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  • Users: lyallst
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  1. lyallst

    DC tach failure - output 75% of nameplate

    I have a 60v / 1000rpm tach in the control loop for a 30kW DC motor. Recently the printing press that the motor drives has been running faster than rpm gauge is indicating. I have taken a reading of 45v on the tack leads while the motor was running at 1060rpm (measured with an optical hand...

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