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Discussion in 'Tower, Monumental & Street Clocks' started by le arsi, Apr 20, 2014.
What is wrong with this supposed to be a clock movement?
Where is the main spring.
It uses weights, see the cable going under the platform?
Weight driven see the spool with blue wire / cable on the top left.
I missed that, not awake yet, Le Arsi did you make this.
The weights are hooked up to the wrong wheel. the pulley should be on the bottom wheel, not the escape.
But then again, who knows, it just might work. Looks like a weekend project. Where did it come from.?
There's no grass around it...looks like "lawn art" to me.
Escapement wheel is not an escapement wheel. Verge has no proper impulse faces. Pendulum directly attached to verge arbor....................................................
I tried to focus in on that Shimmy, but couldn't determine that. How did you figure that out.... or are you just BSing us?
lol, no BSing, moi?!
I enlarged the pic. The EW is a normal toothed wheel, not an EW The verge is a strip of metal with the ends bent over
I don't think it is a clock movement! I think it is a clockwork rotisserie
No Kevin, a group of graduating students made this as part of their thesis project called solar tracker that is motor less. They found a clock diagram in the internet and commissioned a machine shop to build it for them. So everybody has no clockmaking background that's why they found me.
Back to the drawing board then...
When the project did not work as they expected they were forced to find a clockmaker and found me. After an agreement I started to work. First I discovered that 3 of the ball bearings were damaged that's why there is no free motion when I first test it.
I replaced them with new but decided to use the ID of all the ball bearings as bushings because the bearings has tight friction. So I reshaped all the pivots. Transfer the weight to the first wheel and I got the free wheeling motion of the gear train.
Made the replacement pallet and the pendulum.
Made the dial train to drive the solar panel but with teeth combinations calculated for the solar panel face to rotate at 6am to 6pm.
How is it regulated and how was its BPM calculated? I assume it has to be manually reset after each cycle?
Yes, the important according to them is to make the solar panel rotate in time with the sun. I calculated the wheel teeth and the pinion leaves and came up with 4320BPH that become my target freq using my Microset. From that freq I calculated also the length of the pendulum to be at aprox. 27 inches long.
Interesting project. How will you keep the wiring from getting twisted if the panel makes a 360 degree rotation every day? Might work better using a cam that resets the position daily.
Sharp eyes Harold! That's another thing, making a rotating slip contact or that cam you said.