objective: radiused outer section.
I got this far by using circular array on a radiused rectangle (2 mm x 10 mm), converting it to a group and subtracting it from the circle. The resulting shape has sharp corners.
Below: one of the starting shapes:
Below: a better starting shape:
The result of the first shape:
Result of the second shape:
Manual radius starting point:
This one above is a hit or miss sort of build. I duplicate it, rotate it n/360 degrees and make a third copy for correct spacing, left and right. Manual dragging of the radius ends to join the neighbor, then rotate that in a circular array.
I have to enter node editing to ensure the paths join properly, as the close paths or join paths feature doesn’t work on this type of structure, as best as I can tell.
Here’s the result after joining blocks, duplicating, rotating, etc.:
Is there an easy way to “soften” the edge circle in a semi-automated/boolean manner?