The invention relates to an open-loop control process for the motional
guidance of conveyed material (32) in a conveying device (30) and to a
corresponding conveying device (30). The conveying device (30) has a
movable means (36) for realizing the conveyance and a first motion
detector (42) for measuring a first actual position value (x1.sub.act)
for the movable means (36) and a second motion detector (40) for
measuring a second actual position value (x2.sub.act) for the conveyed
material (32). The control is herein realized with a position control
having a position control clock (T.sub.pc) and with a speed control (GR)
having a relatively faster speed control clock (T.sub.sc), in which, in
the position control clock (T.sub.pc), desired position values
(x.sub.cmd) are preset as the command variable and, in the speed control
clock (T.sub.sc), registered first actual position values (x1.sub.act)
are fed back to the position control, in which the position control is
provided, at least in part, in an open-loop control part (NC) and the
speed control (GR) is provided in a drive part (A), and in which a
control variable (R) is fed back into the position control, which control
variable is dependent on second actual position values (x2.sub.act)
registered in the position control clock (T.sub.pc). A high accuracy and
dynamic can thereby be obtained.