Motor Control Device Scheduling for Sheet Conveyance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional motor control systems experience time lag due to the division of control between master and slave units, leading to delays in motor operation, especially when conveying sheets with narrow intervals in image forming apparatuses.
Innovation Solution
A motor control device with a first control unit that issues scheduling commands and a second control unit capable of detecting motor states, determining operations, and executing them independently, reducing the need for communication and processing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If motor control is divided between master control unit and slave control unit, then device complexity is reduced and cost is lowered, but time lag occurs in motor operation
Solution Approach 1:
The master control unit issues a command in advance that schedules the next motor operation. The slave control unit receives this scheduled command and executes it when the motor reaches the predetermined state, eliminating the need to wait for real-time state confirmation from the master control unit.
Solution Approach 2:
The control functions are segmented between master and slave control units. The master control unit handles high-level scheduling and command issuance, while the slave control unit handles real-time motor state detection and execution, allowing each unit to operate independently in its specialized domain.
2Productivity
If master control unit schedules next motor operation, then productivity is improved, but time lag increases due to communication overhead
Solution Approach 1:
The master control unit proactively issues a scheduled command before the motor completes its current operation. This preliminary scheduling allows the slave control unit to prepare for execution without waiting for continuous communication during motor operation, reducing communication delay impact.
Solution Approach 2:
The slave control unit autonomously monitors motor state through its own detecting unit and independently determines when to execute the scheduled command, without requiring continuous verification or approval from the master control unit. This self-service approach eliminates communication overhead during critical execution phases.
Data Source
AI summary
A motor control device includes a first control unit and a second control unit. The first control unit includes an issuing unit that issues a command that schedules a next operation of a motor according to an instruction from a controller. The second control unit includes a receiving unit that receives the command, a detecting unit that detects a state of the motor, a determining unit that makes a determination as to whether to drive the motor to perform the operation according to the state detected by the detecting unit, and an executing unit that drives the motor to perform the operation scheduled by the command as determined by the determination.