Controller

A controller of a machining tool which has detection means for detecting the position and/or speed of a driven body and controls the position and/or speed of the driven body, comprising:

• acceleration detection means for detecting the acceleration of the driven body;
• an evaluation processing unit for conducting prescribed calculations for evaluating the vibration state of the driven body during acceleration or deceleration and within the preset time interval after the end of the acceleration or deceleration on the basis of the acceleration detected by the acceleration detection means;
• and
• change means for decreasing the variation ratio of a speed command to the driven body based on the evaluation value calculated by the evaluation processing unit.

A controller of a machining tool for controlling the position and/or speed of a driven body, comprising:

• detection means for detecting the position and/or speed of the driven body;
• acceleration detection means for detecting the acceleration of the driven body;
• an evaluation processing unit for conducting prescribed calculations for evaluating the vibration state of the driven body during a prescribed time interval that is set in advance from an acceleration or deceleration start;
• and
• change for decreasing the variation ratio of a speed command to the driven body based on the evaluation value calculated by the evaluation processing unit.

A controller of a machining tool for controlling the position and/or speed of a driven body, comprising:

• position/speed detection means for detecting the position and/or speed of the driven body;
• acceleration detection means for detecting the acceleration of the driven body;
• and
• acceleration estimation means for obtaining an acceleration estimation value based on the detection value from the position/speed detection means, wherein
• acceleration value estimated by the acceleration estimation means and the detected value of acceleration obtained from the acceleration detection means are compared with each other and, when the absolute value of the difference therebetween is equal to or larger than a preset threshold, the speed command or variation ratio of the speed command to the driven body is decreased.

A controller of a machining tool for controlling the position and/or speed of a driven body, comprising:

• detection means for detecting the position and/or speed of the driven body;
• acceleration detection means for detecting the acceleration of the driven body;
• and
• change means for decreasing the variation ratio of a speed command to the driven body when the detected value of acceleration detected by the acceleration detection means becomes equal to or greater than a preset threshold during a prescribed time interval that is set in advance from an acceleration or deceleration start.

A controller of a machining tool for controlling the position and/or speed of a driven body, comprising:

• detection means for detecting the position and/or speed of the driven body;
• acceleration detection means for detecting the acceleration of the driven body;
• an evaluation processing unit for conducting prescribed calculations for evaluating the vibration state of the driven body during acceleration or deceleration and within the preset time interval after the end of the acceleration or deceleration;
• and
• change means for decreasing a speed command to the driven body.