Coordinate Measuring Machine and Method for Operating a Coordinate Measuring Machine
First Claim
1. A method for operating a coordinate measuring machine having a coordinate measuring device movable in at least one direction and driven by at least one electric motor, which comprises the steps of:
- a) measuring an electrical drive current flowing through the electric motor to move the electric motor and in this way to move the coordinate measuring device;
b) determining one of a limit value and a limit value range defined by a lower limit value and an upper limit value for the electrical drive current in dependence on at least one of a set speed and a set acceleration at which one of a movement of the electric motor and a movement of the coordinate measuring device is intended to take place, and a functional relationship is fixedly predetermined between at least one of the set speed and the set acceleration on the one hand and a current limit value on the other hand; and
c) bringing the coordinate measuring device to a predefined state if one of the electrical drive current reaches the limit value, the electrical drive current exceeds the limit value, and the limit value range is departed from.
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Accused Products
Abstract
In a method for operating a coordinate measuring machine and to a coordinate measuring machine, a coordinate measuring device, of the coordinate measuring machine is moved in at least one direction while being driven by an electric motor. An electrical drive current which flows through the electric motor for moving the electric motor and, move the coordinate measuring device is measured. A limit value for the electrical drive current is determined on the basis of a desired speed and/or on the basis of a desired acceleration with which the electric motor or the coordinate measuring device is intended to move. If the electrical drive current reaches the limit value determined and/or if the electrical drive current exceeds the limit value determined, the coordinate measuring device is changed to a predefined state, by virtue of the computer or the microcontroller switching off one of the switches disposed in the current path.
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Citations
15 Claims
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1. A method for operating a coordinate measuring machine having a coordinate measuring device movable in at least one direction and driven by at least one electric motor, which comprises the steps of:
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a) measuring an electrical drive current flowing through the electric motor to move the electric motor and in this way to move the coordinate measuring device; b) determining one of a limit value and a limit value range defined by a lower limit value and an upper limit value for the electrical drive current in dependence on at least one of a set speed and a set acceleration at which one of a movement of the electric motor and a movement of the coordinate measuring device is intended to take place, and a functional relationship is fixedly predetermined between at least one of the set speed and the set acceleration on the one hand and a current limit value on the other hand; and c) bringing the coordinate measuring device to a predefined state if one of the electrical drive current reaches the limit value, the electrical drive current exceeds the limit value, and the limit value range is departed from. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A coordinate measuring machine, comprising:
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at least one electric motor; a coordinate measuring device movable in at least one direction, and driven by said electric motor; a current measuring device for measuring an electrical drive current flowing through said electric motor for moving said electric motor and in this way to move said coordinate measuring device; a set-value determination device for determining one of a limit value and a limit value range for the electrical drive current depending on at least one of a set speed and a set acceleration at which one of a movement of said electric motor and a movement of said coordinate measuring device is intended to take place, a functional relationship being fixedly predetermined between at least one of the set speed and the set acceleration on the one hand and a current limit value on the other hand; and an operating device connected to said current measuring device and to said set-value determination device and configured for bringing said coordinate measuring device to a predefined state if one of the electrical drive current reaches the limit value determined by said set-value determination device, the electrical drive current exceeds the limit value determined by the set-value determination device, and the drive current departs from the limit value range. - View Dependent Claims (14, 15)
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Specification