Rotating paying-off bottom detector for steel cord equipment spool

The utility model discloses a rotating paying-off bottom detector for a steel cord equipment spool. The rotating paying-off bottom detector comprises a paying-off spool, a driver for driving the paying-off spool to rotate, and a metering wheel matched with the cord of the paying-off spool; the rotating paying-off bottom detector is characterized by further comprising an encoder and a programmable logic controller, wherein the rotating shaft of the encoder is fixedly connected with the rotating shaft of the paying-off spool; the signal output end of the encoder is connected with the first signal input end of the programmable logic controller; the metering signal output end of the metering wheel is connected with the second signal input end of the programmable logic controller; the signal output end of the programmable logic controller is connected with the control signal input end of the driver. The rotating paying-off bottom detector for the steel cord equipment spool completely avoids fluctuation generated by paying-off tension when all the cord is completely unreeled and guaranteeing the product quality.