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Post by drooster on Jan 3, 2017 11:30:33 GMT -8
This thread might be here in 'other types' or may be suitable for 'experiments'.
I'm asking for choices for a primary air control which (unlike a slider or a standard threaded disc) has a non-linear progression where the air flow is altered by large amounts while very open and by small amounts when almost closed.
There must be elegant solutions already developed.
I'm thinking a basic cammed lever right now, and my aim is for a top-hinged firebox door in which the bottom door-gap is the primary air control itself.
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stoker
Junior Member
Posts: 61
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Post by stoker on Apr 30, 2017 8:30:52 GMT -8
How about a slider that covers/uncovers a slot which is narrow at one end, wide at the other?
So when you start to open it, you're uncovering the narrow part.
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alext
New Member
Posts: 9
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Post by alext on Apr 12, 2018 11:39:21 GMT -8
This thread might be here in 'other types' or may be suitable for 'experiments'. I'm asking for choices for a primary air control which (unlike a slider or a standard threaded disc) has a non-linear progression where the air flow is altered by large amounts while very open and by small amounts when almost closed. There might be couple of option. First is motorized damper with stepper motor controlled by Arduino controller. Pretty inexpensive way to get any linear movement synchronized with time or temperature or something else. Plus there might be possibility to control some other parameters like temperature at several points of the core body, CO2 and CO limit control, etc. Here is an example motorized damper. It might be also linear slider driven by stepper motor You can also use bimetallic coil to run shutter depends of temperature. I used it couple of times to control fireplace exhaust damper. |
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Post by pigbuttons on Apr 23, 2018 19:16:12 GMT -8
You might try something like the 'f-stop aperture diaphragm' for cameras. Just search for images and you'll find a wealth of styles and designs.
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Post by gadget on Mar 19, 2019 21:56:33 GMT -8
This thread might be here in 'other types' or may be suitable for 'experiments'. I'm asking for choices for a primary air control which (unlike a slider or a standard threaded disc) has a non-linear progression where the air flow is altered by large amounts while very open and by small amounts when almost closed. There must be elegant solutions already developed. I'm thinking a basic cammed lever right now, and my aim is for a top-hinged firebox door in which the bottom door-gap is the primary air control itself. How about some sort of nautilus shaped port cover?As you rotate it, exponential air flow is allowed.  |
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Post by Dan (Upstate NY, USA) on Mar 20, 2019 21:38:38 GMT -8
Wedge slider, simple works. The hole is a triangle, the more you open it the more of the triangle hole is exposed. Much more linear in flow rate.
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Post by drooster on Mar 21, 2019 11:48:55 GMT -8
Hey Wolf, stoker already described that, and while simple and correct,
the NAUTILUS would look way cooler!
If I can figure it out that'd look proper fancy.
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