I'm wondering - would it be possible to use the same arbor size throughout an entire clock (apart from the drum). Can I use e.g. 3mm arbor size instead of a mix of 3mm and 1/16?
Maybe. Friction will be higher, so the runtime will need to be reduced or a larger drive weight will be required. I have not tried it, mostly because 1/16" or 1.5mm is easier to work with and cheaper.
Retrofitting 3mm into one of my existing clocks requires either drilling out the holes or modifying the STLs.
Enlarging a 1.5mm hole to 3mm will take away 2 perimeters. Some of the larger clocks probably have large enough gear shafts to allow drilling them out. The frame might be best to print using 5 perimeters, so 3 will be left after drilling.
If you modify the STLs, then there will always be clean holes with as many perimeters as you specify.
Maybe. Friction will be higher, so the runtime will need to be reduced or a larger drive weight will be required. I have not tried it, mostly because 1/16" or 1.5mm is easier to work with and cheaper.
Retrofitting 3mm into one of my existing clocks requires either drilling out the holes or modifying the STLs.
Enlarging a 1.5mm hole to 3mm will take away 2 perimeters. Some of the larger clocks probably have large enough gear shafts to allow drilling them out. The frame might be best to print using 5 perimeters, so 3 will be left after drilling.
If you modify the STLs, then there will always be clean holes with as many perimeters as you specify.