Bidirectional tidal flow

[sphelps]

Originally Posted by golf nut

If you have a jammed drum, then the smart motor or extra sensors will do nothing, unless they are smart enough to phone you and or take the unit apart.

When using a 2 way version the orientation of the magnet is changed deliberately so that it isn't possible to get out of whack.

Correct if the drum is completely jammed but typically the drum will just need more than an quick pulse to overcome the static friction. The closed loop control has feedback and therefore will activate the motor until it actually moves and hits the next switch. Unlike the open loop which won't know the difference and could end up in an infinite loop. You could also program an error code with a closed loop control system so a lite or alarm is triggered if the drum doesn't move within a set time limit. All this is called error proofing which is an important part of designing a control system.

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[golf nut]

Originally Posted by sphelps

Correct if the drum is completely jammed but typically the drum will just need more than an quick pulse to overcome the static friction. The closed loop control has feedback and therefore will activate the motor until it actually moves and hits the next switch. Unlike the open loop which won't know the difference and could end up in an infinite loop. You could also program an error code with a closed loop control system so a lite or alarm is triggered if the drum doesn't move within a set time limit. All this is called error proofing which is an important part of designing a control system.

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In my lifetime I have built thousands of machines, I am well aware of dummy proofing.

I just did a simple test for you. the result is that if the drum stalls the sensor keeps the motor running, it isn't a quick surge, it remains running till the sensor sees the decay and the the timer starts once it sees the next magnet, if the magnet doesn't move the motor stays on.