Printer Transport Motor State Control for Low-Power Sheet Cutting
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Solution Overview
Problem
Existing printers consume excessive power due to continuous motor energization when detecting and cutting recording media, necessitating the inclusion of detection means.
Innovation Solution
A printing apparatus with a transport unit, motor, driving circuit, and control unit that puts the transport motor into a hold state during cutting and a short brake state after cutting, reducing power consumption and preventing sheet deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motor is continuously energized when a recording medium is detected, then the recording medium can be reliably held and cut, but power consumption increases
Solution Approach 1:
The patent applies dynamics by transitioning the motor through three distinct operational states (hold state during cutting, acceleration state before cutting, and short brake state after cutting) based on the cutting process stage. This dynamic state management allows the motor to provide necessary torque only when required while minimizing power consumption during transition and holding phases, resolving the contradiction between reliable recording medium holding and power consumption reduction.
Solution Approach 2:
The patent changes motor operational parameters (current, voltage, rotation speed) according to the cutting process stage. By adjusting these parameters dynamically - using hold current during cutting, acceleration current before cutting, and short brake current after cutting - the system achieves reliable recording medium control while optimizing power consumption, directly addressing the technical contradiction.
2Use of energy by moving object
If the motor is stopped completely, then power consumption is reduced, but the recording sheet may deviate or be affected by external forces
Solution Approach 1:
The patent uses dynamic state transitions to maintain recording sheet stability only when necessary. The motor remains in hold state during cutting to prevent deviation, transitions to acceleration state before cutting to maintain positioning, and enters short brake state after cutting to prevent external force effects. This dynamic approach ensures stability during critical phases while allowing complete stop during safe phases, resolving the contradiction between power consumption and position stability.
Solution Approach 2:
The patent implements periodic motor activation synchronized with the cutting process. The motor is activated in hold state during cutting, accelerated before cutting, and braked after cutting, creating a periodic action pattern that maintains stability only during necessary time windows. This periodic operation reduces overall power consumption while ensuring recording sheet stability during critical operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces power consumption and prevents sheet deviation during cutting, maintaining printing quality and eliminating the need for continuous detection means.
Implementation Method 1
a driving circuit that drives the transport motor
Implementation Method 2
puts the transport motor into a short brake state by the driving circuit after the recording sheet is cut by the cutter
Data Source
AI summary
A printing apparatus includes a transport unit including a roller that transports a recording sheet in a transport direction, a transport motor that rotates the roller, and a driving circuit that drives the transport motor, a head that performs printing on the recording sheet, a cutter that cuts the recording sheet, and a control unit. The control unit puts the transport motor into a hold state by the driving circuit when the recording sheet is cut by the cutter, and puts the transport motor into a short brake state by the driving circuit after the recording sheet is cut by the cutter.