Abstract: A process for the regulation or control of the flow of a viscous liquid, such as an adhesive or plastic substance, which is applied as seam (1) on a workpiece (2) by an applicator device (3) guided by a robot, whereby the viscous liquid of the applicator device is continuously supplied from a cylinder (7) in which a piston (9), shiftable by a drive mechanism (1) exerts a constant pressure on the liquid. According to the process, the path (x.sub.i) is measured which is passed by the piston (9) during the time in which the robot passes through a certain track section (n). The measured value (x.sub.i) for the piston path is compared to a set value (x.sub.s) for the piston path and the difference (x.sub.s -x.sub.i) is added during the subsequent passing of the same track section during the next work cycle, as a correction set value (K) algebraically to a basic set value (f.sub.sg) for a regulation or control of the nozzle opening of the applicator device (3).