Position control system and method
AssigneeCryovac, Inc.
InventorsAnthony V. Moscato, Theodore F. Cyman, JR., Paul Slagle
Life of this patent
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Abstract
A position control system includes a roller rotatable about a longitudinal axis thereof and a pivotable member having a first member end rotatable about a first pivot axis and a second member end coupled to the roller. The second member end is rotatable about a second pivot axis spaced from the first pivot axis and the first and second pivot axes are movable relative to one another. A motor is adapted to move the roller along the longitudinal axis wherein movement of the roller along the longitudinal axis causes the pivotable member to pivot the roller relative to the longitudinal axis. A control system is responsive to a sensed parameter for controlling the motor. A position control method is also disclosed.
Claims20
A position control system, comprising:
- a roller rotatable about a longitudinal axis thereof;
- a pivotable member having a first member end rotatable about a first pivot axis and a second member end coupled to the roller wherein the second member end is rotatable about a second pivot axis spaced from the first pivot axis and wherein the first and second pivot axes are movable relative to one another;
- a motor adapted to move the roller along the longitudinal axis wherein movement of the roller along the longitudinal axis causes the pivotable member to tilt the roller relative to the longitudinal axis;
- and
- a control system responsive to a sensed parameter for controlling the motor.
A web position control system for controlling a position of a web to be guided by a roller rotatable about a longitudinal axis thereof, comprising:
- a mounting structure that mounts the roller for rotational movement about the longitudinal axis, linear movement parallel to the longitudinal axis, and tilting movement relative to the longitudinal axis;
- a pivotable linkage having a first linkage end rotatable about a first pivot axis and a second linkage end coupled to the roller wherein the second linkage end is rotatable about a second pivot axis spaced from the first pivot axis and wherein the first pivot axis is fixed and the second pivot axis is movable relative to the first pivot axis;
- a motor adapted to move the roller along the longitudinal axis wherein movement of the roller along the longitudinal axis causes the pivotable member to tilt the roller relative to the longitudinal axis;
- and
- a control system including a web position sensor for controlling the motor.
A method of controlling lateral position of a web traveling over a roller wherein the roller is mounted for rotation about a longitudinal axis by first and second opposed shaft portions, the method comprising the steps of:
- providing a linkage having a first end rotatable about a fixed axis and a second end rotatable about a movable axis spaced from the fixed axis wherein the second end of the linkage is coupled to the roller;
- providing a mounting structure that mounts the roller for rotational movement about the longitudinal axis, linear movement parallel to the longitudinal axis, and tilting movement relative to the longitudinal axis;
- providing a motor coupled to one of the first and second shaft portions and adapted to move the roller along the longitudinal axis wherein movement of the roller along the longitudinal axis causes the linkage to tilt the roller relative to the longitudinal axis;
- sensing the lateral position of the web;
- and
- controlling the motor in response sensed lateral position of the web in turn to control lateral web position.
Dependencies are inferred from the claim text.