Macro, add flow multiplier calibration (Frix_x)
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# __ ______ ___ ____ _____
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# \ \ / / ___/ _ \| _ \| ____|
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# \ \ / / | | | | | |_) | _|
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# \ V /| |__| |_| | _ <| |___
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# \_/ \____\___/|_| \_\_____| 3.1
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# Standalone 300 Setup.
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#
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#########################################
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###### FLOW MULTIPLIER CALIBRATION ######
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#########################################
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# Written by Frix_x#0161 #
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# https://github.com/Frix-x/klipper-voron-V2/blob/main/macros/calibration/calibrate_flow.cfg
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# @version: 1.5
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# CHANGELOG:
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# v1.5: moved the install notes into a proper markdown file in: doc > features > flow_calibration.md
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# v1.4: fix issue when extrude_factor is != 1
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# v1.3: fix the logging
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# v1.2: fix for those using absolute extrusion that leads to an error
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# v1.1: added part cooling fan control and some speed optimizations
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# v1.0: first flow calibration macro
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# -------------------------------------------------------------------------------------------------------------------------
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# If you want to use it into your own config, please install it as a standalone macro as described in the
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# installation section of this file: doc > features > flow_calibration.md
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# -------------------------------------------------------------------------------------------------------------------------
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### What is it ? ###
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# The main reason for this set of macros is to get a filament and slicer agnostic way to calibrate the flow extrusion multiplier.
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# The goal is to make it easy to set, share and use it.
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# This macro is parametric and most of the values can be adjusted with their respective input parameters.
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# It can be called without any parameters - in which case the default values would be used - or with any combination of parameters as desired.
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# Feel free to ping me on Discord (Frix_x#0161) if you need help or have any comments to improve it :)
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# ===========================================================================================================
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# DO NOT MODIFY THOSE VARIABLES (they are used internaly by the flow calibration macro)
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[gcode_macro FLOW_CALIB_VARIABLES]
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variable_last_shell_thickness: 0.0
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variable_last_evalue: 0.0
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gcode:
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[gcode_macro FLOW_MULTIPLIER_CALIBRATION]
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description: Print a small tower to calibrate the extrusion flow multiplier by measuring the shell
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gcode:
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#
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# PARAMETERS
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#
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# [ROKIN ADD TEMP]
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{% set EXTRUDER_TEMP = params.EXTRUDER_TEMP|default(printer[printer.toolhead.extruder].target, true)|float %}
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{% set BED_TEMP = params.BED_TEMP|default(printer.heater_bed.target, true)|float %}
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{% set do_raft = params.DO_RAFT|default(0)|int %} # whether to print a raft or not
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{% set do_retract = params.DO_RECTRACT|default(0)|int %} # whether to enable retract/unrectract on travel moves
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{% set print_size = params.PRINT_SIZE|default(40)|int %} # size of the printed object on the build plate
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{% set print_height = params.HEIGHT|default(6)|int %} # height of the printed object
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{% set corner_radius = params.CORNER_RADIUS|default(8)|int %} # radius of the corners to smooth the shell and toolpath
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{% set number_of_perimeters = params.PERIMETERS|default(4)|int %} # number of perimeters to print the shell
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{% set fan_speed = params.FAN_SPEED|default(40)|int %} # part cooling fan speed in percent (0-100)
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{% set e_multiplier = params.EXTRUSION_MULTIPLIER|default(1.00)|float %} # extrusion multiplier for the shell
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{% set filament_diameter = params.FILAMENT_DIAMETER|default(1.75)|float %} # filament diameter
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{% set extrusion_width = params.EXTRUSION_WIDTH|default(0.4)|float %} # extrusion width goal for one line
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{% set layer_height = params.LAYER_HEIGHT|default(0.24)|float %} # layer height for the print
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{% set retract_length = params.RETRACT_LENGTH|default(0.8)|float %} # how much to retract when traveling between print moves
