Virtual Pivot Point Straight Morse Key

A VPP straight Morse key - the knob follows the native trajectory of the wrist.

Concept Demo: 

Build video:

https://youtu.be/miGSeoow_kU

Printed parts

STLs are in print orientation, except the tower: the STL stands on its tongues, the 3mf prints it roof-down.

• base ×1

• tower ×1

• arm ×1

• tail ×1

• knob ×1

• link ×3

• carrier (magnet thumbscrew) ×1

• ring ×2 (the 3mf prints 4: two spares)

Hardware

Shopping list: https://a.co/0eKKzGF6

• M3 socket cap screws: M3 × 12 ×6, M3 × 14 ×1, M3 × 18 ×2 (one kit covers all three): https://www.amazon.com/dp/B083SGJ7BD

• M3 nylon-insert lock nut, 5.5 AF × 4 ×9: https://www.amazon.com/dp/B0CPJF21KP

• M3 flat washer, 3 × 5 × 0.2 mm ×8 (both faces of each upper-link bearing): https://www.amazon.com/dp/B0DP6ZB4DD

• 693ZZ ball bearing ABEC-7, 3 × 8 × 4, shielded ×6: https://www.amazon.com/dp/B0D3VCBPVV

• 8 × 3 mm disc magnet, N35+ ×6: https://www.amazon.com/dp/B0GVRX49XG

• Brass-plated paper fastener, 10 mm round head, 1 in shank ×1 (a clipping from its leg is the moving contact): https://www.amazon.com/dp/B004G541YG

• 3.5 mm TRS panel jack, vertical 3-pin, threaded collar ×1: https://www.amazon.com/dp/B0FQ311GYM

• 28–30 AWG stranded hook-up wire, 150 mm: https://www.amazon.com/dp/B07G2SWB19

• Thin CA glue

• Electrical tape (a 5 × 5 mm square for the rest stop) and heat-shrink for the jack's leads

Licence

Design by K0TX. CC BY-NC-SA 4.0: share, print and remix with credit to K0TX and a link here; say what you changed and share your version under the same terms; no selling of files, prints or kits.