Hi Steve,
Many thanks for SP5B. The parts are already printing.
I have read your note in your new instructions regarding the new gear profile to minimise static friction etc.
Steve,
Which clocks are effected by this phenomenon. I presume: SP4, SP5, SP8, SP13 & SP14. Is the crazy gear pendulum clock SP12 also effected?
Why is this happening after a certain time? Is it because PLA "flows" and thus changes shape or wears. Not too sue what to think here.
I have a number of SP8s which are stopping even though I have added some more weight.
Cheers
Krys S
The problem is still a bit mysterious. It mostly affects clocks with involute gears and will be worse when there are the lowest number of pinion teeth. So SP5 with 10 tooth pinions is (was) worse than SP4 with 14 tooth pinions. The shorter runtime options are more capable of powering through the issue with additional drive weight. SP5 has been fixed, and I am just starting to look at SP4.
SP13 has a lot of margin with small lightweight gears and only an 8 day runtime. Not sure yet if it needs any edits to make it more robust.
SP14 could use some minor improvements. I have been working on a much smaller edit than the SP5 update. It only affects between gear 4 and the pallet. It is undergoing testing right now.
I am not sure about SP8. It uses a modified cycloidal gear tooth profile. It was designed many years ago, so it probably needs to be analyzed again with the latest knowledge. The power delivery is completely different than all other clocks. I don't know if it behaves more like an 8 day clock or a 32 day clock.
Regarding the second question, I don't really know what changes over time. I don't think it is wear. One clock that has been running for 5 years shows only a very light polishing on the teeth. It could be deformation under load. Or something in silk PLA that migrates to the surface.