Closed-loop motion · 16384-count encoder · from $250

Servo drives that hold ±0.009 mm — not just chase it.

A3DP builds closed-loop step/servo drive upgrades, curates engineering-grade filament, and publishes the tuning tools we run on our own machines. Free calculators, real measurements, no vendor theater.

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FIG.01 — N17 DRIVE, INTEGRATED ENCODER● IN STOCK

Featured hardware

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Free tools we actually use

Large-format printing
>_ flow

Flow Rate Calculator

Measure actual extrusion throughput and calibrate flow the way that survives a real print, not just a test line.

INPUT line width · layer height · measured length → OUTPUT flow %
>_ pa

Pressure Advance Calibrator v2

Auto-generates PA test gcode and reads the results for Klipper, Marlin, and Duet — tuned towers, no spreadsheet.

INPUT filament · speeds · PA range → OUTPUT PA value
>_ pick

Filament Picker

Answer 12 real-world questions — flexible, food-safe, outdoor, engineering — and get an honest material pick with store and budget options.

INPUT your use case → OUTPUT material + links

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The calculators, guides, and reviews are free and always will be. Patrons keep the test machines printing and the measurements coming.

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