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https://github.com/sorted01/Filametrix.git
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128 lines
6.2 KiB
INI
128 lines
6.2 KiB
INI
[gcode_macro CUT_FILAMENT]
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description: Cut filament by pressing the cutter on a fixed pin with a horizontal movement. Based on Thiscams macro but updated to work with HHv2
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#Modify the below settings in mmu_parameters.cfg
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#toolhead_sensor_to_nozzle: 62 this will need to be reduced to compensate for the extra filament letf in the nozzle so probably to 5 to 15mm shorter based on the variable_retract_length: below.
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#force_form_tip_standalone: will need to be set to 1 and all tip forming settings will need to be disabled in your slicer including ramming.
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#slicer_tip_park_pos: will need to be set just above the cutter slot.
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# Distance to retract prior to making the cut, this reduces wasted filament but might cause clog
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# if set too large and/or if there are gaps in the hotend assembly
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# This must be less than the distance from the nozzle to the cutter.
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variable_retract_length: 35
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# The location of the pin, this should be the position of the toolhead when the cutter
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# just lightly touches the pin
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variable_pin_loc_x: 13
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variable_pin_loc_y: 56
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# The starting and end positions when making the cut
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# In particular, instead of making the cut by traveling to the pin location above,
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# we leave a small safety margin along X-axis to avoid scratching on the pin when traveling
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# This should also give a small distance to produce some momentum when pressing on the pin
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variable_pin_park_x_dist: 5.0
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# Position of the toolhead when the cutter is fully compressed
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# Should leave a small headroom to avoid banging the toolhead or gantry
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variable_pin_loc_x_compressed: 0
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# Speed related settings
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# Note that if the cut speed is too fast, the steppers can lose steps
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# Therefore, for a cut:
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# - We first make a fast move to accumulate some momentum and get the cut blade to the initial contact with the filament
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# - We then make a slow move for the actual cut to happen
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variable_travel_spd: 8000
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variable_cut_fast_move_spd: 2000
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variable_cut_slow_move_spd: 400
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variable_evacuate_speed: 8000
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variable_cut_dwell_time: 200 # time to dwell at the cut point in ms
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variable_cut_fast_move_fraction: 0.5 # fraction of the move that uses fast move
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# Safety margin for fast vs slow travel
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# When traveling to the pin location, we make a safer but longer move if we closer to the pin than this specified margin
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# Usually setting these to the size of the toolhead (plus a small margin) should be good enough
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variable_safe_margin_x: 30
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variable_safe_margin_y: 30
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#this is the length of filament to move after filament has been cut, just need enough to move it away from the cutting slot.
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variable_cut_retract_length: 2
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# Whether to eject the filament at the end
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variable_final_eject: 0
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gcode:
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{% set RETRACT_LENGTH = params.RETRACT_LENGTH | default(printer['gcode_macro CUT_FILAMENT']['retract_length']) | float %}
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{% set FINAL_EJECT = params.FINAL_EJECT | default(printer['gcode_macro CUT_FILAMENT']['final_eject'], True) | int %}
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{% set current_loc_x = printer.gcode_move.gcode_position.x %}
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{% set current_loc_y = printer.gcode_move.gcode_position.y %}
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SAVE_GCODE_STATE NAME=cut_filament_state
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{% if ("x" not in printer.toolhead.homed_axes) or ("y" not in printer.toolhead.homed_axes) %}
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G28 X Y
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{% endif %}
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{% set prev_pa = printer.extruder.pressure_advance %}
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SET_PRESSURE_ADVANCE ADVANCE=0 # temporaily disable PA
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{% set pin_park_x_loc = pin_loc_x + pin_park_x_dist %}
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{% set pin_park_y_loc = pin_loc_y %}
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{% set _extruder_moved_dist = 0 %}
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M83 # relative extrusion
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{% if RETRACT_LENGTH > 0 %}
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G1 E-{RETRACT_LENGTH} F3000 # retract to save filament waste
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{% set _extruder_moved_dist = _extruder_moved_dist + RETRACT_LENGTH %}
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{% endif %}
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G90 # absolute positioning
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_MOVE_TO_CUTTER_PIN PIN_PARK_X_LOC={pin_park_x_loc} PIN_PARK_Y_LOC={pin_park_y_loc}
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# Make the main cut
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_DO_CUT_MOTION PIN_PARK_X_LOC={pin_park_x_loc}
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G1 E-{cut_retract_length} F3000 #moves filament after cut, but not past the toolhead sensor
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M400
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M117 Filament cut!
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RESTORE_GCODE_STATE NAME=cut_filament_state MOVE=1 MOVE_SPEED={travel_spd}
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[gcode_macro _MOVE_TO_CUTTER_PIN]
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description: helper to move the toolhead to the target pin in either safe or faster way, depending on toolhead clearance.
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gcode:
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{% set safe_margin_x = printer['gcode_macro CUT_FILAMENT']['safe_margin_x'] | float %}
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{% set safe_margin_y = printer['gcode_macro CUT_FILAMENT']['safe_margin_y'] | float %}
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{% set travel_spd = printer['gcode_macro CUT_FILAMENT']['travel_spd'] | float %}
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{% set pin_park_x_loc = params.PIN_PARK_X_LOC | float %}
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{% set pin_park_y_loc = params.PIN_PARK_Y_LOC | float %}
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G90 # absolute positioning
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{% if ((printer.gcode_move.gcode_position.x - pin_park_x_loc) | abs < safe_margin_x) or ((printer.gcode_move.gcode_position.y - pin_park_y_loc | float) | abs < safe_margin_y) %}
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# Make a safe but slower travel move
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G1 X{pin_park_x_loc} F{travel_spd}
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G1 Y{pin_park_y_loc} F{travel_spd}
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{% else %}
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G1 X{pin_park_x_loc} Y{pin_park_y_loc} F{travel_spd}
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{% endif %}
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[gcode_macro _DO_CUT_MOTION]
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description: helper to do a single horizontal cut movement
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gcode:
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{% set pin_loc_x_compressed = printer['gcode_macro CUT_FILAMENT']['pin_loc_x_compressed'] | float %}
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{% set cut_fast_move_fraction = printer['gcode_macro CUT_FILAMENT']['cut_fast_move_fraction'] | float %}
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{% set cut_fast_move_spd = printer['gcode_macro CUT_FILAMENT']['cut_fast_move_spd'] | float %}
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{% set cut_slow_move_spd = printer['gcode_macro CUT_FILAMENT']['cut_slow_move_spd'] | float %}
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{% set cut_dwell_time = printer['gcode_macro CUT_FILAMENT']['cut_dwell_time'] | float %}
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{% set evacuate_speed = printer['gcode_macro CUT_FILAMENT']['evacuate_speed'] | float %}
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{% set pin_park_x_loc = params.PIN_PARK_X_LOC | float %}
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{% set fast_slow_transition_loc = (pin_loc_x_compressed - pin_park_x_loc) * cut_fast_move_fraction + pin_park_x_loc | float %}
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G1 X{fast_slow_transition_loc} F{cut_fast_move_spd} # make a fast move to initiate contact of the blade with the filament
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G1 X{pin_loc_x_compressed} F{cut_slow_move_spd} # do the cut in slow move
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G4 P{cut_dwell_time}
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G1 X{pin_park_x_loc} F{evacuate_speed} # evacuate
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[gcode_macro _MMU_FORM_TIP_STANDALONE]
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gcode:
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CUT_FILAMENT {rawparams}
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