Conditional Offset Correction in Component Mounting Systems
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Solution Overview
Problem
In component-mounting systems, even small positional deviations of mounted components lead to excessive offset correction processing, causing significant communication time and volume, and increased processing load on control devices, particularly when dealing with large numbers of components.
Innovation Solution
A component-mounting system that includes a print inspection machine, a component mounter, and a board visual inspection machine. The system calculates a correction value based on inspection results and only applies offset corrections when the correction value exceeds a predetermined threshold, thereby reducing unnecessary corrections and associated communication burdens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If offset correction processing is uniformly performed on all components, then manufacturing precision is improved, but communication time and volume increase enormously, causing tact delay
Solution Approach 1:
The patent changes the parameter of correction application from uniform to conditional based on correction value magnitude. When correction values are within a predetermined range, offset correction is not applied; when they exceed the range, correction is applied. This parameter-based conditional processing reduces communication time and volume while maintaining necessary manufacturing precision.
Solution Approach 2:
Instead of applying offset correction to all components (excessive action), the patent applies correction only to components where it is necessary (partial action). By determining correction necessity based on calculated correction values and comparing them against a predetermined range, the system performs partial correction only where needed, reducing overall communication burden while maintaining precision where required.
2Manufacturing precision
If offset correction processing is uniformly performed on all components, then manufacturing precision is improved, but processing load on control device increases
Solution Approach 1:
The patent introduces a parameter-based filtering mechanism where correction values are compared against a predetermined range. This parameter change transforms the control device's operation from processing all correction data to selectively processing only those cases where correction values exceed the threshold, significantly reducing processing load while maintaining precision for critical cases.
Solution Approach 2:
The control device performs partial processing by evaluating correction necessity for each component based on calculated correction values. Instead of uniformly processing all components (excessive action), the device selectively applies correction only when values exceed the predetermined range, reducing overall processing load while maintaining necessary precision.
3Manufacturing precision
If correction is applied to all positional deviations, then manufacturing precision is improved, but unnecessary corrections increase communication volume
Solution Approach 1:
The patent applies a parameter-based filtering approach where correction values are compared against a predetermined range. This parameter threshold mechanism reduces communication volume by transmitting and processing correction data only when necessary, eliminating communication overhead for cases where corrections would be negligible or unnecessary.
Solution Approach 2:
The system performs partial correction by identifying and correcting only those components with correction values exceeding the predetermined range. This partial action approach avoids unnecessary corrections for components within acceptable tolerance ranges, thereby reducing communication volume while maintaining manufacturing precision for critical components.
Data Source
AI summary
A component-mounting system includes a print inspection machine inspects a solder pattern printed on a board; a component mounter mounts a component on the inspected board; and a board visual inspection machine inspects the board with the mounted component. In a case where a correction value calculated using at least one of an inspection result of the print inspection machine and an inspection result of the board visual inspection machine is equal to or greater than a first set value, a control unit mounts the component at a correction mounting position obtained by correcting a mounting position set in advance using the correction value. On the other hand, in a case where the correction value is less than the first set value, the control unit mounts the component at the mounting position without correcting using the correction value.