wekyrich9111
Electrical
thread277-335847
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pls how can I use npn sensor as a zero speed monitor on a rotary machine
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BrianPetersen
Mechanical
What are you trying to do with the outcome of this sensor?
Explain to us why you cannot buy an already-engineered speed-monitoring switch and use that instead. There is one type that uses a trigger-wheel (a sprocket often works) and a couple of sensors, there is another type that measures back-EMF at an induction motor. If there is anything remotely safety-related to what you are doing with the outcome of this switch (e.g. using it to hold a guard-locked door closed) you had better be really careful about this.
Explain to us why you cannot buy an already-engineered speed-monitoring switch and use that instead. There is one type that uses a trigger-wheel (a sprocket often works) and a couple of sensors, there is another type that measures back-EMF at an induction motor. If there is anything remotely safety-related to what you are doing with the outcome of this switch (e.g. using it to hold a guard-locked door closed) you had better be really careful about this.
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wekyrich9111
Electrical
Ok thanks a lot petersen now I have gotten an idea on what to do.
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