Nozzle Feedback Control for Variable-Height Component Placement
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Solution Overview
Problem
Existing component placement devices face challenges in precisely picking up and placing components due to varying component thicknesses and substrate irregularities, leading to potential damage from inconsistent forces during component handling, especially when dealing with components of different thicknesses or irregular substrates.
Innovation Solution
The component placement device incorporates a nozzle with a passage connected to a vacuum source and a fluid flow channel that opens or closes upon movement relative to the holder, utilizing detection means to control the holder's movement based on fluid flow changes, ensuring precise component handling regardless of component thickness or substrate height variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the holder is moved a predetermined distance in the main direction, then the component placement process is simple and fast, but the force exerted on the component becomes inconsistent leading to potential damage or insufficient pressing
Solution Approach 1:
The patent implements feedback control by detecting the actual position of the component or substrate and adjusting the holder's movement accordingly. Sensors detect the thickness variations or position deviations, and the control system modifies the movement distance to maintain consistent pressing force, resolving the contradiction between fast placement and reliable component integrity.
Solution Approach 2:
The patent transitions from fixed predetermined movement to dynamic adaptive movement. The holder's movement distance is no longer fixed but dynamically adjusted based on real-time detection of component and substrate characteristics, allowing the system to adapt to variations while maintaining consistent pressing force.
2Object-affected harmful factors
If the nozzle is moved against spring force in a direction opposite to the main direction, then damage to the nozzle and component is prevented, but the force control becomes inconsistent due to varying component thicknesses
Solution Approach 1:
The patent uses feedback control to monitor the actual contact force and position during nozzle movement. By detecting the component thickness and substrate position in real-time, the system adjusts the nozzle movement distance and spring force to maintain consistent pressing force, ensuring both damage prevention and placement precision.
Solution Approach 2:
The patent dynamically changes the parameters of the spring force and nozzle movement distance based on detected component characteristics. By adjusting these parameters in real-time, the system maintains optimal pressing force across varying component thicknesses, resolving the contradiction between damage prevention and placement precision.
3Device complexity
If the component placement device uses fixed movement parameters, then the device structure is simple, but it cannot adapt to varying component thicknesses and substrate irregularities
Solution Approach 1:
The patent introduces feedback control systems with sensors that detect component thickness, substrate position, and pressing force. This feedback enables the system to automatically adapt to variations in components and substrates, providing the necessary versatility while maintaining reasonable device complexity through automated control.
Solution Approach 2:
The patent creates a universal placement system that can handle various component types and substrate conditions through adaptive control. The detection and control systems enable a single device to adapt to multiple scenarios, achieving versatility without proportionally increasing device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for precise and controlled component picking up and placement, minimizing the risk of damage by adjusting the holder's movement based on fluid flow detection, ensuring consistent force application, even with varying component and substrate conditions.
Implementation Method 1
The picking up of the component takes place by means of a nozzle, which is for example connected to a vacuum source for creating a partial vacuum in the nozzle.
Implementation Method 2
a fluid flow channel comprising at least part of the passage, the opening and the channel is being opened or closed by the nozzle at the closable connection upon movement of the nozzle relative to the holder in the direction opposite to the main direction
Data Source
AI summary
A component placement device for picking up a component and placing a component on a substrate device comprises a holder which is movable at least in a main direction, as well as a nozzle for picking up a component. The nozzle is movable at least in a direction opposite the main direction relative to the holder. The component placement device comprises a fluid flow channel which opens or closes upon movement of the nozzle in the direction opposite the main direction relative to the holder, detection means for detecting the opening or closing of the fluid flow channel as well as means for controlling the movement of the holder in at least the main direction on the basis of a signal delivered by the detection means concerning the opening or closing of the fluid flow channel.