Pressure Advance Calibrator v2 (Klipper, Marlin, Duet)

Pressure Advance Calibrator v2 — Klipper · Marlin · RepRapFirmware

One generator, three firmwares. Pick your firmware, print the pattern, read the result, set your value. Defaults are pre-set per firmware (Klipper/RRF in seconds, Marlin K on the LA 1.5 scale — never swap values between families).

Printer & filament
appears in the file header
appears in the file header
1.75 or 2.85
line width = ×1.2
tune at your normal temp
~0.3×–0.75× nozzle
PLA wants 100
0 = first extruder / M572 D drive
usually 1.0
direct 0.4–1, bowden 2–4; PA adds effective retract — err low
Bed
Round forces bed-center origin
on if your slicer outputs centered coordinates (most Klipper setups)
Marlin/RRF probe setups
Speeds & acceleration
the K effect lives between the two speeds
must clearly differ from slow
your normal print accel; Klipper default 3000, Marlin often 500
K range & pattern
Klipper/RRF: seconds · Marlin: LA 1.5 K
see preset for your setup
needs to divide the range
more spacing = bigger bed needed
whole layers per band
rotate to put X-moves on your X belt or vice versa
printed 7-segment digits (LCD label too)
anchors the start/end of the test lines; may improve adhesion
Marlin-style: shows accel-side and decel-side behavior on one line — also exposes extruder backlash
Advanced
purge + start clean
needs FWRETRACT in firmware
1.05–1.2
.gcode added automatically
Klipper gear we recommend
BIGTREETECH ADXL345 V2.0 Accelerometer
BIGTREETECH ADXL345 V2.0 Accelerometer
The accelerometer this calibrator's input-shaping workflow pairs with — USB, plug-in simple.
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$17.99 on Amazon
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BIGTREETECH SKR Mini E3 V3.0 Control Board
BIGTREETECH SKR Mini E3 V3.0 Control Board
Drop-in 32-bit board that runs Klipper on stock Ender-class printers.
$43.99 on Amazon
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Micro Swiss All Metal Hotend (Ender 3 / CR-10)
Micro Swiss All Metal Hotend (Ender 3 / CR-10)
All-metal hotend so PA values stay stable at real nozzle temps.
$63.50 on Amazon
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Want smoother motion than input shaping alone? See our Integrated Servo Drives — closed-loop steppers that hold torque where open-loop printers lose steps.

Tools for this guide

VINCA DCLA-0605 Digital Caliper (measure, don't guess), 0.01g Pocket Scale (with calibration weights) (for flow-rate weighing)

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