Quote:
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.
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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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