Thread Number: 70929
/ Tag: Modern Automatic Washers
Neat OOB Switch on SQ FL |
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Post# 939202 , Reply# 1   5/18/2017 at 13:00 (2,506 days old) by henene4 (Heidenheim a.d. Brenz (Germany))   |   | |
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This made in China crap that explodes in your face... Wait, those aren't made in China?!? Do you have a FL or TL? The OOB switch should just reset, and if the OOB is broken, it should not operate at all... |
Post# 939207 , Reply# 2   5/18/2017 at 13:32 (2,506 days old) by kb0nes (Burnsville, MN)   |   | |
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It's a pretty crude switch they use, just a contact that opens when a certain acceleration is reached. Not sure how quickly the control reacts to the opening of the switch or if they apply any breaking to slow the basket quickly. Assuming the switch acted normally, it may not have been able to prevent the door from popping open in this instance.
They really could be a tiny bit more sophisticated here. Multi-axis MEMS accelerometers are dirt cheap now (every smart phone has one) so it is a shame they haven't made the switch. It is how I see the SQ stuff though, heavy reliable construction but technically a bit unsophisticated. |
Post# 939210 , Reply# 3   5/18/2017 at 13:45 (2,506 days old) by Tomturbomatic (Beltsville, MD)   |   | |
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I'm not certain if it is a switch or just a good whack that knocked open the locked door. |
Post# 939212 , Reply# 4   5/18/2017 at 13:52 (2,506 days old) by henene4 (Heidenheim a.d. Brenz (Germany))   |   | |
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If its a FL which I assume cause the door was locked, your door lovk is most likely broken now... And those don't have OOB switch per se, I think they only use the MCU... |
Post# 939213 , Reply# 5   5/18/2017 at 14:00 (2,506 days old) by kb0nes (Burnsville, MN)   |   | |
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Tom, that is a good point. Tripping the OOB switch won't stop the machine, it will just slow the spin and enter a re-distribution routine. The door popping open is what killed it, it likely was displaying the flashing LED's that denote a door error code.
The simple switch sensor may not always be able to prevent this if something sudden and drastic happens in the basket. It is a bit similar to people thinking a the Rev limiter in a motorcycle engine management computer will protect the engine when they wack the throttle wide open in neutral. The acceleration of the rotating parts will be so quick it will well overshoot the maximum safe RPM before the smarts will take control back. It might be worth insuring the door latch is still solid as well as checking the OOB switch will still open. |
Post# 939230 , Reply# 7   5/18/2017 at 15:50 (2,506 days old) by gansky1 (Omaha, The Home of the TV Dinner!)   |   | |
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That sounds a lot like the OOB drama of a Maytag combo. I had that happen several times but I'm not sure if the tub hit the edge of the thick door glass flange or if the door just popped open when the machine landed back on the solid floor. Made Fred run for the hills when it happened in front him. It's quite exciting. True to Maytag form, once the door was closed again, it continued on with the "Attempt-to-Spin" cycle.
Never have seen that with my small-door 2004 SQ f/l. |
Post# 939252 , Reply# 9   5/18/2017 at 17:12 (2,506 days old) by kb0nes (Burnsville, MN)   |   | |
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Well it isn't accelerometer that is the "bloody menace", it is poor design and crappy software!
There does need to be a happy blend of software control built on top of a competent mechanical platform. It is when the manufacturers try to make a light weight, big basket, high RPM machine work through software that you end up with a mess. The SQ machines are the other side of the coin, built heavy with no nonsense. It reflects their commercial lineage. They could likely stand just a smidge more control sophistication though. |
Post# 939275 , Reply# 12   5/18/2017 at 18:48 (2,505 days old) by chetlaham (United States)   |   | |
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Post# 939329 , Reply# 13   5/19/2017 at 05:50 (2,505 days old) by Tomturbomatic (Beltsville, MD)   |   | |
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the door lock is still very much functioning. |
Post# 939335 , Reply# 14   5/19/2017 at 07:22 (2,505 days old) by mtn1584 (USA)   |   | |
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What were you washing? |