Adaptive Mounting Head Offset Control for Temperature Drift
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Solution Overview
Problem
The existing electronic component mounting methods struggle to maintain accurate positioning due to temperature-induced deviations in the mounting head's rotation center, leading to unstable mounting accuracy without increasing the frequency of offset value instructions, which negatively impacts production efficiency.
Innovation Solution
Implement a method where the offset value for the mounting head's rotation center is determined and stored at intervals based on a mid-operation instruction action mode, with longer intervals used when the required accuracy is consistently met, and shorter intervals when accuracy is not met, to adapt to temperature changes without excessive re-calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the frequency of offset value instructions is increased to maintain mounting accuracy, then mounting accuracy is improved, but production time increases and productivity deteriorates
Solution Approach 1:
The patent applies dynamics by making the instruction interval adaptive rather than fixed. The system dynamically adjusts the offset value instruction frequency based on real-time temperature monitoring and mounting accuracy results. When temperature changes are small and accuracy is maintained, instruction intervals are extended. When temperature changes significantly or accuracy degrades, intervals are shortened. This dynamic adjustment resolves the contradiction between maintaining high mounting accuracy and preserving productivity.
Solution Approach 2:
The patent implements feedback mechanisms where mounting accuracy results and temperature data are continuously monitored and fed back to the control system. This feedback loop enables the system to automatically adjust the offset value instruction timing. When feedback indicates that accuracy is maintained, the system reduces instruction frequency to maintain productivity. When feedback shows accuracy degradation, the system increases instruction frequency to restore precision, thus resolving the contradiction.
2Productivity
If the frequency of offset value instructions is decreased to maintain productivity, then production time is reduced and productivity is improved, but mounting accuracy deteriorates due to temperature changes
Solution Approach 1:
The system dynamically adjusts instruction frequency based on actual operating conditions rather than using a fixed schedule. By monitoring temperature changes and mounting results in real-time, the system extends instruction intervals during stable conditions to maintain productivity while ensuring instructions are executed when temperature drift affects accuracy, thus resolving the contradiction between productivity and precision.
Solution Approach 2:
The patent changes the parameter of instruction interval from a fixed value to a variable parameter that adapts to temperature conditions and mounting accuracy results. This parameter change allows the system to optimize the balance between productivity and mounting accuracy by adjusting the timing of offset value instructions based on actual operational needs rather than following a rigid schedule.
3Productivity
If a single fixed offset value is used to simplify the process, then the number of instructions is reduced and productivity is improved, but the ability to cope with temperature changes is lost and mounting accuracy becomes unstable
Solution Approach 1:
The patent replaces the static single offset value approach with a dynamic multi-value system. Instead of using one fixed offset value throughout production, the system maintains multiple offset values corresponding to different temperature conditions and selects the appropriate value based on real-time temperature monitoring. This dynamic approach maintains productivity by avoiding excessive instructions while ensuring mounting accuracy stability through adaptive selection of offset values.
Solution Approach 2:
The system performs preliminary actions by pre-calculating and storing multiple offset values corresponding to different temperature conditions before actual mounting operations begin. This preliminary preparation allows the system to quickly switch between offset values based on temperature changes without requiring time-consuming recalculation during production, thus maintaining both productivity and mounting accuracy stability.
Data Source
AI summary
A method for mounting an electronic component onto a circuit board. The method may include preparing a mounting device including a rotatable mounting head, a holding means to hold the electronic component, a component recognition camera, a memory device, and a microcomputer, the electronic component being mounted onto the circuit board based on a result of performing recognition processing with respect to an acquired image, determining a mid-operation instruction action mode at start of a production operation, executing an instruction of obtaining an offset value relative to a rotation center of the rotatable mounting head and storing the offset value in the memory device at a time interval according to the determined mid-operation instruction action mode, and executing the instruction at a longer time interval when the instruction has continuously met a required accuracy more than once.