This is a 3D printed pendulum clock with an 8-day runtime and an accuracy of around 1-2 minutes per week.
The primary goal while designing this clock was to make it functional as an accurate time keeper. It has a deadbeat escapement which remains accurate with variations in weight or power train friction. I wanted it to have a long runtime so it would still be keeping time if I was away for a few days. It took a few refinements and a few internal metal components to reduce friction enough to allow an 8-day runtime.
The gear outlines and escapement were designed using Gearotic with final cleanup in TurboCAD. All the parts were printed on a Prusa MK3 in PLA with a standard single color print head. Layer changes were used to print highlights on the dial. The total print time is just under 90 hours.
The design was made to look as much like a traditional brass clock as possible. The gears were printed in gold and made as symetrical as possible. I wanted a traditional Roman numeral dial including the use of "IIII" instead of "IV" at 4 oclock.
This design has evolved for about 6-8 months until it has reached the current form. I am quite pleased with how it looks. It won a prize in the Hackaday.io 3D Printed Gears, Cams, and Pulleys contest at https://hackaday.io/project/163814-3d-printed-pendulum-clock. It also has a really bad YouTube video at https://www.youtube.com/watch?v=imYTm0Vh5TA (Mostly, just proof that it works)
22-Apr-19 Update: Added keyhole_hanger.stl that can be used if you have trouble finding metal keyhole hangers. Print with at least 50% density. Also added split versions of front and back frames to be used on printers with small print plates. The front/back_frame_split_top.stl and front/back_frame_split_bottom.stl files replace the one-piece frame components. Epoxy the parts together with 2" pieces of 6-32 threaded rod for strength.
gold, tan, black, ivory
Printed using a Prusa MK3 with a standard 0.4mm nozzle. Set seam position to random. No supports or rafts are needed, but a few tall parts can benefit from a brim.
See the file SP1_Build_Notes_2019_Mar.pdf
Designed using Gearotic for the gear tooth profiles and TurboCAD for the CAD rendering.