[FR] Small Perimeter Control

[CCS86]

Version 2.2.53

Win10 64

Ultimaker Original + Duet Maestro

Currently, there seems to be a hardcoded value determining what is and is not a "small perimeter". For me, this value seems too high, and on prints like this, it creates odd speed distribution (model footprint ~ 18x7mm):

For ideal levels of control, I would propose the following:

small_perim_min = 0.5 mm
small_perim_min_speed = 12 mm/s
small_perim_max = 5.0 mm
small_perim_max_speed = 25 mm/s

With these 4 settings, you can bound the upper and lower limits of what defines a "small perimeter", by size; assigning a specific speed to each boundary, and interpolating between them.

In the above example, you could print a 1mm diameter hole, with a speed of 12 mm/s,. But, by the time you reach a 10mm diameter hole, speed is twice as fast.

This would also help reduce jumps in flow rate, as each perimeter moving outwards gets larger, has an interpolated jump in speed, instead of the full transition from a fully slow "small" speed, to normal perimeter speed.

[CCS86]

Beautiful, thanks Merill!