| 摘要 |
The invention concerns a method for controlling the operation of an actuator unit, comprising the steps: a) repeatedly reading the current fed to the actuator unit, b) a first comparison wherein the readings are compared with a first maximum level and if the readings are above the maximum level the electrical power fed to the actuator unit is cut off, c) a second comparison wherein two successive readings repeatedly are compared with each other and if the differences between the readings are below a first ramp level a number a steady state condition for the current fed to the actuator unit is detected, and d) if steady state is detected setting at least one overload detection limit on basis of a steady state reading of the current fed to the actuator unit. The invention also concerns a device for carrying out the method and a conveyor incorporating the device.
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