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A comment on EU to make it mandatory to use customer-replaceable batteries in household items. Parent comment

Re:EU to make it mandatory to use customer-replaceable batte... by ethbr0 on Sunday March 13, 2022 @11:16AM (#30661948)
Re: sacrificial parts, I recently had to rebuild a two-car wood (read: heavy) torsion spring garage door system.

The cleverest part was the plastic coupler [0] between the door-connected shaft and motor.

When the system originally locked up, the coupler broke. Consequently after restoring the system, I needed a $9 piece of plastic, rather than a $xxx new motor.

Made me sad that more modern things aren't designed with such value-protective degradation modes.

[0] https://www.amazon.com/LiftMaster-Coupler-Chamberlain-Crafts...

[ Parent | on HN ]
Re:EU to make it mandatory to use customer-replaceable batte... by a_mechanic on Monday March 14, 2022 @10:24PM (#30681055)
FYI motor couplings are not typically designed to fail as a method of protecting the motor. Overload protection is usually handled electrically, with fuses/circuit breaker which will remove power when too much load is applied to the motor (stuck door) or via controller board and load sensing.

https://www.prairielectric.com/blog/how-do-circuit-breakers-...

[ Parent | on HN ]