MLD-S Tech-FB Library Description - Bosch Rexroth

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Rexroth MLD-S Tech-FB Library MLD-S Technology Library 1-41 Fig. 1-55: Required Probe Setup Note: The RegisterControllerType01 function-block expects "Continuous Measurement" of the probe function. In addition, "Marker Failure Monitoring" is required in case the expectation window is used. Required IndraLogic Steps • Include the library MX_Technology.lib in your IndraLogic project • Call the provided FB in your IndraLogic project. The FB’s should run in a high priority cyclic task Note: The response time between probe event and calculation of a new correction value is one task cycle. Consequently, the task cycle time should be as short as possible in order to get a fast response. Application Examples Die Cutting in Label Printing The following example shows a cutter on a label printing machine. Fig. 1-56: Register control of a die cutter Labels are printed on a composite material comprising a backing foil and a self-adhesive top layer. The unprinted grid is stamped and re-wound. The task of the register controller is to adjust the die cutting cylinder to the printed web. DOK-MLD-S*-TechFB*****-AW01-EN-D
1-42 MLD-S Technology Library Rexroth MLD-S Tech-FB Library The die cutting cylinder operates in phase synchronization mode. The alignment on the printed web is provided by way of an adjustment of the phase offset. The sensor is connected to the drive control unit for the die cutting cylinder. The angle position (the position actual value) of the die cutting cylinder is recorded with the sensor signal. The position command for the register controller corresponds to the cylinder position in which it is correctly aligned onto the product. The correction value is calculated on the basis of the difference between reference and actual value and added to the current phase offset. The key settings of the probe function, register controller and drive operation mode of this application are: • Measured Value (Probe Function) = Position feedback 1 value (S-0- 0051) • Controlled Value (ControlledValueIDN) = Additive position command value (S-0-0048 or P-0-0691) • Drive operation mode = Phase synchronization Insetter Control The following figure shows an insetter control in an infeed application. Fig. 1-57: Insetter control on the infeed The infeed unit transports pre-printed material to a printing machine. After pre-printing and drying, the web is shrunk; the format length differs from the nominal format. The web must be elongated for further processing to include the register. The task of the register controller is to adjust the speed of the infeed rollers in such a way that the pre-printed web is extended to the nominal format. This assumes that one format is transported for each master axis revolution. The position command of the register controller relates to the master axis. The infeed roller operates in velocity synchronization mode. The velocity of the infeed roller is adapted via the gear ratio - fine adjust. The web elongation is correct if the print mark always passes beneath the mark reader at the same master axis position. The master position is recorded via the sensor signal. The mark reader is connected to the probe input of the infeed roller drive. The key settings of the probe function, register controller and drive operation mode of this application are: • Measured Value (Probe Function) = Resulting master axis position (P- 0-0775) • Controlled Value (ControlledValueIDN) = Gear ratio fine adjust (P-0- 0694) • Drive operation mode = Velocity synchronization DOK-MLD-S*-TechFB*****-AW01-EN-D
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MLD-S Tech-FB Library Description - Bosch Rexroth

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