Originally Posted by
Cat 1
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
yeah, size is different to judge in pics, I was going by the assumption that 4 attachment lugs meant a standard size servo, as most my smaller ones only have 2...
On the bolded, I would think that a progressive opening aperture could make the area near idle less critical? Something like a triangular opening in the valve plug against a circular opening in the housing?
Just thinking out loud here.
Normally plug and housing having both a round aperture, results in a very regressive opening characteristic, and even a theoretically linear shape, like "square on square" is not as linear as it seems, despite the flow-area is mathematically linear to opening angle.
But a triangular opening is not suitable for a plugtype, that would be more fitting for your earlier linear slide valve design.
I'll have to think about that...