Dual-Motor Carriage Control for High-Speed Accurate Printing
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Solution Overview
Problem
The challenge of driving a carriage with a high-output printhead at high speed and with accuracy is complicated by the need for different motor types, leading to complex control methods and reduced control responsiveness and stability.
Innovation Solution
A carriage apparatus with two motors of the same kind of driving characteristics, positioned at both ends, and a unified control system using a common detection means and control means for feedback, simplifying the control method and enhancing stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a large motor with high output is arranged at one end to drive the carriage, then the carriage can be driven at high speed and with accuracy, but the cost of the motor greatly increases
Solution Approach 1:
The patent divides the carriage driving function into two separate motors positioned at opposite ends of the carriage. Each motor provides partial driving force, and together they achieve the required high-speed and high-accuracy carriage movement without needing a single large high-output motor, thereby reducing individual motor costs while maintaining overall system performance.
2Speed
If different types of motors (DC motor and stepper motor) are used at both ends to drive the carriage, then the carriage can be driven at high speed and with accuracy, but the control method becomes complicated and control responsiveness and stability deteriorate
Solution Approach 1:
The patent employs two motors of the same type and with identical driving characteristics at both ends of the carriage. This homogeneity allows both motors to be controlled using the same control commands and parameters, significantly simplifying the control system architecture. The unified control approach eliminates the need for separate control strategies for different motor types, thereby improving control responsiveness and stability while maintaining high-speed accurate carriage driving capability.
3Speed
If different types of motors are used to drive the carriage, then the carriage can be driven at high speed and with accuracy, but control stability deteriorates
Solution Approach 1:
The patent employs two motors of the same type and with identical driving characteristics at both ends of the carriage. This homogeneity allows both motors to be controlled using the same control commands and parameters, significantly simplifying the control system architecture. The unified control approach eliminates the need for separate control strategies for different motor types, thereby improving control responsiveness and stability while maintaining high-speed accurate carriage driving capability.
Data Source
AI summary
A carriage apparatus includes a carriage configured to reciprocally move in a predetermined direction, a first motor arranged on a side of one end of a range of movement of the carriage and configured to drive the carriage, a second motor arranged on a side of the other end of the range of movement of the carriage, configured to drive the carriage, and having the same kind of driving characteristics as driving characteristics of the first motor, a detector for detecting a position of the carriage related to the predetermined direction, and a controller for controlling driving of the first motor and the second motor by feeding back a detection result detected by the detector.