Component Mounting Position Offset Control for SMT Precision
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Solution Overview
Problem
In surface mount technology, determining the accurate mounting position of components on substrates is challenging due to variations in component positioning, which can lead to defects if not properly aligned with pads, causing issues during the reflow process.
Innovation Solution
An apparatus that communicates with a component mounting device and an optical measurement device to acquire position offsets, set a range of normal states, generate control signals to adjust mounting parameters, and transmit these signals to ensure optimal component positioning, thereby minimizing defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If component mounting position is determined without real-time adjustment, then the manufacturing process is simple, but the mounting precision deteriorates due to variations in component positioning
Solution Approach 1:
The system performs preliminary measurement of component positions and substrate pad positions before mounting, calculates position offsets in advance, and determines adjustment parameters beforehand. This preliminary action enables accurate mounting without requiring complex real-time adjustment mechanisms during the actual mounting process.
Solution Approach 2:
The system measures actual component and substrate positions, compares them with target positions to calculate position offsets, and uses this feedback information to determine adjustment parameters for the mounting device. This closed-loop feedback mechanism improves mounting precision while keeping the system relatively simple.
2Manufacturing precision
If component mounting position is adjusted in real-time based on measurements, then the mounting precision improves, but the productivity deteriorates due to additional measurement and calculation steps
Solution Approach 1:
The system performs measurements and calculations before the mounting process to determine adjustment parameters in advance. By completing all analysis work beforehand, the actual mounting process can proceed quickly without real-time computation delays, thus maintaining high productivity while achieving high precision.
Solution Approach 2:
The system dynamically adjusts mounting parameters based on measured position offsets, but performs this adjustment preparation in advance. The mounting device itself remains relatively simple while the control system dynamically determines optimal parameters before execution, balancing precision and speed.
3Measurement precision
If the range of normal state is set based on historical data, then the control accuracy improves, but the adaptability deteriorates when mounting conditions change
Solution Approach 1:
The system dynamically determines the range of normal state based on actual measured position offsets from the substrate and component data. Instead of using fixed historical ranges, the system adapts the normal state range to current mounting conditions, maintaining both measurement accuracy and adaptability to changing conditions.
Solution Approach 2:
The system changes the parameters defining the normal state range based on measured position variations. By adjusting the normal state range parameters according to actual mounting conditions and observed position offsets, the system maintains accurate measurement evaluation while adapting to different mounting scenarios.
Data Source
AI summary
The apparatus according to various embodiments includes one or more processors, and one or more memories operatively connected to the one or more processors. The one or more memories may store instructions that, when executed, cause the one or more processors to acquire a plurality of first position offsets of a plurality of first components respectively mounted on a plurality of first substrates with respect to a plurality of pads of the plurality of first substrates corresponding to the plurality of first components from the optical measurement device, set a range of a normal state for a component position offset based on the plurality of first position offsets, generate a control signal for adjusting at least one control parameter of the component mounting device associated with a component mounting position based on the range of the normal state, and transmit the control signal to the component mounting device.