Create a fully customizable text-engraved slinky-style toy. Personalize height, diameter, text, fonts, spacing, colors… — then print it in one piece and release the spring after printing.

How It Works

This model prints as a solid spiral cylinder.
Once printed, you open the first gap with a blade and then the coils peel apart easily by hand — turning it into a spring-like slinky.

Very important:
This design depends on precise filament calibration. Clean separation between coils requires accurate extrusion.
I have achieved excellent results with Bambu Lab Matte PLA using default profiles, which provide great dimensional consistency and crisp text.

Try the included test piece first.
A small coil test slice is generated automatically — print it before the full slinky to confirm your flow settings and separation tolerance. This saves time and filament.

No supports. No assembly. Just print, open, and play.

How to Customize

1. Click Customize
2. Edit text (use * for line breaks), sizing, spacing, colors, and geometry
3. Download 3MF (recommended for dual-color text inlay) or STL
4. Slice & print upright — no supports
5. Use a blade to start the first separation, then peel coils apart by hand

Parameter Descriptions

Text controls

• slinkyText — The text that wraps around the slinky. Use * to create line breaks (e.g., Hello*World).
• textFont — Choose the font for the engraving.
• fontSize — Height of the letters in mm.
• textEngraveDepth — Depth of the engraved text.
• textLetterSpacingFactor — Multiplies spacing between letters.

Colors

• slinkyColor — Color of the spiral body.
• textColor — Color for the text inlay.

Dimensions

• totalHeight — Overall height of the printed toy.
• outerDiameter — Overall diameter of the cylinder.

Spring geometry

• ringThickness — Thickness of each coil band.
• layerHeight — Vertical height per coil layer.
• clearance — Gap between coils; increase if separation is too tight.

Printing Instructions

• Print upright, as provided
• Do not use supports
• Use a skirt or light brim if your first-layer adhesion is weak

Releasing the spring

1. Insert a knife / hobby blade between the first two coils
2. Twist gently to pop the first gap open
3. Once the first coil is free, the rest separate effortlessly with your fingers