Position control method and position control system for drive feed equipment
AssigneeToshiba Kikai Kabushiki Kaisha
InventorJun Fujita
Life of this patent
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Abstract
When driving a plurality of paralleled feed drive mechanisms individually by servo motors (105, 106), torque of the servo motors (105, 106) is detected, and in dependence on a difference therebetween, a position command of servo motor (106) at a slave side is corrected, so that torque of the slave side servo motor (106) is matched to to torque of servo motor (105) at a master side.
Claims15
A position control method for feed drive equipment for a machine tool in which a plurality of screws are disposed in parallel and side-by-side for feeding a movable body associated with the machine tool, the screws being individually driven by servo motors, the position control method comprising:
- determining torque of the servo motors as they drive the screws, and
- correcting position commands of at least one servo motor in dependence on the determined torque so that the servo motors have matching torque.
A position control system for feed drive equipment for a machine tool in which a plurality of screws are disposed in parallel and side-by-side for feeding a movable body associated with the machine tool, the screws being individually driven by servo motors, the position control system comprising:
- a controller operatively associated with the screws through the servo motors and adapted to determine torque of the servo motors, and adapted to correct position commands of at least one servo motor in dependence on the determined torque so that the servo motors have matching torque.
A feed drive system for a tooling machine, comprising:
- a plurality of feed drive mechanisms disposed in parallel and side-by-side and associated with the tooling machine;
- a movable body associated with the feed drive mechanisms, and adapted to be fed along the feed drive mechanisms;
- servo motors associated with the feed drive mechanisms, and adapted to individually drive the feed drive mechanisms;
- a controller adapted to determine torque of the servo motors, and adapted to correct position commands of at least one servo motor in dependence on the determined torque so that the servo motors have matching torque.
Dependencies are inferred from the claim text.