Marker Components for Carrier Placement Accuracy
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Solution Overview
Problem
Large-format carriers used in back-end manufacturing exceed the placement area of typical placement machines, making it difficult to achieve high positional accuracy due to the need for clocked placement and inadequate optical positional markers.
Innovation Solution
A method involving the placement of marker components in an overlap area on the carrier, allowing for optical detection by a camera to establish a coordinate reference system, enabling accurate placement across multiple sections of the carrier, with the carrier being moved between spatial locations within the placement machine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If clocked placement is used for carriers larger than the placement area, then the carrier can be equipped across multiple sections, but the placement accuracy deteriorates due to the need to detach and reposition the carrier
Solution Approach 1:
The patent replaces the mechanical positioning system with an optical measurement and compensation system. Instead of relying solely on mechanical precision when detaching and repositioning the carrier, the invention uses optical markers and camera-based measurement to detect carrier position and deformation, then compensates for these variations through coordinate transformation and calculation, thereby maintaining high placement accuracy despite mechanical repositioning
Solution Approach 2:
The patent implements a feedback mechanism where the carrier's position and deformation are continuously measured using optical markers and cameras during the clocked placement process. This measurement data is fed back to the control system, which calculates the necessary coordinate transformations to compensate for position variations, ensuring that placement accuracy is maintained across multiple carrier sections
2Manufacturing precision
If optical markers are used for position detection, then placement accuracy can be maintained, but the markers are inadequate or missing on large-format carriers
Solution Approach 1:
The patent applies preliminary action by pre-defining the theoretical positions of optical markers on the carrier before the placement process begins. These marker positions are calculated based on the carrier's design specifications, and the system uses these pre-calculated positions to establish the initial coordinate system and perform subsequent position measurements and compensations
Solution Approach 2:
The patent introduces optical markers as intermediary elements that facilitate the measurement and detection of carrier position. These markers serve as reference points that the camera system can detect to determine the carrier's actual position and deformation, enabling the system to calculate and compensate for position variations without requiring direct measurement of component positions
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 method improves placement accuracy and efficiency by allowing for precise positioning of components across the entire carrier, even those exceeding the machine's placement area, by using marker components as a reference system for coordinate alignment.
Implementation Method 1
a second optical detection by means of the camera of the marker components placed in the overlap area
Data Source
AI summary
A method and a placement machine for equipping a carrier with components. The procedure includes: (a) positioning of the carrier in a first spatial location within the placement machine, such that components in a first section of the carrier are placeable by a placement head of the placement machine; (b) placement, by means of the placement head, of a multitude of marker components on the carrier in an overlap area of the carrier; (c) transferring of the carrier along a transport direction into a second spatial location within the placement machine, the second spatial location being selected such that components in a second section of the carrier are placeable by the placement head and that the marker components placed in the overlap area are optically detectable by a camera; (d) second optical detection by means of the camera of the marker components placed in the overlap area; and (e) placement of a multitude of components on the carrier in predefined placement positions within the second section, the spatial locations of the placement positions on the carrier depending at least on the result of the second optical detection of the placed marker components.