The uses of three types of SMT Trimmer Potentiometers

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yq-leng

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The are three different types of SMT Trimmer Potentiometers: Automatic Trimming Adjustment type（EVM3Y）、Both Sides Adjust type(EVM3S) and Back Side Adjust type(EVM3R).What are difference and the uses of them?
 

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EVM3S can be adjusted from both sides of the board.
EVM3R can be adjusted from the bottom of the board only.
EVM3Y is an auto adjustable pot - sounds too good to be true - how does it know what to adjust to
 
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    yq-leng

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I think the automatic adjust just means it is compatible with electric adjustment screwdrivers used in production.

Keith
 
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