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{% set initial_purge = params.PURGE_MM|default(8)|int %} # mm of filament to purge before printing. set to 0 to disable
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{% set z_hop_height = 2 * layer_height %}
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{% set feedrate_print = params.CONTROL_SPEED|default(100)|int * 60 %} # print feedrate
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{% set feedrate_travel = params.TRAVEL_SPEED|default(200)|int * 60 %} # travel feedrate between print moves
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{% set feedrate_raft = params.RAFT_SPEED|default(60)|int * 60 %} # print feedrate for printing raft
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{% set feedrate_z = params.Z_LIFT_SPEED|default(20)|int * 60 %} # z axis travel feedrate
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{% set feedrate_retract = params.RETRACT_SPEED|default(50)|int * 60 %} # retract and deretract feedrate
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#
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# COMPUTED VALUES
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#
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{% set e_per_mm = ((extrusion_width - layer_height) * layer_height + 3.14159 * (layer_height / 2)**2) / (3.14159 * (filament_diameter / 2)**2) %} # computed E factor (similar to Slic3r/PrusaSlicer/SuperSlicer)
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{% set spacing = extrusion_width - layer_height * (1 - 3.14159 / 4) %} # line spacing during the print
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{% set shell_thickness = extrusion_width + (number_of_perimeters|float - 1) * spacing %} # theoric shell thickness
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{% set max_x = printer.toolhead.axis_maximum.x|float %}
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{% set max_y = printer.toolhead.axis_maximum.y|float %}
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{% set x_start = max_x / 2 - print_size / 2 %}
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{% set y_start = max_y / 2 - print_size / 2 %}
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{% set x_end = x_start + print_size %}
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{% set y_end = y_start + print_size %}
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{% set num_raft_lines = ([print_size, max_x]|min / spacing)|round(0, 'floor')|int %}
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{% set raft_size = num_raft_lines * spacing %}
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#
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# STARTING...
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#
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{action_respond_info("")}
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{action_respond_info("Starting extrusion flow calibration print")}
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{action_respond_info("This operation can not be interrupted by normal means. Hit the \"emergency stop\" button to stop it if needed")}
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{action_respond_info("")}
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{action_respond_info("Exrusion multiplier used: %.4f" % e_multiplier)}
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{action_respond_info("Number of perimeters to print: %d" % number_of_perimeters)}
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{action_respond_info("THEORIC SHELL THICKNESS: %.4f" % shell_thickness)}
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{action_respond_info("")}
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{action_respond_info("Measure the shell thickness using a caliper or micrometer. Then call the computation macro with the measured value:")}
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{action_respond_info("COMPUTE_FLOW_MULTIPLIER MEASURED_THICKNESS=xxx.xxx")}
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{action_respond_info("")}
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SAVE_GCODE_STATE NAME=STATE_FLOW_MULTIPLIER_CALIBRATION
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#
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# set variables for later computation
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#
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SET_GCODE_VARIABLE MACRO=_FLOW_CALIB_VARIABLES VARIABLE=last_shell_thickness VALUE={shell_thickness}
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SET_GCODE_VARIABLE MACRO=_FLOW_CALIB_VARIABLES VARIABLE=last_evalue VALUE={e_multiplier}
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# [ROKIN ADD START]
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START_PRINT EXTRUDER_TEMP={EXTRUDER_TEMP} BED_TEMP={BED_TEMP}
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#
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# purging before raft
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#
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G90
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M83
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G92 E0.0
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G0 X{x_start} Y{y_start - 5} Z{layer_height} F{feedrate_travel} # move at the start position to do a purge line
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G91 # use relative coordinates for the prime line
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G1 E{initial_purge} F{5 * 60}
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G1 X{raft_size} E{raft_size * e_per_mm * 1.5} F{feedrate_raft / 2} # print prime line
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G1 Y-{extrusion_width} E{extrusion_width * e_per_mm} F{feedrate_raft / 2} # move to next line
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G1 X-{raft_size} E{raft_size * e_per_mm} F{feedrate_raft / 2} # print second prime line
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G1 E-{retract_length} F{feedrate_retract} # retract
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G0 Z{z_hop_height} F{feedrate_z} # z-hop
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G90 # back to absolute coordinates
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G0 X{x_start} Y{y_start} F{feedrate_travel} # move to start position
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G1 Z{layer_height} F{feedrate_z} # move to print height
