| 1st ALT | 2ndALT | 3rdALT |
Initial Design | Second Design | Final Design | |
In 54,000 Cycles, Fracture of helix is less than 1. | 170 cycles: 1/10 (10%) 5200 cycles: 1/10 (20%) 7780 cycles: 2/10 (40%) 8800 cycles: 2/10 (60%) 11600 cycles: 4/10 (100%) | 17,000 cycles: 1/6 (17%) 25,000 cycles: 3/6 (67%) 28,200 cycles: 1/6 (83%) 38,000 cycles: 1/6 (100%) | 54,000 Cycles: OK 75,000 Cycles: OK |
Helix Structure |
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Material and specification | PC + SUS (t = 1.2) GAP: 2 mm | PC + SUS (t = 1.2) GAP: 0 mm | PC + SUS (t = 1.2) GAP: 0 mm Added rib on side and front of helix |