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311 Door Trouble

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(@Greg1234)
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Topic starter   [#20776]
Has anyone ever had an Otis door operator on a 311 work OK after a learn cycle but then turn around and do what looks like a high speed clamping in both open and close?Door board and encoder have been replaced, thx.



   
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(@Indirtwetrust)
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I have seen that on an AT-400 Linear operator with stripped coggs on the belt.



   
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(@pieman)
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What type of operator ?



   
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