The Vinyl Circle

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Thumbnail for SME IV-Vi outboard pivot zone
Thumbnail for Fig 1
Thumbnail for fig 1
Thumbnail for Fig 1. SME IV-Vi outboard side view of pivot zone.
Thumbnail for Fig 2. Inboard side view of pivot zone.
Thumbnail for Fig 3. Lateral Effective Mass bracket bottom view. (Photo is flipped upside down, as if one was holding the bracket up in the air to look under it) (Black objects are hard enough to photograph. With 3D printing you get the added confusion of all the shiny "filamentations".)
Thumbnail for Fig 4. Lateral Effective Mass bracket top view. Bracket weighs about 25g. 40 total 1/4 inch cubes of Tungsten provide approx 195g of mass at about 2.6 inches off the rotation axis. The bracket material integrated moment, added, probably brings that up to about 205g effective mass at the 2.6" radius. Top of the bracket was designed to stay just below the top of the yoke - which comes fairly close to the turntable dust cover. (Tungsten cubes are among all kinds of handy weight distribution parts made available for the Pinewood Derby car customizing market. Yay competitive Dads!!)
Thumbnail for Fig 5. Bracket mounting area, prior to installation. Double stick tape sometimes makes an excellent, stable way to mate up parts w/o much stress transmission - and if you don't use too much area, it keeps things decently reversible! The shoulders on the underside of the bracket will contact those tape pads. Weight forces will press down through the relatively strong yoke assembly side frames. Once positioned, weight, balance, cushioning and stickiness will keep the bracket assembly quietly in place. The tie down heavy duty threads will be mostly just as safety - to keep me from accidentally knocking the assembly off.
Thumbnail for Fig 5. Bracket mounting area, prior to installation. Double stick tape sometimes makes an excellent, stable way to mate up parts w/o much stress transmission - and if you don't use too much area, it keeps things decently reversible! The shoulders on the underside of the bracket will contact those tape pads. Weight forces will press down through the relatively strong yoke assembly side frames. Once positioned, weight, balance, cushioning and stickiness will keep the bracket assembly quietly in place. The tie down heavy duty threads will be mostly just as safety - to keep me from accidentally knocking the assembly off.
Thumbnail for Fig 1. SME IV-Vi outboard side view of pivot zone.
Thumbnail for Fig 2. Inboard side view of pivot zone.
Thumbnail for Fig 3. Lateral Effective Mass bracket bottom view. (Photo is flipped upside down, as if one was holding the bracket up in the air to look under it) (Black objects are hard enough to photograph. With 3D printing you get the added confusion of all the shiny "filamentations".)
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