Prusa MK3S MMU2S purge bucket _NEW version

It's a remix from my original design (https://www.prusaprinters.org/fr/prints/16909-prusa-mk3s-mmu2s-purge-bucket)

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, here : https://www.thingiverse.com/thing:4704964)

HARDWARE PART :

1. Add screw on the trigger (according to the trigger used)
2. Add rubber band (or spring) between holder and spacer
3. Add screw on the spacer to hold the bucket (need adjustment after the installation)
4. Remove Z-axis top right
5. Remove rod 8mm
6. Install holder with spacer and trigger
7. Put the rod 8mm (be careful with bearing)
8. Replace Z-axis top right by the new part
9. Check rotation if it's free. It's NOK, check that all supports on holder are removed. (I know, it's not easy...)
10. Adjust position of the bucket and the screw on the trigger

11. Perform a Calibration Z.

    It's finished for the Hardware part!

SOFTWARE PART:

1. Go to "Print Settings" and uncheck "Wipe tower"
2. 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

;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 F454
G1 E-20.000 F303
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
G4 S0
G1 E12 F1440 ;filament support
G1 E42 F1011 ;acceleration for nozzle loading
G1 E6 F708
G1 E40 F250 ;nozzle purge
G1 E60 F300 ;nozzle purge
G1 E3 F350
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}
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}

This G-code is a mix from G-code from JiVo and G-code from BigBrain3d.

It's finished for the Software part and this installation !

Slice and test !

Print instructions

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