Specification
|
Target Numerical Value
|
Expected Tolerance
|
How to Measure
|
Max Diameter
|
2.42 in.
|
+/- 0.01 in.
|
Use calipers
|
String Gap
|
0.1 in.
|
+/- 0.02 in.
|
Use calipers
|
Total Mass
|
Use mass scale
|
||
Max Rotational Speed
|
4000 rpm
|
+/- 1500 rpm
|
Use strobe light tachometer
and/or high speed camera
|
Thickness (through axel)
|
1.63 in.
|
+/- 0.04 in.
|
Use calipers
|
Diameter of Spinner (Washer
inside)
|
0.34 in.
|
+/- 0.01 in.
|
Use calipers
|
Diameter of Spinner Length
(end to end)
|
1.47 in.
|
+/- 0.01 in.
|
Use calipers
|
Diameter of Earth Cap Piece
|
0.80 in.
|
+/- 0.01 in.
|
Use calipers
|
Diameter of Post
(attachment between Earth and Base)
|
0.290 in.
|
+/- 0.01 in.
|
Use calipers
|
Depth of Detailing on Earth
Cap Piece
|
0.039 in.
|
+/- 0.01 in.
|
Use depth gauge
|
Distance between Spinner
Washer and Base Shaft
|
0.02 in.
|
+/- 0.02 in.
|
Use calipers
|
*300 micron = 0.0118 in. tolerance estimated using
assumptions of tolerances due to injection molding and mold fabrication
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