Cutting apparatus and contact position specifying program

A cutting apparatus comprising:

• a rotation that rotates a spindle to which a cutting tool or to-be-cut object is attached;
• a feed drive motor that moves the cutting tool relative to the to-be-cut object;
• and
• a controller that is programmed to control rotation of the spindle by the rotation drive motor and relative movement of the cutting tool by the feed drive motor, wherein
• the controller is programmed to control a capability of using detection information of a contact sensor or time-series data of a detection value related to the rotation drive motor and/or the feed drive motor to acquire a coordinate value when a cutting edge of the cutting tool comes into contact with the to-be-cut object, and
• the controller is programmed to specify, based on coordinate values when the cutting tool is moved relative to the to-be-cut object subjected to cutting work by a feed capability of the feed drive motor in a movement direction not used for the cutting work to bring a cutting edge of the cutting tool into contact with the to-be-cut object at least at two positions, at least one of an attachment error of the cutting tool, an error in shape of the cutting edge of the cutting tool, and a deviation in the movement direction of the cutting tool relative to the to-be-cut object.

A cutting apparatus comprising:

• a rotation drive motor that rotates a spindle to which a cutting tool or to-be-cut object is attached;
• a feed drive motor that moves the cutting tool relative to the to-be-cut object;
• a controller;
• and
• a storage medium storing a program, wherein
• when the program is executed, the program causes the controller to be configured to:
• specify a contact position between the cutting tool and the to-be-cut object from time-series data of a detection value related to the rotation drive motor and/or the feed drive motor, and
• derive a contact timing before the detection value reaches a predetermined threshold, specify the contact position from the contact timing derived, based on first time-series data of a detection value acquired before contact, and change in second time-series data of a detection value acquired after contact, the second time-series data containing a detection value greater than & the predetermined threshold.

A cutting apparatus comprising:

• a rotation drive motor that rotates a spindle to which a cutting tool or to-be-cut object is attached;
• a feed drive motor that moves the cutting tool relative to the to-be-cut object;
• a controller that is programmed to specify a contact position between the cutting tool and the to-be-cut object from time-series data of a detection value related to the rotation drive motor and/or the feed drive motors;
• a controller;
• and
• a storage medium storing a program, wherein
• when the program is executed, the program causes the control to be configured to:
• set a threshold for specifying a state of contact between the cutting tool and the to-be-cut object by using first time-series data of a detection value acquired before contact, and specify second time-series data containing a detection value greater than the threshold, and
• specify the contact position based on an average value of the first time-series data and a regression equation obtained by regression analysis of the second time-series data.

A non-transitory computer-readable recording medium storing a computer program causing a computer to be configured to:

• specify, from time-series data of a detection value related to a rotation drive motor that rotates a spindle to which a cutting tool or to-be-cut object is attached and/or a feed drive motor that moves the cutting tool relative to the to-be-cut object, first time-series data of a detection value acquired before contact and second time-series data of a detection value acquired after contact, the second time-series data containing a detection value greater than a predetermined threshold;
• specify a contact timing before the detection value reaches the predetermined threshold based on the first time-series data and changes in the second time-series data;
• and
• specify a contact position between the cutting tool and the to-be-cut object based on the contact timing derived.

A non-transitory computer-readable recording medium storing a computer program causing a computer to be configured to:

• specify, from time-series data of a detection value related to a rotation drive motor that rotates a spindle to which a cutting tool or to-be-cut object is attached and/or a feed drive motor that moves the cutting tool relative to the to-be-cut object, first time-series data of a detection value acquired before contact;
• set a threshold for specifying a state of contact between the cutting tool and the to-be-cut object by using the first time-series data,
• specify second time-series data containing a detection value greater than the predetermined threshold from the time-series data of a detection value related to the rotation drive motor and/or the feed drive motor;
• and
• specify a contact position between the cutting tool and the to-be-cut object based on an average value of the first time-series data and a regression equation obtained by regression analysis of the second time-series data.