Table 1 Comparison of the lengths of the third-level helix curve.
| Â | Standard length | Curve length(without corrected pitch) | Corrected pitch | Curve length(with corrected pitch) | Erro (without /with corrected pitch) |
|---|---|---|---|---|---|
First-level helix | 37.241918 mm | Null | Null | Null | Null |
Second-level helix | 59.809369 mm | 54.725263 mm | 10.106445 mm | 59.809467 mm | 5.084106/−0.98E−4 mm |
Third-level helix | 96.051997 mm | 99.642197 mm | 5.06543 mm | 96.051808 mm | −3.5902‬/1.89E−4 mm |
