Mounting Device Rotational Positioning Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing mounting apparatuses face challenges in achieving high accuracy for the positional posture of components due to insufficient rotational positioning accuracy.
Innovation Solution
A mounting apparatus with multiple acquisition sections to detect rotational positions, a correspondence relationship acquisition section, and a rotation control section to derive and adjust target rotation values, ensuring accurate positioning of components by correlating first and second rotation values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an encoder is used to detect the rotational position of the spindle, then the rotational position can be detected, but the positioning accuracy of the component posture is insufficient
Solution Approach 1:
A marker is introduced as an intermediary element attached to the component holding section. The marker serves as a reference object that enables the camera to accurately detect the rotational position of the component holding section. This intermediary marker bridges the gap between the encoder's rotational position detection and the required component posture positioning accuracy, allowing high-precision measurement without modifying the encoder or component holder structure directly
Solution Approach 2:
The patent replaces the purely mechanical encoder-based detection system with an optical detection system using a camera and marker. Instead of relying solely on mechanical encoders attached to the spindle, the system uses optical fields (camera imaging) to detect the position of the marker on the component holding section, thereby achieving higher positioning accuracy through non-contact optical measurement
2Manufacturing precision
If multiple acquisition sections and correspondence relationship acquisition are implemented, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent uses a marker that is imaged by the camera to create a visual copy or representation of the component holding section's rotational position. Instead of adding complex mechanical sensors directly to the component holder, the system creates an optical copy (image) of the position information through the marker, which can then be processed computationally to determine accurate positioning without adding mechanical complexity
Solution Approach 2:
The camera serves multiple functions: it detects the marker's position to determine rotational angle, and can potentially detect component features for orientation verification. The marker serves both as a positional reference and as a feature for rotational orientation detection. This multi-functionality reduces the need for separate dedicated sensors for each measurement task, thereby managing system complexity while achieving high positioning accuracy
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
A CPU of the mounting apparatus acquires correspondence relationship information between a first rotation value Eu and a second rotation value Qu indicating a rotational position of a component holding section by using a first Q-axis encoder 73 and a parts camera. In addition, the first rotation value Eu corresponding to the second rotation value Qu (target value Qu*) is derived as a target rotation value Eu*, by which a component has a target posture Pd*, based on the correspondence relationship information and the second rotation value Qu and a component rotation value Pu obtained in a state in which the component holding section 55 holds the component. The component holding section 55 is rotated such that the first rotation value Eu acquired by the first Q-axis encoder 73 becomes the target rotation value Eu*.