I had a short peek at a datasheet for that. Apparently the pins are on a circle with a radius of 11mm, pin spacing is regular (those 27.7 degrees) and thus not a full circle.
KiCad can display polar coordinates:
But this does not seem to work for pad placement. You can generate a circular array (First place one pad, then right mouse button popup and: Create from Selection / Create Array.
Lines can be set with polar coordinates. So one option is to:
- Draw some lines with the right length and angle.
- Snap the grid origin to an endpoint of a line (Snapping system is a bit complicated in KiCad).
- Place a pad at that location.
- Repeat for the other pads.
This little test fitting tutorial I wrote 7 years ago may also be of interest:
I had a little peek at: Footprint Editor / File / Create Footprint / Circular Pad Array and created the screenshot below, But from what I can see, it always assumes the pads are on a full circle. I don’t see a start and end angle as retiredfeline implied.
