Hi,
I've designed a new bob, so it can be filled with bb gun snot as well, be about 100g heavier to improve Q, but most of all to look beautiful. And it does! :) here is free scad file if someone else finds it useful
Thank you
Slava
Last week I acquired SP16 from myminifactory, and promptly decided I wanted to put my own face on it: normal (arabic) numerals, but with the hour and minute markings round the outside edge as on the dials with the Roman numerals. Because.
Anyway, I messaged Steve about it, and he promptly and kindly uploaded the dial parts in .step format, making it far easier to hack my own dial onto it.
The deed was therefore done, I printed everything, and did a pendulum swing test; after 20 minutes it was still moving quite perceptibly, so I finished the build and started it up with 1.8kg of diving weights hanging directly off it. After an hour the pendulum amplitude had settled at about 4.8° each side, then it gradually increased overnight to about 5.5° after 12 hours. I assume this means it is being run in, and friction is still decreasing.…
Looks great. The dial has really nice proportions.
Mechanically, reducing the winding drum diameter should have the same effect as a block and tackle. Both provide longer runtimes if the weight is increased.
The winding drum on this clock is just slightly larger than the lower support post, so a smaller diameter would cause the string to rub. This would require a secondary pulley. Or similar to some of Brian Law's clocks, attach the far end of the cord to the wall off to the side. This change reduces the weight pulling down on the frame.
Steve
I printed Steve's latest project and here's my summary of my observations, all positive:
- It prints without any problems
- Assembly is even easier than the other clocks (I printed and assembled the SP5, SP13, SP14, and SP15), just paying more attention to the correct spacing of the gears on the axes
- It works right out of the box with just 3 kg of weight on the pulley.
I actually think it could become the easiest and most convenient project for anyone wanting to get started in this fantastic hobby.
As usual, my compliments to Steve
Very well done! I'll have to tackle this as one of my next projects. The great thing about 3D printing as a hobby, you never run out of things to do
Nice.
Double check the mounting screw depth and adjustment on the lower standoffs. There shouldn't be much sag with 6lbs of weight. Most of the designs build in about 0.01-0.02" of upward slant to account for some sag.
Looks good. Thanks for sharing the design.
Some of my clocks have an updated bob with more open space to fill with BBs.