SP14 - Assembly of Gear 9
Hi Steve,
I am about to build SP14 - the large moon phase clock.
When trying to set up gear 9, the M3x8mm screw in gear 9b_5 cannot be screwed in tightly enough to fasten gear 9_5 to the 1.5mm arbor. The thread in the gear is not stable enough. I printed gear 9b again with 7 perimeters and an infill of 40% (cubic), but that couldn't be fastened either.
Do you have any suggestion how to print gear 9b_5 so that the screw can be tightened sufficiently?
Kind regards from Germany
Bernhard
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Hi Steve,
thank you very much for the great design of the Lange Moon Phase Clock SP14 and for the excellent documentation of the build and debugging-process!
My model is working since the final setup on Dez. 14th 2025. It stopped only once with the weight sitting on the floor. when I forgot to wind it up. The time it quite accurate. Deviations are about 1-2 min per week.
During setup it was very important to remove the factory grease from the bearings. The swing test showed that the pendulum swung for 25 min. The connection of the parts of the pendulum was quite loose, so I fixed them using a peace of tape.
The diameter of some gear shafts was a litte bit too small, leading to radial clearance that seamed to be too big. So I taped the gear shafts to reduce the radial clearance.
Kind regard from Germany
Bernhard