Prusa MK3S MMU2S purge bucket _NEW version by Forfelet

Last crawled date: 3 years, 3 months ago

It's a remix from my original design.
I redesigned the holder to match with my new X axis (https://www.thingiverse.com/thing:3670659)
Now, this purge bucket can be installed on all X axis versions (stock, Bear, ...)
Z-axis top right should be replace for that. STL is available (directly remixed from Prusa website).
To print correctly (PETG 0.2mm 20% grid), please print these parts according to the last picture. Don't print the Holder lying flat.
Holder : supports everywhere
Spacer: supports from build plate only
Trigger: no supports
Bucket: supports from build plate only
Materials needed:
1 screw M3x20 for trigger, but you can use the trigger without screw with stock extruder (not tested on others)
1 screw M3x4
1 rubber band or a spring 20.6x5.1. I advise you the spring.
Please follow this instruction list: (also available in Files with pictures)
HARDWARE PART :
Add screw on the trigger (according to the trigger used)
Add rubber band (or spring) between holder and spacer
Add screw on the spacer to hold the bucket (need adjustment after the installation)
Remove Z-axis top right
Remove rod 8mm
Install holder with spacer and trigger
Put the rod 8mm (be careful with bearing)
Replace Z-axis top right by the new part
Check rotation if it's free. It's NOK, check that all supports on holder are removed. (I know, it's not easy...)
Adjust position of the bucket and the screw on the trigger
Perform a Calibration Z.
It's finished for the Hardware part!
SOFTWARE PART:
In PrusaSlicer,
go to "Print Settings" and uncheck "Wipe tower"
go to "Printer Settings" and copy/paste this script in the tool change section:
; toolchange from [current_extruder] to [next_extruder], layer [layer_num]
{if current_extruder != next_extruder}
;before tool change
M106 S0 ;turn off fan
G92 E0 ;turn off retraction
G1 E-0.8 F2100 ;retract
G1 Y100 F12000 ;break filament before lifting
G1 X200 F12000 ;move head to position
; G91;change in relative position
{if layer_z < 25.0}
G1 Z26; z-lift if lower than 25 mm
{endif}
G90;transition to absolute position
G4 S0 ;clean up buffer movement
G1 X240 F12000 ;move head to purge area
G1 X250 F2000
G1 X254 F1000 ;extend the buscket
;end of pre-tool change gcode
; Start cleaning the filament before extraction
M220 B ; turn aux v1.0.5
M220 S100 ; change of loading tool
;(Replace tip shaping section if doing Vintagepc tip shaping)
;*Begin PLA Tip shaping*****
G1 E0.7644 F3639
G1 E0.8248 F3926
G1 E0.8483 F8483
G1 E-15.000 F6000
G1 E-24.500 F1200
G1 E-7.000 F600
G1 E-3.500 F360
{if layer_num < 1}
M104 S[first_layertemperature[nextextruder]] ; toolchange set the extruder temperature - first layer
{else}
M104 S[temperature[next_extruder]] ; toolchange set the extruder temperature - other layers
{endif}
G1 E20.000 F488
G1 E-20.000 F326
G1 E-35.000 F2000
G4 S0
;*End PLA Tip shaping*****
;---------------;
T[next_extruder] ;tool change
;start the purge after changing the tool
M107 ;turn off fan
G92 E0 ;reset the position of the extrusion
G1 E12 F400 ;filament support
G1 E50 F700 ;acceleration for nozzle loading
G1 E43 F150;nozzle purge,3
G1 E6 F180;nozzle purge E66 F200
G1 E11 F200;nozzle purge
G1 E10 F250;nozzle purge
G1 E10 F280;nozzle purge
G1 E3.0000 F300
G1 E3.0000 F350; retract 20mm at a speed of 110
M106 S255 ;turn on fan
G4 S2 ;cool the filament
G92 E0 ;reset the position of the extrusion
{if layer_num > 0}
G1 E-[retract_lengthtoolchange[next_extruder]] F1500 ;retract to avoid seepage
{else}
; no retraction on first toolchange
{endif}
{if layer_z > .25}
M106 S51
{endif}
G1 X240 F5000 ;bucket go back home
G1 X200 F12000 ;bucket go back home
M220 R ; restore speed
;end of tool purge gcode
{else}
; no extruder change
{endif}
It's finished for the Software part and this installation !
Slice and test !