Weight Shell - Supports?
@Steve
Are we to use supports when printing the upper part of the weight shell? Or invert the shell with outer supports to hold it up? Whats the shooting solution here please? Support density? If you invert it, do you need supports for the base screw bosses on the inside?
Cheers
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@Mike Snider I use 0.12mm elephants foot compensation. PrusaSlicer assumes it is a negative number. The intent is to create a perfectly vertical wall. A small fillet is OK too. I have tried adding fillets or chamfers for looks, but the shape is too complex for the procedure to complete.
A belt seems like it should have the same accuracy across the entire range of travel. I would prefer that the Y axis have two motors so the tray can't rack sideways.
It is great having other experienced clock experts look over the designs and give feedback. I have no formal training, but I do read a lot of clock design books and have a very structured approach to problem solving. I still keep finding better ways of building things.
I would love to see any new ideas for the pendulum hanger. If you post them, they have a possibility of making it into some of my clock designs. I have tested many different materials and small ball bearings were consistently near the top of the list. Printed knife edges were not good. Other designs with a rolling surface did quite well. Narrow gauge guitar strings make great suspension springs. I deliberately did not include traditional clock suspension springs because I try to design using relatively easy to find materials. It would have been good to test them as a standard reference.
Steve