Method and apparatus for using magnetic bearings to position an inking unit roller in at least two different positions
AssigneeHeidelberger Druckmaschinen AG
InventorsJochen Bechtler, Rolf Spilger
Life of this patent
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Abstract
A method and a corresponding inking unit permit positioning of a roller into at least two different operating positions. The roller is, in particular, a vibrator roller of an inking unit for a rotary printing machine. The roller is positioned by controlling or regulating a magnetic bearing device in which the roller is mounted.
Claims19
A method of positioning a roller that can be moved into at least two different operating positions, which comprises:
- mounting the roller in a magnetic bearing device of a printing machine;
- positioning the roller into one of the at least two different operating positions by controlling the magnetic bearing device;
- and
- performing the positioning step using an oscillatory movement corresponding to a predefinable movement profile.
An inking unit for a printing machine, comprising:
- an inking-unit roller that can be moved into at least two different operating positions;
- a magnetic bearing device mounting said roller;
- said magnetic bearing device for positioning said inking-unit roller into any of said operating positions by controlling said operating positions;
- and
- a control unit operatively connected to said magnetic bearing device, said control unit having at least one current sensor for controlling the position of said inking-unit roller.
A printing machine, comprising:
- an inking unit including:
- an inking-unit roller that can be moved into at least two different operating positions;
- a magnetic bearing device mounting said roller;
- said magnetic bearing device for positioning said inking-unit roller into any of said operating positions by controlling said operating position;
- and
- a control unit operatively connected to said magnetic bearing device, said control unit having at least one current sensor for controlling the position of said inking-unit roller.
A method of positioning a roller that can be moved into at least two different operating positions, which comprises:
- providing the roller as a vibrator roller of an inking unit for a rotary printing machine,
- mounting the vibrator roller in a magnetic bearing device of the printing machine;
- positioning the vibrator roller into one of the at least two different operating positions by controlling the magnetic bearing device;
- providing a further roller as a roller selected from the group consisting of a ductor roller and an ink distributor roller;
- and
- performing the Positioning step to establish a contacting connection between the roller and the further roller to assume the one of the at least two different operating positions.
An inking unit for a printing machine, comprising:
- a vibrator roller having a diameter and a circumferential surface, said vibrator roller to be moved into at least two different operating positions;
- and
- a magnetic bearing device mounting said vibrator roller for positioning said vibrator roller into any of said operating positions by controlling said operating positions, and said magnetic bearing device consuming a current proportional to said diameter of said vibrator roller and serving as a wear indicator of said vibrator roller, using a degree of wear for measuring wear of said circumferential surface of said vibrator roller.
Dependencies are inferred from the claim text.