Hello Steve,
I'm now on my fourth build of your impressive clocks All running fine,
However, I have just completed two of the Dead Beat Coup Clocks.
But I find that to get them to keep accurate time I have to set the pendulum very low.
But on one of the clocks, with the pendulum at the lowest point it still runs fast, therefore I cant slow it down any further
.
Do I need to extend the pendulum arm?
Any suggestion for a solution would be most appreciated.
Many thanks
Alan
That is strange that only one of the clocks runs out of adjustment range. How much too fast is the clock?
I usually print everything using 4 perimeters and 30% cubic infill. I am not sure how much the weight of the pendulum arm and bob affects the frequency. The pendulum bob gets filled with US pennies which are copper plated zinc. They are around 20% lighter than copper pennies.
The pendulum period is also affected slightly by the pendulum amplitude. A very shallow pendulum will run faster than a larger amplitude.
Start by making sure the bob is filled with something around the density of steel or copper. Then lower it as much as possible using just one adjustment nut. You could also try adding more weight into the motor module to increase the pendulum amplitude. A final solution would be to increase the length of the lower pendulum arm. You might be able to increase the length by 3-4% and still get it to fit. The best fix would be to modify it in CAD to extend by any amount.
Steve