The (Original) 1Hz Challenge

There's not much mystery to the pendulum's design.
To keep the pendulum's performance harmonic 2⁰-4⁰ of displacement is typical. And a 1m pendulum length yields 2 π sqrt(L/g) ≈ 2s period.

My first armature was an abject failure because the impulse faces (7mm) were too big.

The second armature print worked. After a some axle spacing adjustment, it completed 60 tick tocks in  a minute-ish. I wasn't measuring, really just happy it continued tick-tocking.

Parts were designed in OpenSCAD, exported as STL and sliced using FlashForge's FlashPrint software using the "fine" settings (except for the pendulum mount for which precision wasn't important).

Parts were printed on a FlashForge Creator Pro (years old now).

The first armature had 7mm impulse faces which were way too wide.