Method and system for positioning ink-metering components relative to a duct roller of a printing machine
AssigneeMAN Roland Druckmaschinen AG
InventorAndreas Lippold
Life of this patent
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Abstract
A method and system are provided for establishing a reference position of ink-metering elements relative to a duct roller of a printing machine. The reference position is established by moving the ink-metering element toward the duct roller while acoustically sensing for contact. When a noise level indicative of the ink-metering element being in contact with the roller is detected, the reference, or zero position is established. At that precise moment, a representative value which varies with the distance between the element and the roller is stored as the zero position.
Claims15
A method for establishing a reference position for an ink-metering element relative to a duct roller of a printing machine, the method comprising the steps of:
- creating a bore in the ink-metering element;
- inserting an acoustic sensor into the bore for acoustically coupling the ink-metering element to the sensor;
- rotating the duct roller;
- moving the ink-metering element toward the rotating duct roller;
- monitoring the physical position of the ink-metering element;
- acoustically sensing a sound level at the acoustic sensor in the bore within the ink-metering element;
- and
- upon sensing a predetermined change in the sound level which is indicative of the ink-metering element contacting the rotating duct roller, recording the physical position of the ink-metering element as the reference position.
A system for establishing a reference position for an ink-metering element relative to a rotating duct roller of a printing machine, the system comprising:
- means for providing a signal corresponding to the distance between the ink-metering element and the duct roller;
- an acoustic sensor associated with the ink-metering element which senses a sound level in the environment surrounding the ink-metering element and provides an electrical output signal corresponding thereto;
- evaluating means responsive to the electrical signal output by the acoustic sensor for providing a first signal indicative of a sensed sound level below a threshold level and a second signal indicative of a sensed sound level above the threshold level;
- a motor for moving the ink-metering element relative to the duct roller;
- and
- control means for operating the motor to move the ink-metering elements relative to the duct roller, and for receiving and controlling storage of the signal corresponding to the distance between the ink-metering element and the duct roller, wherein the control means stores the distance signal as a reference position for the ink-metering element when the evaluating means changes from outputting the first signal indicative of a sound level below a threshold level to outputting the second signal indicative of a sound level above a threshold level, the sound level changing when the ink-metering element contacts the duct roller.
A system for establishing a reference position for an ink-metering element relative to a rotating duct roller of a printing machine, the system comprising:
- means for providing a signal corresponding to the distance between the ink-metering element and the duct roller;
- a bore disposed in the ink-metering element;
- an acoustic sensor disposed within the bore and acoustically coupled to the ink-metering element which senses a sound level in the environment surrounding the ink-metering element and provides an electrical output signal corresponding thereto;
- evaluating means responsive to the electrical signal output by the acoustic sensor for providing a first signal indicative of a sensed sound level below a threshold level and a second signal indicative of a sensed sound level above the threshold level;
- a motor for moving the ink-metering element relative to the duct roller;
- and
- control means for operating the motor to move the ink-metering elements relative to the duct roller, and for receiving and controlling storage of the signal corresponding to the distance between the ink-metering element and the duct roller, wherein the control means stores the distance signal as a reference position for the ink-metering element when the evaluating means changes from outputting the first signal indicative of a sound level below a threshold level to outputting the second signal indicative of a sound level above a threshold level, the sound level changing when the ink-metering element contacts the duct roller.
Dependencies are inferred from the claim text.