Here's the problem with the momentary on-off-on toggle switch.
The actuation regions of the switches I've been using are inconsistent from switch to switch. And, those regions may change over time.
What this thing needs is a switch mechanism with these criteria:
- Snap action contact, with hysteresis (the trip/reset zone).
- Contacts only after 9-10 degrees of shift shaft rotation, from center.
- Tolerant of vibration, heat, oil, water, dirt, language.
- Which probably means sealed.
- Fine-tune adjustability at the endpoints.
The most important part is to have NO chance of switch activation until the final 1-2 degrees of rotation. The little clamp lever swings a 3/4" (19mm) radius. 1 degree of rotation gives 0.013" (0.33mm) of travel. For adjustability, that's a small fraction of a turn for a setscrew.
The actuation regions of the switches I've been using are inconsistent from switch to switch. And, those regions may change over time.
What this thing needs is a switch mechanism with these criteria:
- Snap action contact, with hysteresis (the trip/reset zone).
- Contacts only after 9-10 degrees of shift shaft rotation, from center.
- Tolerant of vibration, heat, oil, water, dirt, language.
- Which probably means sealed.
- Fine-tune adjustability at the endpoints.
The most important part is to have NO chance of switch activation until the final 1-2 degrees of rotation. The little clamp lever swings a 3/4" (19mm) radius. 1 degree of rotation gives 0.013" (0.33mm) of travel. For adjustability, that's a small fraction of a turn for a setscrew.
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