Difference between revisions of "Robot Arm"
From ENGR005_2012
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==Testing - Results== | ==Testing - Results== | ||
− | {| class="wikitable" | border="1" | cellspacing="0" | + | {| class="wikitable" | border="1" | cellspacing="0" |
|- | |- | ||
! Team !! Predicted Deflection (5N) !! Measured Deflection (5N) !! Ratio | ! Team !! Predicted Deflection (5N) !! Measured Deflection (5N) !! Ratio | ||
|- | |- | ||
− | | F || | + | | F || 1.45 mm || 1.83 mm|| 0.79 |
|- | |- | ||
− | | G || | + | | G || 0.75 mm || 1.50 mm || 0.55 |
|- | |- | ||
− | | H || | + | | H || 1.05 mm|| 1.15 mm || 0.91 |
|- | |- | ||
− | | J || | + | | J || 1.20 mm || 1.87 mm || 0.64 |
|- | |- | ||
− | | K || | + | | K || 0.90 mm || 2.00 mm || 0.45 |
|- | |- | ||
− | | L || | + | | L || 0.65 mm || 1.28 mm || 0.51 |
|- | |- | ||
− | | P || | + | | P || 0.975 mm || 2.45 mm || 0.40 |
|- | |- | ||
− | | Q || | + | | Q || 0.985 mm || 2.45 mm || 0.68 |
|- | |- | ||
− | | R || | + | | R || 0.96 mm || 1.86 mm || 0.52 |
|- | |- | ||
− | | Mickey Mouse || | + | | Mickey Mouse || 3.1 mm || 3.3 mm || 0.95 |
|} | |} | ||
+ | |||
+ | The ratio between calculated and measured deflections was 0.69 (with a standard deviation of 0.22). The number used for the Young's modulus of the ABS plastic was 2.0 GPa. Since measured deflections were consistently higher than calculated (by a factor of 0.69) a Young's modulus of 2/0.69=2.9 GPa would be more accurate. |
Revision as of 13:54, 22 October 2012
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Teams - Score
Best Score Achieved (smaller is better).
- Team F - .17 mm-in^3
- Team G - .14959 in^3
- Team H - .182 mm*in^3
- Team J - 0.199mm-in^3
- Team K - .145597 mm-in³
- Team L - 0.124063 or 0.12 mm * in^3 (2 significant figures).
- Team P - .195 mm*in^3
- Team Q - .148 mm-in^3
- Team R - 0.167 mm*in³
Testing - Results
Team | Predicted Deflection (5N) | Measured Deflection (5N) | Ratio |
---|---|---|---|
F | 1.45 mm | 1.83 mm | 0.79 |
G | 0.75 mm | 1.50 mm | 0.55 |
H | 1.05 mm | 1.15 mm | 0.91 |
J | 1.20 mm | 1.87 mm | 0.64 |
K | 0.90 mm | 2.00 mm | 0.45 |
L | 0.65 mm | 1.28 mm | 0.51 |
P | 0.975 mm | 2.45 mm | 0.40 |
Q | 0.985 mm | 2.45 mm | 0.68 |
R | 0.96 mm | 1.86 mm | 0.52 |
Mickey Mouse | 3.1 mm | 3.3 mm | 0.95 |
The ratio between calculated and measured deflections was 0.69 (with a standard deviation of 0.22). The number used for the Young's modulus of the ABS plastic was 2.0 GPa. Since measured deflections were consistently higher than calculated (by a factor of 0.69) a Young's modulus of 2/0.69=2.9 GPa would be more accurate.