Spindle compound motion control method and spindle compound motion control system

Abstract

The present application discloses a spindle compound motion control method. The steps include: a host computer simulates the target H-Z sharp knife removal function to generate target motion parameters; the host computer generates a motion control program according to the target motion parameters; The cam controller acquires the motion control program, and adds motor control parameters to the motion control program; the electronic cam controller issues closed-loop control instructions to control the movement of the rotation axis assembly and the rotation axis assembly. The application of the H-Z sharp knife removal function on the translation axis and the rotation axis is realized by the spindle compound motion control method, which realizes the polishing of optical lenses and suppresses the edge effect. The application also discloses a spindle compound motion control system based on the spindle compound motion control method.

Description

technical field [0001] The invention relates to the technical field of optical lens processing, in particular to a control method for compound motion of a spindle. It also relates to a spindle compound motion control system based on the spindle compound motion control method. Background technique [0002] In the processing of optical lenses, the surface of the optical lens is generally processed by the grinding head driven by the spindle of the machining center. The removal distribution and processing rate of the lens material by the grinding head are often described quantitatively by a mathematical function model. This mathematical model is called the removal function. Theoretical models of the removal function are generally based on the Preston linearity assumption. The surface error distribution of the optical lens to be processed is called surface error. The process of optical lens processing is actually the process of using the removal function to convolve the surface...

AI Technical Summary

Problems solved by technology

[0003] When the existing Gaussian-type removal function solves the convergence problem at the edge of the workpiece to be processed, it faces edge effects: on the one hand, when the center of the grinding head is too close to the edge of the workpiece (high protrusion rate), it will cause pressure concentration at the edge, resulting in removal Changes in the function distribution will affect the removal accuracy, and even cause the grinding head to overturn; on the contrary, if the grinding head has a low protrusion rate, the peak value of the removal function will be on the inner side of the workpiece, resulting in significantly lower material removal at the edge of the workpiece, resulting in edge warping

For example, when the grinding head moves to the edge of the optical lens, the peak value of the removal function cannot reach the edge of the lens. At this time, the center of the grinding head is 100mm away from the edge of the lens. Therefore, no matter how to calculate or control the dwell time, considering the flat rotation of the grinding head at the edge of the lens If there is eccentricity, there will always be warping within the range of 90mm due to the removal of peaks that cannot reach the edge, which is the reason for the edge effect to produce "warping". When moving toward the edge of the lens, although the width of the warping area will narrow, the problem of warping still exists, and as the size of the grinding disc protrudes from the edge of the lens increases, the sudden change in the removal function caused by the force change will lead to a local sudden increase in the amount of removal The risk of the increase, there is a sudden "collapse" problem

Therefore, the size of the grinding head protruding from the edge of the lens cannot be increased too much in order to eliminate warping

This causes the edge of the optical lens to not be fully convoluted

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