Pressure Advance Calibration Pattern

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:
Filament:
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 M190 S110 ; <-- SET BED TEMPERATURE HERE - Wait to heat bed M109 S240 ; <-- SET NOZZLE TEMPERATURE HERE - Wait to heat extruder for homing accuracy G28 ; Home all axis G32 ; Home all axis, tram gantry G90 ; Use absolute positioning G1 Z5 F100 ; Move to safe Z BED_MESH_CALIBRATE ; Create mesh PRINT_START ; PRINT_START EXTRUDER=240 BED=110 ; If using parameter-ized PRINT_START Copy the start G-code from your slicer and set the appropriate parameters. Be sure to check over the entire Start G-code every time before generating.
End G-code:	PRINT_END Copy the end G-code from your slicer and set any appropriate parameters.
Retraction Distance:		Retraction distance (mm)
Layer Height:		Layer Height (mm)
Fan Speed:		Fan Speed (%)
Print Bed:
Bed Size X:		Size (mm) of the bed in X
Bed Size Y:		Size (mm) of the bed in Y
Speed:
Use mm/s:		Use mm/s instead of mm/min
Slow Printing Speed:		Use square_corner_velocity value
Fast Printing Speed:		Fast printing speed. This should differ noticeably from Slow Speed
Movement Speed:		Movement speed
Retract Speed:		Retract Speed of the extruder
Unretract Speed:		Unretract Speed of the extruder
Acceleration:		Set printing acceleration (mm/s^2)
Pattern:
Pattern Type:		Select standard or alternate pattern
Starting Value for PA:		Starting value for the Pressure Advance-factor
Ending Value for PA:		Ending value of the PA
PA Stepping:		Stepping of the Pressure Advance in the test pattern. Needs to be an exact divisor of the PA 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 K-value besides every second test line
Advanced:
Nozzle Line Ratio:		Ratio between extruded line width and 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 activated in Klipper
Extrusion Multiplier:		Usually around 0.92 for ABS
Prime Nozzle:		Prime the nozzle before starting the test pattern (Disable if your PRINT_START performs a prime already)
Prime Extrusion Multiplier:		The default of 2.5 results in roughly 1mm of filament for 10mm line length
Prime 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.
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.
The script checks to make sure the print fits on the bed. Verify it using a host software like Printrun or Repetier Host.
Start and End Value for the 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.