Servo control device
First Claim
1. A servo control device that is applied to a numerical control equipment provided with a screw-feeding section that converts rotational movement of a motor to linear movement, a driven section that is linearly moved by the screw-feeding section, and a support member by which the screw-feeding section and the driven section are supported;
- and that is configured to control the motor so as to match a position of the driven section to an instructed position, comprising;
a machine-deflection compensating section, to which the instructed position is input as input information, and which is configured to compensate for positioning-control errors caused by vibrations of the support member, and to output a compensated instructed position; and
a velocity feedforward section, to which the compensated instructed position is input;
wherein the velocity feedforward section includesa support-member-reaction-force compensating section that is configured to compensate for vibrations of the driven section due to vibrational reaction force of the support member, andwherein a differential value of the compensated instructed position, as input information, is input to a transfer function, which is provided in the support-member-reaction-force compensating section and includes coefficients based on an inertia term for the support member, an inertia term for the driven section, a stiffness term for the support member, and a stiffness term for the driven section.
2 Assignments
0 Petitions
Accused Products
Abstract
Improved precision is realized in positioning control. Provided is a servo control device that is applied to a numerical control equipment provided with a screw-feeding section that converts rotational movement of a motor to linear movement, a driven section that is linearly moved by the screw-feeding section, and a support member by which the screw-feeding section and the driven section are supported and that controls the motor so as to match a position of the driven section to a positioning instruction, including a support-member-reaction-force compensating section 311 that compensates for vibrations of the driven section due to a vibrational reaction force of the support member, wherein a transfer function provided in the support-member-reaction-force compensating section 311 includes a stiffness term for the driven section.
46 Citations
14 Claims
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1. A servo control device that is applied to a numerical control equipment provided with a screw-feeding section that converts rotational movement of a motor to linear movement, a driven section that is linearly moved by the screw-feeding section, and a support member by which the screw-feeding section and the driven section are supported;
- and that is configured to control the motor so as to match a position of the driven section to an instructed position, comprising;
a machine-deflection compensating section, to which the instructed position is input as input information, and which is configured to compensate for positioning-control errors caused by vibrations of the support member, and to output a compensated instructed position; and a velocity feedforward section, to which the compensated instructed position is input; wherein the velocity feedforward section includes a support-member-reaction-force compensating section that is configured to compensate for vibrations of the driven section due to vibrational reaction force of the support member, and wherein a differential value of the compensated instructed position, as input information, is input to a transfer function, which is provided in the support-member-reaction-force compensating section and includes coefficients based on an inertia term for the support member, an inertia term for the driven section, a stiffness term for the support member, and a stiffness term for the driven section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- and that is configured to control the motor so as to match a position of the driven section to an instructed position, comprising;
Specification