Pressure Advance Calibration Pattern

!! This tool has been deprecated in favor of its replacement !!

Caution!
If Start G-code is incorrect, it could damage your printer. Anything which could damage your printer could cause other damage. Be absolutely sure your Start G-code is correct before printing the generated G-code.

Use this form to generate G-code that you can use to calibrate your pressure advance. Default values apply to standard ABS with a 0.4mm nozzle.

Press the Generate G-code button followed by Download as file to save the result.

Settings	G-code
Printer:
Printer Name		Optional. Puts printer name in a comment in the g-code
Filament		Optional. Puts filament name in a comment in the g-code
Filament Diameter		Diameter of the used filament (mm)
Nozzle Diameter		Diameter of the nozzle (mm)
Start G-code	M112 ; Refer to https://bit.ly/3q1dChR G28 ; Home all axes G90 ; Use absolute positioning G1 Z10 F100 ; Z raise M190 S110 ; <-- !!! SET BED TEMPERATURE HERE !!! - Wait to heat bed M109 S240 ; <-- !!! SET NOZZLE TEMPERATURE HERE !!! - Wait to heat extruder G28 Z ; Home z with hot nozzle (for accuracy w/ nozzle endstops) G32 ; Home all axes, tram gantry ; BED_MESH_CALIBRATE ; Create mesh PRINT_START ; PRINT_START HOTEND=240 BED=110 ; If using parameter-ized PRINT_START Copy your normal start G-code from your slicer and set the appropriate parameters. Be sure to check over the entire start G-code before generating.
End G-code	PRINT_END Copy your normal end G-code from your slicer and set any appropriate parameters.
Retraction Distance		Retraction distance (mm)
Layer Height		Layer Height (mm)
Extruder Name		Extruder Name for printers with multiple extruders. Usually just called "extruder" for standard printers

Fan Speed		Fan Speed (%)
Print Bed:
Bed Shape		Rectangular or round bed. Round beds will activate Origin Bed Center
Bed Size X		Size (mm) of the bed in X
Bed Size Y		Size (mm) of the bed in Y
Origin Bed Center		Set the origin position (X0 Y0) to bed center instead of front-left corner
Speed
Use mm/s		Use mm/s instead of mm/min
Slow Printing Speed		Use your square_corner_velocity value from your printer.cfg (to simulate a 90 degree corner)
Fast Printing Speed		Use your fastest perimeter speed (internal/external). This should differ noticeably from Slow Speed or results may be hard to read
Travel Speed		Travel speed
Retract Speed		Retract Speed of the extruder
Unretract Speed		Unretract Speed of the extruder
Acceleration		Set printing acceleration (mm/s²)
Pattern:
Pattern Type		Select standard or alternate pattern
Starting Value for PA		Starting value for pressure advance
Ending Value for PA		Ending value of pressure advance
PA Stepping		Stepping of the pressure advance value in the test pattern. Needs to be an exact divisor of the pressure advance range (End - Start)
Slow Speed Length		Length of the Slow Speed test-line (mm)
Fast Speed Length		Length of the Fast Speed test-line (mm)
Test Line Spacing		Distance between the test lines. This will impact print size
Print Anchor Frame		Adds a frame around the start and end points of the test lines. May improve adhesion
Printing Direction		Rotates the print in 45° steps
Line Numbering		Prints the pressure advance value beside every second test line
Advanced:
Line Width Ratio		Line width as a ratio of nozzle diameter. Should be between 1.05 and 1.2
Z-Offset		Offset the Z-axis for manual Layer adjustment
Use FW Retract		Use Firmware Retract. Needs to be set up in Klipper
Extrusion Multiplier		Usually around 0.94 for ABS
Prime Line		Print a prime line before starting the test pattern (Disable if your start G-code performs a prime line already)
Prime Line Extrusion Multiplier		The default of 2.5 results in roughly 1mm of filament for 10mm line length
Prime Line Printing Speed		Speed of the prime move
Dwell Time		Inserts a pause of x seconds before starting the test pattern to bleed off any residual nozzle pressure
Filename	warning warning warning

Notes on the settings:

Prime Nozzle should only be enabled if your PRINT_START macro does not prime the nozzle already.
Fast Printing Speed and Slow Printing Speed should be significantly different or the pressure advance effect will barely be visible.
For round beds the option Origin Bed Center is automatically activated.
The overall width (X-direction) of the print depends on the Fast Speed Length and Slow Speed Length settings plus 5mm for the priming line. The length (Y-direction) depends on the pressure advance settings and Line Spacing.
Start and End Value for pressure advance determines the range that the test pattern will cover. For example a Start Value of 50 and an End Value of 150 will test a range of 100.
The Pressure Advance Stepping determines how many test lines are printed for the above range. For example, a Stepping of 10 and a range of 100 results in 10 test lines. A stepping of 3 would not work in this example as 100 cannot be exactly divided by 3. The script will throw an error message if an exact division is not possible. In this case either the range or the stepping needs to be adjusted.
The Alternate Pattern has a second line of Fast Printing Speed to test 0 to Fast Printing Speed and back to 0 conditions. Best used with an increased Test Line Spacing and reduced pressure advance range.
The proper Pressure Advance depends on the filament, nozzle size, nozzle geometry and printing temperature. If any of these values change, the calibration might need to be repeated.