This is a mini servo…only because I don’t have a micro with what I would call good resolution. It’s smaller than the first version.

Send me a drawing when you can as I tend to get stuck on an idea when there are many ways to solve this. My earlier ones are what I would call a plug valve but maybe you have a different idea. I like this latest version and it seems to work well. It can also be made smaller or bigger easily if needed. I can print square holes and plugs but the biggest limitation with all this is print orientation. A square hole is trouble if it’s horizontal. (Support for the roof).

the effort has been to try to get the required flow (about the area of a 2.5mm hole at max) over a full 90 degrees of servo travel. Testing shows a fairly benign criticality though as the bleed seems to have some range of acceptable setting throughout except very close to closed throttle




Getting smaller

Valve half open