Q-Axis Rotation Timing Control for Component Mounting Efficiency
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Solution Overview
Problem
In component mounting machines, the Q-axis rotation process often results in increased mounting time and reduced production efficiency due to the fixed timing of Q-axis rotation, which can lead to incomplete rotation before imaging, especially when the angle of rotation is great, causing a delay in the imaging process and subsequent mounting.
Innovation Solution
A component mounting device with a control section that compares the required times for movement between the supply position and imaging position and the imaging position and mounting position, starting Q-axis rotation during the longer required time to optimize the timing and complete the rotation before the imaging process, allowing for divided Q-axis rotation into two phases if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If Q-axis rotation is performed at fixed timing regardless of rotation angle, then the control process is simple, but the rotation may not be completed before imaging causing delays
Solution Approach 1:
The patent applies dynamics by making the Q-axis rotation timing flexible rather than fixed. The control section dynamically adjusts the start timing of Q-axis rotation based on the required rotation angle and the time available during movement phases. This allows the rotation to be completed precisely when needed, optimizing both the control process and mounting efficiency.
Solution Approach 2:
The patent changes the parameter of rotation timing from a fixed value to a variable that depends on the rotation angle and movement duration. The control section calculates the appropriate start timing by considering the rotation angle and comparing it with the available time during movement, thereby optimizing the rotation completion timing adaptively.
2Volume of moving object
If the distance between feeder and camera device is reduced to shorten device size, then device size is reduced, but Q-axis rotation may not be completed before imaging
Solution Approach 1:
The patent applies preliminary action by starting the Q-axis rotation before the mounting head reaches the imaging position. The control section calculates the optimal start timing based on the rotation angle and movement duration, ensuring that the rotation is already in progress or completed by the time imaging occurs. This allows for reduced device size while maintaining rotation completion.
Solution Approach 2:
The patent ensures continuity of useful action by overlapping the Q-axis rotation process with the movement process. Instead of completing rotation before movement or waiting for movement to finish before rotating, the system continuously performs both operations in an optimized sequence, maximizing space utilization and maintaining rotation completion within the shortened distance.
3Manufacturing precision
If Q-axis rotation angle is increased to match component angles, then component placement precision is improved, but rotation time increases causing delays
Solution Approach 1:
The patent applies dynamics by adjusting the rotation timing based on the required rotation angle. For larger rotation angles needed for precise component placement, the control section calculates an earlier start timing to ensure completion. This dynamic timing adjustment allows large rotation angles to be performed without causing delays, as the rotation is initiated at the optimal moment during the movement phase.
4Productivity
If Q-axis rotation is performed during imaging movement, then production efficiency is improved, but image blurring occurs reducing detection precision
Solution Approach 1:
The patent applies segmentation by dividing the Q-axis rotation into two phases: a first rotation phase during movement to the imaging position, and a second rotation phase after imaging if additional rotation is needed. This segmentation allows the imaging to occur at a stable moment when the component is properly positioned, ensuring detection precision while still achieving the required rotation for correct component orientation.
Solution Approach 2:
The patent applies preliminary action by performing the necessary Q-axis rotation before the imaging process. The control section ensures that the component is rotated to the correct angle prior to imaging, eliminating image blurring and ensuring detection precision. This preliminary rotation maintains production efficiency by completing the rotation during the movement phase rather than waiting after imaging.
Data Source
AI summary
A component mounting device with which an improvement in production efficiency may be achieved by adjusting the timing of the Q-axis rotation is provided.