A handwriting machine for the Bambu Lab A1 Mini.
Type a message — a real pen writes it in cursive.

Download for macOS View on GitHub

Completely open source · MIT licensed

A Bambu A1 Mini with the pen attachment, having just written 'Handwriter Buddy' in cursive ink on paper

How it works

1 · Write

Type your message. Single-stroke Hershey cursive, sized in real millimeters.

2 · Aim

Click the true-scale bed preview to place it. Add SVG drawings, move, scale, rotate.

3 · Plot

A pen on the printhead writes it — ink on paper, letter by letter.

Handwriter Buddy app: bed preview with cursive handwriting and plotter controls

Print the pen attachment

Six printable parts. Pick the adapter that fits your pen.

Cap closes the top of the tube 53 × 74 × 12 mm
Printed spring keeps gentle pressure on the pen 48 × 42 × 20 mm
Pen tube mounts on the toolhead 25 × 20 × 42 mm
Adapter S small pen bore — pick one 25 × 20 × 13 mm
Adapter M medium pen bore — pick one 25 × 20 × 24 mm
Adapter L large pen bore — pick one 25 × 20 × 53 mm
↓ Download all six parts — STEP, 11 MB
Setup in one breath: computer and printer on the same network, printer in LAN Only Mode with Developer Mode on — the app walks you through it with an illustrated guide. Never home the printer with the pen mounted.

Made by Ulf Schwekendiek — Co-Founder & CTO at Somo.ai. Come hack with me on cool projects.