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G1 E{retract_length} F{feedrate_retract} # unretract
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# set extrude_factor
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M221 S{e_multiplier * 100}
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#
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# print the raft
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#
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{% if do_raft == 1 %}
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G91 # use relative coordinates for the raft
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{% for curr_raft_line in range(1, num_raft_lines + 2) %}
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# print a raft line with alternating direction
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G1 Y{loop.cycle(1.0, -1.0) * raft_size} E{raft_size * e_per_mm} F{feedrate_raft}
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# spacing move
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{% if not loop.last %}
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G1 X{spacing} E{spacing * e_per_mm} F{feedrate_raft}
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{% endif %}
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{% endfor %}
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G1 E-{retract_length} F{feedrate_retract} # retract
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G0 Z{z_hop_height} F{feedrate_z} # z-hop
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G90 # back to absolute coordinates
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{% endif %}
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#
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# print the shell
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#
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G90
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M106 S{fan_speed * 255 / 100}
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# for each layer
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{% for curr_layer in range(1, (print_height / layer_height)|round|int) %}
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G0 X{x_start + corner_radius} Y{y_start} F{feedrate_travel} # move to XY start position
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G1 Z{(curr_layer * layer_height) + (layer_height if do_raft == 1 else 0)} F{feedrate_z} # move to Z start position
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# print one layer of the shell (in a for loop to do all the perimeters of one layer)
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{% for perim_num in range(number_of_perimeters) %}
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# compute values for the current perimeter (offset and radius)
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{% set perim_offset = perim_num * spacing %}
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{% set perim_radius = corner_radius - (perim_num * spacing) %}
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# start position of the current perimeter
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G1 X{x_start + corner_radius} Y{y_start + perim_offset} F{feedrate_travel}
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{% if do_retract == 1 %}
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G1 E{retract_length} F{feedrate_retract} # unretract
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{% endif %}
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# print the perimeter using the offset and radius computed
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G1 X{x_end - corner_radius} Y{y_start + perim_offset} E{(print_size - (2 * corner_radius)) * e_per_mm} F{feedrate_print}
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G3 X{x_end - perim_offset} Y{y_start + corner_radius} J{perim_radius} E{(3.14159 / 2) * perim_radius * e_per_mm} F{feedrate_print}
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G1 X{x_end - perim_offset} Y{y_end - corner_radius} E{(print_size - (2 * corner_radius)) * e_per_mm} F{feedrate_print}
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G3 X{x_end - corner_radius} Y{y_end - perim_offset} I-{perim_radius} E{(3.14159 / 2) * perim_radius * e_per_mm} F{feedrate_print}
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G1 X{x_start + corner_radius} Y{y_end - perim_offset} E{(print_size - (2 * corner_radius)) * e_per_mm} F{feedrate_print}
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G3 X{x_start + perim_offset} Y{y_end - corner_radius} J-{perim_radius} E{(3.14159 / 2) * perim_radius * e_per_mm} F{feedrate_print}
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G1 X{x_start + perim_offset} Y{y_start + corner_radius} E{(print_size - (2 * corner_radius)) * e_per_mm} F{feedrate_print}
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G3 X{x_start + corner_radius} Y{y_start + perim_offset} I{perim_radius} E{(3.14159 / 2) * perim_radius * e_per_mm} F{feedrate_print}
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{% if do_retract == 1 %}
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G1 E-{retract_length} F{feedrate_retract} # retract
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{% endif %}
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{% endfor %}
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{% if do_retract == 1 %}
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G91
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G0 Z{z_hop_height} F{feedrate_z}
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G90
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{% endif %}
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{% endfor %}
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#
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# retract and move away
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#
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G1 E-{retract_length} F{feedrate_retract}
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G91
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G0 Z20 F{feedrate_travel}
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# [ROKIN ADD END]
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END_PRINT
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RESTORE_GCODE_STATE NAME=STATE_FLOW_MULTIPLIER_CALIBRATION
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[gcode_macro COMPUTE_FLOW_MULTIPLIER]
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description: Compute a new flow multiplier by using the measured shell thickness on the calibration print
