Following a design made days ago this is meant to apply
constant pressure on the chain without creating unnecessary resistance. The length of the bolt determines the maximum
height of the skate wheel but its final height is adjustable by the nuts
surrounding it.
Sketch of design
A ceramic magnet base was purchased. This is simply a steel cup surrounding a magnetic
donut. The cup usually has a hole in the
center. The hole in this magnet was
drilled from 3/16” to 5/16” ø.
The hole is 5/16", not the diameter of the magnet
The only height adjustment necessary was to put two flat
washers between the bolt head and the skate wheel bearings. The nut which would have held to the bottom
of the magnet base was eliminated to allow the wheel and bolt to move so a
rubber band could apply tension as opposed to a hard position set by place the
magnet and wheel near the chain.
Rubber band to apply tension
Movement of chain tensioner
To do:
Physically install Arduino and shield
Test + Debug
Revise documentation
Journal page
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