CW-Iambic-paddle

CW Iambic Paddle (3D Printed)

This is a mostly 3D printed CW iambic paddle that works well for everyday use. It’s not a high-end metal key, but it performs reliably and is a solid option if you want something simple, affordable, and easy to build.

The design uses printed paddles with a compact base, along with a few pieces of hardware for contacts and return tension.

Features

• Dual-lever (iambic) input

• Mostly 3D printed design

• Simple and compact

• Works well once adjusted

Bill of Materials (BOM)

Printed Parts

• All STL files included in this model

Hardware

Springs & Spacers

• (2×) Idler Springs
  https://www.prusa3d.com/product/idler-spring/

• (1×) Heatbed Spacer
  https://www.prusa3d.com/product/heatbed-spacer/

Magnets

• (2×) Magnets
  https://www.prusa3d.com/product/set-of-magnets/

Fasteners

• (3×) M3x20 screws

• (2–4×) M3x10 screws

• (2–4×) M3 nuts

Electrical

• Wire for connection to keyer

Hardware Needed (Functionally)

• (2) M3 screws (contacts)

• (2) M3 bolts + nuts (pivots)

• (2) Small magnets (return tension)

• Wire for connection

Print Settings

• Layer height: 0.2 mm

• Infill: 10–15%

• Walls: 3 perimeters

• Material: PLA or PETG

• Supports: Yes (easy to remove)

Notes

• Not 100% printed — screws, magnets, springs, and wiring are required

• Takes tuning to dial in spacing and feel

• Occasional bounce/double-tap is possible if poorly adjusted

• Adding weight to the base improves stability

Use

• General CW operation

• Practice and learning

• Portable setups