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Clockmaking · Interactive explainer
Pendulum clock regulation explorer
Turn measured gain or loss into daily rate error, required pendulum length change, approximate bob movement, rating-nut turns, and temperature drift by rod material.
What this page answers
Pendulum-clock advice often stops at “raise the bob if it is slow, lower it if it is fast” and then leaves out the only practical question: by how much. This page converts an observed rate error into a concrete adjustment.
- Turns a multi-day timing check into seconds per day.
- Estimates the effective-length change required to correct the rate.
- Translates that into approximate bob movement and rating-nut turns.
- Shows how temperature drift changes with steel, brass, wood, or Invar rods.