Every way of stopping, on the same four questions
Six mechanisms that all turn a continuous input into an output that moves and then waits. Index is how far the output steps. Moving is the fraction of the input's turn the output is actually going for; the rest is dwell. From rest says whether the output starts and stops at zero velocity, and acceleration whether its acceleration is a number at all. Every entry is computed from the mechanism's own library, which matters for two of them: a Geneva's moving fraction is (n − 2)/2n and not 1/n, and its entry rate is zero in closed form rather than to the accuracy of a sampled sweep. The three rows whose acceleration is not a number are not badly made — they are mechanisms whose output velocity has a step, and no tolerance improves that.
Where it is used
- The mechanism that waits Motion that stops
- A joint that works one way Motion that stops
- Stopping thirty times a second Prescribed motion
- The resolution is the pitch Motion that stops
- The gear with its teeth cut away Motion that stops
- Where the tooth lets go Motion that stops
- The wheel that goes backwards Motion that stops
- Detached, and safe while detached Motion that stops
- Where the input stops deciding Motion that stops
- One piece, and still not reachable Motion that stops
- When the index law becomes a choice Motion that stops
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