Equation clock using wheels not a cam to generate the curve

NigelW

Registered User
Jan 2, 2015
452
44
28
London and Kent
Country
It has always been my ambition to build an equation clock. As an excerise I designed the wheel work for one in Fusion360 which relies on a kidney cam but have decided that this is too simplistic. The fourier analysis of the equation curve show that summing two sine curves gets you close and adding a third gets you very close indeed. This technique will adjust the curve over time, which a cam won't do.

To this end I have just received delivery of the book on Jens Olsens clock which should keep me busy for a few weeks. It adds five sine curves to get the adjustment from mean to lunar time and three from mean to solar. What a clock!

Jens olsen.jpg equation work.jpg
 

Forum statistics

Threads
165,347
Messages
1,439,150
Members
86,162
Latest member
Evocatas
Encyclopedia Pages
1,101
Total wiki contributions
2,873
Last edit
Weekly News 7/7/19 by Tom McIntyre