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gcode:
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{% set evalue = params.OLD_EXTRUSION_MULTIPLIER|default(0.0)|float %} # extrusion multiplier used for the calibration print
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{% set theorical_thickness = params.THEORICAL_THICKNESS|default(0.0)|float %} # theorical shell thickness
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{% set measured_thickness = params.MEASURED_THICKNESS|default(0.0)|float %} # measured shell thickness on the calibration print
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# if there is no OLD_EXTRUSION_MULTIPLIER passed as param, get the one from the last print calib run
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{% if evalue == 0.0 %}
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{% set last_evalue = printer["gcode_macro _FLOW_CALIB_VARIABLES"].last_evalue %}
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# then, if there is also no evalue saved from the last run, alert user
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{% if last_evalue == 0.0 %}
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{action_respond_info("It seems that no calibration print was run prior to this (or a restart of Klipper occured).")}
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{action_respond_info("You can still manually use it by calling again this macro like that:")}
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{action_respond_info("COMPUTE_FLOW_MULTIPLIER OLD_EXTRUSION_MULTIPLIER=xxx.xxx THEORICAL_THICKNESS=xxx.xxx MEASURED_THICKNESS=xxx.xxx")}
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{action_raise_error("not enough data to perform the computation of the new flow !")}
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{% else %}
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{% set final_evalue = last_evalue %}
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{action_respond_info("Using OLD_EXTRUSION_MULTIPLIER: %.3f" % final_evalue)}
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{% endif %}
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{% else %}
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{% set final_evalue = evalue %}
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{action_respond_info("Using OLD_EXTRUSION_MULTIPLIER: %.3f" % final_evalue)}
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{% endif %}
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# similarly, if there is no THEORICAL_THICKNESS passed as param, get the one from the last print calib run
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{% if theorical_thickness == 0.0 %}
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{% set last_shell_thickness = printer["gcode_macro _FLOW_CALIB_VARIABLES"].last_shell_thickness %}
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# then, if there is also no evalue saved from the last run, alert user
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{% if last_shell_thickness == 0.0 %}
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{action_respond_info("It seems that no calibration print was run prior to this (or a restart of Klipper occured).")}
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{action_respond_info("You can still manually use it by calling again this macro like that:")}
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{action_respond_info("COMPUTE_FLOW_MULTIPLIER OLD_EXTRUSION_MULTIPLIER=xxx.xxx THEORICAL_THICKNESS=xxx.xxx MEASURED_THICKNESS=xxx.xxx")}
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{action_raise_error("not enough data to perform the computation of the new flow !")}
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{% else %}
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{% set final_theorical_thickness = last_shell_thickness %}
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{action_respond_info("Using THEORICAL_THICKNESS: %.3f" % final_theorical_thickness)}
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{% endif %}
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{% else %}
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{% set final_theorical_thickness = theorical_thickness %}
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{action_respond_info("Using THEORICAL_THICKNESS: %.3f" % final_theorical_thickness)}
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{% endif %}
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# use the measured thickness from the user to compute a new flow value
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{% if measured_thickness == 0.0 %}
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{action_respond_info("You must use a caliper or micrometer to measure the calibration print shell thickness and call this macro with the measured value !!!")}
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{action_respond_info("COMPUTE_FLOW_MULTIPLIER MEASURED_THICKNESS=xxx.xxx")}
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{action_raise_error("not enough data to perform the computation of the new flow !")}
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{% else %}
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{% set new_evalue = final_theorical_thickness * final_evalue / measured_thickness %}
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{action_respond_info("NEW COMPUTED FLOW VALUE: %.3f" % new_evalue)}
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{action_respond_info("Use this new value as extrusion multiplier in your slicer of choice")}
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{action_respond_info("")}
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{% endif %}
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@ -25,3 +25,8 @@ enable_force_move: True
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# https://www.klipper3d.org/Exclude_Object.html
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# https://www.klipper3d.org/Exclude_Object.html
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[exclude_object]
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[exclude_object]
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# For flow_calibration macro
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# https://github.com/Frix-x/klipper-voron-V2/blob/main/doc/features/flow_calibration.md
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[gcode_arcs]
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resolution: 0.2
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