Encoder Signal Processing for Inkjet Printer Position and Speed Control
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Solution Overview
Problem
Existing encoder-based systems for inkjet printer apparatuses face challenges in achieving accurate position and speed control due to signal distortion, where interpolating encoder signals improves position resolution but deteriorates speed control accuracy.
Innovation Solution
A drive control device and method that generates both non-interpolated and interpolated digital encoder signals, using the non-interpolated signals for speed detection and interpolated signals for position detection to maintain accurate speed and position control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If physical resolution of encoder is improved by reducing slit intervals, then position and speed detection accuracy are improved, but manufacturing cost increases
Solution Approach 1:
The patent changes the processing parameters of the encoder signals rather than the physical parameters of the encoder itself. By applying digital interpolation to the encoder signals, the system achieves high-resolution position detection without needing to physically reduce slit intervals, thereby avoiding increased manufacturing costs while maintaining measurement precision.
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
This approach enables highly accurate position and speed control by minimizing the impact of signal distortion on speed detection, thereby improving overall conveyance accuracy in inkjet printer operations.
Implementation Method 1
at least one light receiving signal inputted from at least one light receiving unit of an encoder
Data Source
AI summary
A drive control device includes a signal generation unit, a position detection unit, a speed detection unit, and a drive control unit. Based on at least one light receiving signal inputted from at least one light receiving unit of an encoder, the signal generation unit digitizes the at least one light receiving signal to generate at least one non-interpolated digital encoder signal, and digitizes and interpolates the at least one light receiving signal to generate at least one interpolated digital encoder signal. The position detection unit detects a position of an object based on the at least one interpolated digital encoder signal. The speed detection unit detects a speed of the object based on the at least one non-interpolated digital encoder signal. The drive control unit performs a drive control of the object based on the above-detected position and speed.