Hi Steve,
Work has let off a bit and over the weekend I managed to get the pendulum electric clock dialled in. I actually used all of the techniques for minimising friction that you mention for the pendulum wall clocks and hence my amplitude is rather large and I had to have a few goes at tweaking the length and position of the static and active paws.
I am now pretty sure that I do not get any "2 second" pushes which would make the clock run fast. I will be checking this over the next few days.
It actually looks really great.
However, with the pendulum bob all the way at the bottom I am seeing the clock running about 1 to 2 minutes fast for every hour.
Assuming that I do not get any 2 second pushes I'm really not sure how to slow it down because the period of the pendulum is governed by the length of the pendulum and I cannot take the bob any further down.
Any ideas??
Krys S
That's good to hear. The accuracy seems similar to my clock. The pendulum length will change with temperature. PLA or any other plastic has a fairly high coefficient of expansion with temperature, but I find that most of my clocks are still reasonably accurate.
I don't think the carbon fiber shafts used in some of my earlier clocks are worth the extra effort. It might have been different 200 years ago when houses had large temperature swings every day. Modern heated and air-conditioned houses reduce most of the need for temperature compensation.
Steve