Machine tool
AssigneeFanuc Corporation
InventorsGaku Isobe, Yoshihiro Watanabe
Life of this patent
Estimating the term…
Abstract
A machine tool includes a motor configured to rotate a spindle, a tool magazine holding a plurality of tools, and a controller. The controller has a storage unit storing motor information indicating that the motor is a synchronous motor. When the machine tool stops, while a tool exchange process is carried out, due to electric power outage, operation of a stop button, a value of a drive current of the motor, or a value output from the sensor, the controller uses a command for the synchronous motor, based on the motor information, as a part of a series of commands for recovery of the machine tool, where the tool exchange process is a process in which a tool attached to the spindle is changed with one of the plurality of tools of the tool magazine.
Claims4
A machine tool, comprising:
- a spindle;
- a motor configured to rotate the spindle;
- a tool magazine holding a plurality of tools;
- and
- a controller, wherein
- the controller has a storage unit that stores motor information indicating that the motor is a synchronous motor, and
- when the machine tool stops while a tool exchange process is being carried out in response to one of an input from a stop button, an instruction from the controller as a result of at least one of a drive current exceeding a threshold value and a force exceeding a threshold value, or an electric power outage, wherein the force is detected by a force sensor provided in the machine tool, the controller is configured to use a command for the synchronous motor as a part of a series of commands for moving the spindle to an origin position in order to recover the machine tool during a tool exchange process, the controller is configured to decide to use the command based on the motor information, the tool exchange process being a process in which a tool attached to the spindle is replaced with one of the plurality of tools of the tool magazine.
A machine tool comprising:
- a spindle;
- a motor configured to rotate the spindle;
- a tool magazine holding a plurality of tools;
- and
- a controller, wherein
- the controller has a storage unit that stores motor information indicating that the motor is a synchronous motor, and
- when the machine tool stops while a tool exchange process is being carried out in response to one of an input from a stop button, an instruction from the controller as a result of at least one of a drive current exceeding a threshold value and a force exceeding a threshold value, or an electric power outage, wherein the force is detected by a force sensor provided in the machine tool, the controller is configured to use a command for the synchronous motor as a part of a series of commands for moving the spindle to an origin position in order to recover the machine tool during a tool exchange process, the controller is configured to decide to use the command based on the motor information and on a situation in which a rotating position of a rotor of the motor is unrecognized, the tool exchange process being a process in which a tool attached to the spindle is replaced with one of the plurality of tools of the tool magazine.
A machine tool, comprising:
- a spindle;
- a motor configured to rotate the spindle;
- a tool magazine holding a plurality of tools;
- and
- a controller, wherein
- the controller has a storage unit that stores motor information indicating that the motor is a synchronous motor, and
- when the machine tool stops while a tool exchange process is being carried out in response to one of an input from a stop button or an electric power outage, the controller is configured to use a command for the synchronous motor as a part of a series of commands for moving the spindle to an origin position in order to recover the machine tool during a tool exchange process, the controller is configured to decide to use the command based on the motor information, the tool exchange process being a process in which a tool attached to the spindle is replaced with one of the plurality of tools of the tool magazine.
Dependencies are inferred from the claim text.