Patent ID: 8090463

Claim:
An operating method for an evaluation device for a production machine, wherein the production machine manufactures a product under control of a control device, comprising: providing the evaluation device and the control device for the production machine, wherein the production machine comprising drives and other components; storing desired positions, desired speeds and desired drive currents of the drives in the control device; receiving actual positions, actual speeds and actual drive currents of the drives of the production machine by the evaluation device during manufacturing of a product, wherein the actual positions, speeds and drive currents are detected by sensors at detection times; transmitting the desired positions, speeds and drive currents stored in the control device to the evaluation device; comparing, using the evaluation device, the actual positions, speeds and drive currents of the drives and the desired positions, speeds and drive currents of the drives transmitted to the evaluation device with pre-defined state combinations, wherein the pre-defined state combinations include pre-defined position ranges, pre-defined speed ranges and pre-defined drive current ranges; determining fulfilled state combinations based on the comparison, wherein a pre-defined state combination is fulfilled when the desired and actual positions, speeds and drive currents lie within the pre-defined position ranges, speed ranges and drive current ranges; selecting relevant states from the fulfilled state combinations, wherein the selection is made by the evaluation device for each fulfilled state combination; storing information of the relevant states together with the detection times by the evaluation device; and providing the information and the respective detection time of the relevant states for an other evaluation.