Accurate positioning control method for motion system, control system and storage medium

Abstract

The invention relates to an accurate positioning control method for a motion system, a control system and a storage medium, wherein the control method includes searching a stored inertial displacementlist after an operation target value is received, wherein one-to-one corresponding position values and prestored inertial values are recorded in the inertial displacement list; if a position value consistent with a motion target value is not found in the inertial displacement list, acquiring a first current inertial value, and storing and adding the first current inertial value to the inertial displacement list corresponding to the motion target value; and if the position value consistent with the motion target value is found in the inertial displacement list, acquiring a second current inertial value, and updating the prestored inertial value corresponding to the motion target value in the inertial displacement list according to the second current inertial value. According to the method,the inertia value is updated in real time, so that the control of the motor is more accurate, the manual debugging process is omitted, and the operation is simpler and more convenient.

Description

technical field [0001] The invention relates to the technical field of industrial numerical control automation, and more specifically relates to a precise positioning control method of a motion system, a control system and a storage medium. Background technique [0002] The ball screw system is one of the common motion systems. It generally includes a motor, a ball screw, a coupling, an encoder, and a slider. The ball is driven by the motor to rotate, thereby driving the reciprocating sliding of the slider to realize external motion components. The displacement is widely used because of its simple structure and convenient control. [0003] At present, the control of the ball screw system generally adopts manual calculation of the motor movement characteristics of the machine tool. For example, the user needs to use the motor to locate a target position, and then manually execute the operation. When the target position is reached, the motor is stopped, but due to the motor it...

AI Technical Summary

Problems solved by technology

[0003] At present, the control of the ball screw system generally adopts manual calculation of the motor movement characteristics of the machine tool. For example, the user needs to use the motor to locate a target position, and then manually execute the operation. When the target position is reached, the motor is stopped, but due to the motor itself Inertia, the motor will rush out of the set target position. At this time, the user needs to record the distance moved by the motor due to inertia, and then save the moved inertial distance as a system calibration parameter. When the user locates a target position again next time , then the system will start to stop before reaching the target position (that is, the target position minus the distance value of the motor inertia), then due to the inertia of the motor itself, it will rush forward for a certain distance, and it will just reach the user-set value. The target position is reached; but in the actual application process, due to the installation and accuracy of the screw rod, there is a certain error at each point on the screw rod, resulting in that the slider will not be just in place, and the motor needs to be controlled to swing back and forth for positioning. The positioning time is long, and the contactor needs to be jumped back and forth 5-8 times to perform positioning, which is easy to cause damage to the contactor and wear the screw rod

[0004] The above method is cumbersome in the debugging stage, especially as time goes by, factors such as the aging of the motor, the looseness of the screw gap, the load of the screw slider itself, the amount of lubricating oil, etc. will all change, which will directly affect the motor stop. Inertia changes, which leads to the fact that after the user sets the inertia value for the first time, it may be used normally in the first month, but in the second month, the occurrence of the above situations will affect the inertial distance of the motor. The positioning is not accurate and needs to be recalibrated, which causes a lot of trouble for production

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