updates and fixes

ercf_additional.cfg

@@ -8,18 +8,18 @@ variable_retract_length: 35
 
 # The location of the pin, this should be the position of the toolhead when the cutter 
 # just lightly touches the pin
-variable_pin_loc_x: 20
+variable_pin_loc_x: 21
-variable_pin_loc_y: 21.0
+variable_pin_loc_y: 19
 
 # The starting and end positions when making the cut
 # In particular, instead of making the cut by traveling to the pin location above, 
 # we leave a small safety margin along X-axis to avoid scratching on the pin when traveling
 # This should also give a small distance to produce some momentum when pressing on the pin 
-variable_pin_park_x_dist: 5
+variable_pin_park_x_dist: 5.0
 
 # Position of the toolhead when the cutter is fully compressed
 # Should leave a small headroom to avoid banging the toolhead or gantry
-variable_pin_loc_x_compressed: 5
+variable_pin_loc_x_compressed: 5.0
 
 # Speed related settings
 # Note that if the cut speed is too fast, the steppers can lose steps
@@ -39,9 +39,12 @@ variable_cut_fast_move_fraction: 0.5 ; fraction of the move that uses fast move
 variable_safe_margin_x: 30
 variable_safe_margin_y: 30
 
-# Number of repeats for the cut
+# Whether or not to make a second cut
-# Better be one to avoid small debris due to different cutting positions for different tries 
+# The goal of the second cut is to avoid filament adding friction to the blade causing the lever unable to decompress
-variable_num_cut_repeats: 1
+# If set to a positive value, we first retract this amount, make the second cut, then extrude back
+# Set to 0 to disable to second cut
+# You should only enable this if you cannot get the lever to reliabily decompress.
+variable_second_cut_retract_length: 0
 
 # Whether to eject the filament at the end
 variable_final_eject: 0
@@ -61,7 +64,6 @@ variable_retracted_length_: 0 ; a state variable to keep track of how much we ha
 gcode:
     {% set RETRACT_LENGTH = params.RETRACT_LENGTH | default(printer['gcode_macro CUT_FILAMENT']['retract_length']) | float %}
     {% set FINAL_EJECT = params.FINAL_EJECT | default(printer['gcode_macro CUT_FILAMENT']['final_eject'], True) | int %}
-    {% set NUM_CUT_REPEATS = params.NUM_CUT_REPEATS | default(printer['gcode_macro CUT_FILAMENT']['num_cut_repeats']) | int%}
     {% set current_loc_x = printer.gcode_move.gcode_position.x %}
     {% set current_loc_y = printer.gcode_move.gcode_position.y %}
 
@@ -88,13 +90,14 @@ gcode:
     G90 ; absolute positioning
     _MOVE_TO_CUTTER_PIN PIN_PARK_X_LOC={pin_park_x_loc} PIN_PARK_Y_LOC={pin_park_y_loc}
 
-    {% set fast_slow_transition_loc = (pin_loc_x_compressed - pin_park_x_loc) * cut_fast_move_fraction + pin_park_x_loc | float %}
+    # Make the main cut 
-    {% for _ in range(NUM_CUT_REPEATS) %}
+    _DO_CUT_MOTION PIN_PARK_X_LOC={pin_park_x_loc}
-        G1 X{fast_slow_transition_loc} F{cut_fast_move_spd} ; make a fast move to initiate contact of the blade with the filament
+    # Optional secondary cut to help decompressing the lever
-        G1 X{pin_loc_x_compressed} F{cut_slow_move_spd} ; do the cut in slow move
+    {% if second_cut_retract_length > 0 %}
-        G4 P{cut_dwell_time}
+        G1 E-{second_cut_retract_length} F3000
-        G1 X{pin_park_x_loc} F{evacuate_speed} ; evacuate
+        _DO_CUT_MOTION PIN_PARK_X_LOC={pin_park_x_loc}
-    {% endfor %}
+        G1 E{second_cut_retract_length} F3000
+    {% endif %}
 
     {% if FINAL_EJECT == 1 %}
         G1 E-80 F3000
@@ -130,13 +133,29 @@ gcode:
         G1 X{pin_park_x_loc} Y{pin_park_y_loc} F{travel_spd}
     {% endif %}
 
+[gcode_macro _DO_CUT_MOTION]
+description: helper to do a single horizontal cut movement
+gcode:
+    {% set pin_loc_x_compressed = printer['gcode_macro CUT_FILAMENT']['pin_loc_x_compressed'] | float %}
+    {% set cut_fast_move_fraction = printer['gcode_macro CUT_FILAMENT']['cut_fast_move_fraction'] | float %}
+    {% set cut_fast_move_spd = printer['gcode_macro CUT_FILAMENT']['cut_fast_move_spd'] | float %}
+    {% set cut_slow_move_spd = printer['gcode_macro CUT_FILAMENT']['cut_slow_move_spd'] | float %}
+    {% set cut_dwell_time = printer['gcode_macro CUT_FILAMENT']['cut_dwell_time'] | float %}
+    {% set evacuate_speed = printer['gcode_macro CUT_FILAMENT']['evacuate_speed'] | float %}
+    {% set pin_park_x_loc = params.PIN_PARK_X_LOC | float %}
+    {% set fast_slow_transition_loc = (pin_loc_x_compressed - pin_park_x_loc) * cut_fast_move_fraction + pin_park_x_loc | float %}
+    G1 X{fast_slow_transition_loc} F{cut_fast_move_spd} ; make a fast move to initiate contact of the blade with the filament
+    G1 X{pin_loc_x_compressed} F{cut_slow_move_spd} ; do the cut in slow move
+    G4 P{cut_dwell_time}
+    G1 X{pin_park_x_loc} F{evacuate_speed} ; evacuate
+
 [gcode_macro restore_cutted_filament]
 description: extrudes an amount equal (or proportional) to the retraction during the last cut
 gcode:
     SAVE_GCODE_STATE NAME=restore_cutted_filament_state
     {% set RETRACTED_LENGTH = printer['gcode_macro CUT_FILAMENT']['retracted_length_'] | float %}
     M83 ; relative extrusion
-    G1 E{RETRACT_LENGTH} F3000
+    G1 E{RETRACTED_LENGTH} F3000
     SET_GCODE_VARIABLE macro=CUT_FILAMENT variable=retracted_length_ value=0 ; clear the retracted amount
     RESTORE_GCODE_STATE NAME=restore_cutted_filament_state
 
@@ -144,4 +163,3 @@ gcode:
 [gcode_macro _ERCF_FORM_TIP_STANDALONE]
 gcode:
     CUT_FILAMENT {rawparams}
-