point_3_x] Y[travel_point_3_y] F24000 P2
{endif}

M620.1 E{old_filament_e_feedrate * 3} T{new_filament_temp}

M104 S[new_filament_temp] ; Nozzle will change its temperature while filament is loaded/unloaded

T[next_extruder] ;Cut and change filament

M620.1 E{new_filament_e_feedrate * 3} T{new_filament_temp}



{if next_extruder < 255}
G92 E0 ;** reset extruder pos, perfect after T

{if flush_length_1 > 1}
; FLUSH_START 1
{if flush_length_1 > 23.7}
G1 E22.7 F{old_filament_e_feedrate * 1.5} ; do not need pulsatile flushing for start part
G1 E0.2 F120
G1 E{(flush_length_1 - 22.7) * 0.25} F{old_filament_e_feedrate * 1.5}
G1 E0.2 F120
G1 E{(flush_length_1 - 22.7) * 0.25} F{new_filament_e_feedrate * 1.5}
G1 E0.2 F120
G1 E{(flush_length_1 - 22.7) * 0.25} F{new_filament_e_feedrate * 1.5}
G1 E0.2 F120
G1 E{(flush_length_1 - 22.7) * 0.25} F{new_filament_e_feedrate * 1.5}
G1 E0.2 F120
{else}
G1 E{flush_length_1} F{old_filament_e_feedrate * 1.5}
{endif}
; FLUSH_END
{endif}

{if flush_length_2 > 1}
; FLUSH_START 2
G1 E{(flush_length_2 - 1) * 0.25} F{new_filament_e_feedrate * 1.5}
G1 E0.25 F120
G1 E{(flush_length_2 - 1) * 0.25} F{new_filament_e_feedrate * 1.5}
G1 E0.25 F120
G1 E{(flush_length_2 - 1) * 0.25} F{new_filament_e_feedrate * 1.5}
G1 E0.25 F120
G1 E{(flush_length_2 - 1) * 0.25} F{new_filament_e_feedrate * 1.5}
G1 E0.25 F120
; FLUSH_END 2
{endif}

{if flush_length_3 > 1}
; FLUSH_START 3
G1 E{(flush_length_3 - 1) * 0.25} F{new_filament_e_feedrate * 1.5}
G1 E0.25 F120
G1 E{(flush_length_3 - 1) * 0.25} F{new_filament_e_feedrate * 1.5}
G1 E0.25 F120
G1 E{(flush_length_3 - 1) * 0.25} F{new_filament_e_feedrate * 1.5}
G1 E0.25 F120
G1 E{(flush_length_3 - 1) * 0.25} F{new_filament_e_feedrate * 1.5}
G1 E0.25 F120
; FLUSH_END 3
{endif}

{if flush_length_4 > 1}
; FLUSH_START 4
G1 E{(flush_length_4 - 1) * 0.25} F{new_filament_e_feedrate * 1.5}
G1 E0.25 F120
G1 E{(flush_length_4 - 1) * 0.25} F{new_filament_e_feedrate * 1.5}
G1 E0.25 F120
G1 E{(flush_length_4 - 1) * 0.25} F{new_filament_e_feedrate * 1.5}
G1 E0.25 F120
G1 E{(flush_length_4 - 1) * 0.25} F{new_filament_e_feedrate * 1.5}
G1 E0.25 F120
; FLUSH_END 4
{endif}



;**G1 E2 F{new_filament_e_feedrate} ;Compensate for filament spillage during waiting temperature
G1 E1 F30 ;Compensate for filament spillage during two second

M109 R[new_filament_temp]

M106 P1 S255
G92 E0
G1 E-[new_retract_length_toolchange] F1800

G1 Y255 F18000
G1 X80 F18000
G1 X60 F18000
G1 X80 F18000
G1 X60 F18000;shake to put down garbage
G1 X70 F18000
G1 X90 F18000

G1 Y255 F18000
G1 X100 F5000
G1 Y265 F5000
G1 X70 F18000
G1 X100 F18000
G1 X70 F18000
G1 X100 F18000
G1 X165 F18000;wipe and shake
G1 Y256 ; move Y to aside, prevent collision



G1 Z{max_layer_z + 3} F3000
{if layer_z <= (initial_layer_print_height + 0.001)}
M204 S[initial_layer_acceleration]
{else}
M204 S[default_acceleration]
{endif}
{else}
G1 X[x_after_toolchange] Y[y_after_toolchange] Z[z_after_toolchange] F18000
{endif}
M621 S[next_extruder]A

EDIT : g-code updated 26/04/2023
EDIT : g-code updated 28/04/2023
EDIT : g-code updated 08/05/2023
EDIT : g-code updated 24/09/2023

PR made for Bambustudio, if you want to vote :slight_smile: