To provide an apparatus and method for controlling the speed of a motor of a measuring pump for supplying a pressurized liquid to a distribution gun.
The apparatus has a pressure controller forming a 1st motor speed signal as a function of the speed of a conveyer transporting a base material to be changed, and a liquid pressure to be changed in the distribution gun. A flow controller forms a 2nd motor speed signal as a function of the speed of the conveyer to be changed. In the change of the speed of the conveyer, a motor speed controller feeds the 1st motor speed signal to the pump motor to work the motor at a speed to induce, supply a fluid to the distribution gun under a pressure to be changed in a ratio following the ratio of the change of the conveyer. When the maximum conveyer speed is detected, the motor speed controller feeds the 2nd motor speed signal to the pump motor to operate the motor at a speed fixed by the maximum conveyer speed.
SAIDMAN LAURENCE B
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