klipper - 多色列印

參考 Prusaslicer 的 Color change。可以在要換顏色的層手動插入 G-code M600。 對應 M600 macro 要做的事，暫停列印，退出 filament，發出 "嗶" 聲。等換好線後，載入 filament，然後按恢復列印。

Klipper 的 macro 可以參考 klipper/config/sample-macros.cfg，將對應 M600 的段落擷取如下

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######################################################################

# Filament Change

######################################################################

# M600: Filament Change. This macro will pause the printer, move the

# tool to the change position, and retract the filament 50mm. Adjust

# the retraction settings for your own extruder. After filament has

# been changed, the print can be resumed from its previous position

# with the "RESUME" gcode.

[pause_resume]

[gcode_macro M600]

gcode:

    {% set X = params.X|default(50)|float %}

    {% set Y = params.Y|default(0)|float %}

    {% set Z = params.Z|default(10)|float %}

    SAVE_GCODE_STATE NAME=M600_state

    PAUSE

    G91

    G1 E-.8 F2700

    G1 Z{Z}

    G90

    G1 X{X} Y{Y} F3000

    G91

    G1 E-50 F1000

    RESTORE_GCODE_STATE NAME=M600_state

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G90 - Absolute Mode；G91 - Relative Mode

G0, G1 - Linear Move

G1 [E<pos>] [F<rate>] [X<pos>] [Y<pos>] [Z<pos>]