Printer Pulse Motor Control for Smooth Speed Transition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Printers using pulse motors face difficulties in smooth operation when switching between coordination modes with different rotation speeds, leading to potential mismatches in pulse signal input and excitation phase, affecting motor performance.
Innovation Solution
A printer with a controller that manages the pulse/dot ratio by gradually adjusting the pulse/dot ratio when switching between coordinated states, ensuring smooth operation by coordinating the conduction of heating elements and motor driving, maintaining a constant ratio in both fast and slow rotation speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the pulse motor rotation speed is changed significantly when switching between coordination modes, then the printing speed can be adjusted to match feeding speed, but the pulse signal input and excitation phase become mismatched causing motor operation difficulties
Solution Approach 1:
The pulse/dot ratio is made dynamically adjustable rather than fixed, allowing the system to adapt the ratio when switching between coordination modes. This dynamic adjustment prevents pulse signal and excitation phase mismatch while enabling rotation speed changes to match feeding speed with printing speed.
Solution Approach 2:
The invention changes the parameter of pulse/dot ratio from a constant value to a variable parameter that can be adjusted according to the coordination mode. By modifying this parameter during mode transitions, the system maintains proper synchronization between pulse signals and excitation phases while achieving the desired rotation speed adjustments.
2Productivity
If the pulse/dot ratio is kept constant for each coordination mode, then the printing and feeding can be coordinated, but switching between modes with different rotation speeds causes pulse signal and excitation phase mismatch
Solution Approach 1:
The system transitions from static pulse/dot ratio settings to dynamic adjustment during mode switching. This allows the ratio to be modified in real-time when changing coordination modes, maintaining printing-feeding coordination while ensuring smooth transitions without pulse signal or excitation phase mismatch.
Solution Approach 2:
The controller preliminarily adjusts the pulse/dot ratio before completing the mode switch, preparing the motor control parameters in advance to prevent mismatch between pulse signals and excitation phases during the transition between different rotation speeds.
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
The gradual adjustment of pulse/dot ratio during mode switches prevents motor operation difficulties, ensuring consistent printing speed and quality across different rotation speeds, enhancing overall printer performance.
Implementation Method 1
a thermal head having a plurality of heating elements arranged in a direction orthogonal to the transport direction in which the print-receiving medium is fed by the feeder
Data Source
AI summary
The disclosure discloses a printer including a controller. The controller executes a first control, a second control and a switching control. In the first control, it is achieved that a first coordinated state wherein a pulse/dot ratio when a pulse motor rotates at a first rotation speed is set to a first ratio. In the second control, it is achieved that a second coordinated state wherein the pulse/dot ratio when the pulse motor rotates at a second rotation speed is set to a second ratio that is smaller than the first ratio. In the switching control, the pulse/dot ratio is gradually decreased from the first ratio to the second ratio when the first coordinated state is switched to the second coordinated state, and is gradually increased from the second ratio to the first ratio when the second coordinated state is switched to the first coordinated state.