WatchTech - A David Walter Double Pendulum Clock – Part 18, First Synchonisation !

A David Walter Double Pendulum Clock – Part 18, First Synchonisation !

Jan 05, 2016,23:22 PM

The clock is up and running!

David's commentary:
The sidereal movement made its first tick at 12.17pm today,

once I was happy with it's running I fitted the other movement and weight. Dual "Tick" was achieved at 3.37pm on the 30th December 2105.

The following MicroSet graph shows both pendulums from a start without interruption by me doing something else to the clock. The clock is mounted on a test wall and is not enclosed by a case, even walking past will create a draft and effect the pendulums rate and amplitude. The timer is set to record every 60 seconds. Beginning at the far left the pendulums initial rate (the vertical red lines) is is very high and low, this is reflected in the amplitude (light blue line), very quickly the pendulums become locked in Anti-phase or as is sometimes said "achieves resonance". In this instance I was able to start the pendulums very close to anti-phase.
If anyone is interested I can record and post another graph showing a start with greater deviation from anti-phase. As is clear on the MicroSet graph both pendulums come to their rate within about 30 minutes and stayed consistent over the 12 hours shown. The pendulums have not been brought to rate yet as this is the very first run and a 2.8 seconds per day error is a very good start. The amplitude (light blue line) shows that it take some 5-6 hours for the pendulum amplitude to stabilize.

For those of you who didn't see the earlier installments of this series, you can catch up by looking here:
    - Installment 1 – Introduction and Cutting out the plates
    - Installment 2 – Making the Barrel
    - Installment 3 – The Suspension
    - Installment 4 – Invar Pendulum Parts
    - Installment 5 – Making the Wheels
    - Installment 6 – Completing the Barrels, Cutting some Pinions
    - Installment 7 – The Escape Wheels
    - Installment 8 – The Mean/Solar Movement Main Train
    - Installment 9 – The Equation Wheel
    - Installment 10 - The Equation Movement is Finished
    - Installment 11 - Making a Cock
    - Installment 12 - The Support Plates
    - Installment 13 - Perpetual and more
    - Installment 14 - The Planisphere
- Installment 15 - The Sidereal Train
    - Installment 16 - The Case
    - Installment 17 - The First Tick

Comments: view entire thread

I need to visit this section more often.

By: BDLJ : January 17th, 2016-04:13

This is fantastic. Will have to do some thinking. Thanks for sharing, Don.