Improved control device of small tension of arranging machine

The utility model relates to the numerical control placement field, in particular to an improved placement machine small-tension control device of a composite material textile placement machine of carbon fiber, glass fiber, aromatic polyamide, and fabric cloth. A main frame is provided with two guide rolls, a tension roll is arranged between the two guide rolls, a tension sensor is arranged below the tension roll, and a servomotor is arranged on the main frame. The control device has the characteristics of simple structure, convenient use and low cost, and replaces the power provided by an original wind-up roll and the brake force provided by a magnetic powder brake by the servomotor; the replacement is that when the placement machine works, the placement machine overcomes the self-resistance of the magnetic powder brake, reduces the resistance of a system, ensures that the tension does not rise, reduces a resistance value of the tension T, and realizes the placement of small tension, and the function of yarn