Single Microcomputer Controls Servomotors to Reduce Heat
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Solution Overview
Problem
The high cost and heat generation issues in component feeding devices with multiple lanes, driven by servomotors and microcomputers, limit the miniaturization and compactness due to the need for multiple drive circuits and microcomputers.
Innovation Solution
A component feeding device with multiple lanes, where a single microcomputer controls servomotors to advance storage tapes intermittently, with servomotors energized only when necessary, using a delay timer to manage the servo ON and OFF states, reducing heat generation and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple servomotors are used to advance storage tapes in multiple lanes, then component feeding capability is improved, but device cost increases due to multiple microcomputers and drive circuits
Solution Approach 1:
The patent merges the control functions of multiple servomotors into a single microcomputer. The control device integrates the drive circuits and control logic for all servomotors, eliminating the need for separate microcomputers in each lane. This consolidation maintains multi-lane component feeding capability while significantly reducing device cost and complexity.
Solution Approach 2:
The single microcomputer is designed to universally control multiple servomotors across different lanes. The control device performs multiple functions including positioning, speed control, and coordination of all servomotors, replacing what would traditionally require multiple dedicated control units. This multi-functionality approach achieves cost reduction without sacrificing productivity.
2Measurement precision
If servomotors are kept ON (energized) to maintain positioning accuracy, then positioning precision is improved, but heat generation increases limiting miniaturization
Solution Approach 1:
The patent implements periodic action by energizing servomotors only during active component feeding operations rather than continuously. The control device activates servomotors on demand based on feeding requirements, and deactivates them during idle periods. This periodic energization maintains positioning precision when needed while dramatically reducing average heat generation, enabling compact device design.
Solution Approach 2:
The control device dynamically adjusts the energization state of servomotors based on real-time operational needs. Rather than maintaining a static ON state, the system transitions servomotors between ON and OFF states according to positioning requirements and feeding activity. This dynamic control preserves positioning accuracy during operations while minimizing heat generation during idle periods.
Data Source
AI summary
The invention provides a component feeding device where heat generation of a drive circuit is minimized and a printed board mounted with this drive circuit is miniaturized by forming an inexpensive structure using a single microcomputer and by energizing each of the servomotors only when necessary. In a component feeding unit of a dual lane type, a CPU in a microcomputer controls a start of driving of one of servomotors by energizing the servomotor through a drive circuit based on a component feeding signal for one lane outputted from a CPU of an electronic component mounting apparatus, and the CPU in the microcomputer controls one of the servomotors so that the servomotor is not energized when a component feeding signal for another lane is inputted before a predetermine time passes after a delay timer starts timekeeping when receiving a detection signal about rotation of the servomotor by a predetermined amount from an encoder detecting a rotation amount of the servomotor.