Advancing means for a multi-coordinate measurement table of a coordinate measuring device and method for controlling such an advancing means
AssigneeVistec Semiconductor Systems GmbH
InventorTillmann Ehrenberg
Life of this patent
Estimating the term…
Abstract
An advancing means for a multi-coordinate measurement table including a drive unit having a friction rod and a motor for each coordinate axis (x, y). The motor contacts one side of the friction rod with its motor shaft and at least one press roller contacts the other side of the friction rod. At least one pressing means is provided biasing the press roller, the friction rod and the motor shaft against each other with a pressing force, whereby the motor shaft frictionally engages the friction rod and converts the rotational movement of the motor into a linear movement of the friction rod. A method for controlling such an advancing means is disclosed as well.
Claims7
An advancing means for a multi-coordinate measurement table of a coordinate measuring device, said measurement table comprising at least one coordinate axis, said advancing means comprising:
- a drive unit arranged for each of said at least one coordinate axis, each of said drive unit comprising a friction rod and a motor, said motor comprising a motor shaft, wherein said motor shaft contacts a first side of said friction rod;
- at least one press roller in contact with a second side of said friction rod, wherein said first side is opposite said second side;
- two support rollers in contact with said motor shaft, wherein said two support rollers are arranged on a pressure roller holding element or a frame section;
- at least one pressing means arranged to bias said at least one press roller, said friction rod, said two support rollers and said motor shaft against each other with a pressing force, wherein said motor shaft frictionally engages said friction rod and converts rotational movement of said motor shaft into a linear movement of said friction rod;
- and,
- an adjusting means comprising a pivot arm and associated with said pressing means, wherein said two support rollers are arranged on said pivot arm, said pivot arm is pivotable about a stationary axis and said adjusting means is arranged to variably adapt said pressing force depending on an acceleration of said friction rod.
A method for controlling an advancing means for a multi-coordinate measurement table of a coordinate measuring device, said measurement table comprising at least one coordinate axis, said method comprising the steps of:
- providing a drive unit arranged for each of said at least one coordinate axis, each of said drive unit comprising a friction rod and a motor, said motor comprising a motor shaft, wherein said motor shaft contacts a first side of said friction rod and at least one press roller contacts a second side of said friction rod, said first side is opposite said second side;
- contacting two support rollers with said motor shaft, wherein said two support rollers are arranged on a pressure roller holding element or frame section;
- providing at least one pressing means arranged to bias said at least one press roller, said friction rod, said two support rollers and said motor shaft against each other with a pressing force, wherein said motor shaft frictionally engages said friction rod and converts rotational movement of said motor shaft into a linear movement of said friction rod;
- and,
- variably adapting said pressing force acting on said pressing means, wherein an adjusting means comprises a pivot arm and said two support rollers are arranged on said pivot arm, said pivot arm is pivotable about a stationary axis and said adapting depends on an acceleration of said friction rod.
Dependencies are inferred from the claim text.