Three-Channel Ring Spinning Digital Spinning Machine Control System Development and Application

Literature Overview

This paper by Li Yang, Xue Yuan, Guan Youping, Li Zengrun, and Cheng Zhifang (2020), published in Shanghai Textile Science and Technology (Vol. 48, Issue 2, pp. 14-17), presents the development and application of a control system for a three-channel ring spinning digital spinning machine (JWF1551 model). Funded by the Central Universities Basic Research Business Expenses Special Fund (JUSRP5163A), Jiangsu University Brand Professional Construction Project (PPZY2015B147), and Jiangsu Provincial University Advantageous Discipline Construction Project, the study addresses the control architecture, circuit design, PLC programming, and product capability of a digital spinning machine that enables precise control over yarn linear density, blend ratio, and twist.

Technical Context

Digital spinning machines represent an advancement over conventional ring spinning machines by enabling precise, programmable control of yarn parameters during the spinning process. The three-channel configuration allows simultaneous processing of three different fiber feeds, enabling the production of complex yarn structures including blended yarns, color-variegated yarns, and gradient yarns with precise control over composition and properties.

Control System Architecture

The control system for the JWF1551 three-channel digital spinning machine comprises:

System Components

Component	Function	Specification
Main circuit	Power distribution and motor control	Three-phase AC drive
PLC circuit	Logic control and process sequencing	Programmable Logic Controller
HMI interface	Operator interaction and parameter setting	Touchscreen display
Fiber feed channels	Controlled fiber delivery	3 independent channels
Spinning mechanism	Yarn formation	Ring spinning
Twist control	Twist insertion control	Electronic speed control

PLC Control Program

The PLC program manages:

Fiber feed rate control: Precise control of fiber delivery rate from each channel to achieve target blend ratios
Spinning speed control: Variable speed control of the spindle and flyer to achieve desired twist levels
Yarn take-up control: Synchronized take-up mechanism to maintain constant yarn linear density
Process sequencing: Automated start-up, shutdown, and changeover sequences
Fault detection and response: Monitoring of critical parameters with automatic stop on deviation

Digital Model and Product Capability

Based on the digital model of the three-channel spinning machine, the authors identified the following yarn types that can be produced:

Yarn Type	Linear Density	Blend Ratio	Color Variation	Description
Constant blend yarn	Constant	Constant	Multi-color (5 base colors)	Uniform blended colored yarn
Sectional color yarn	Constant	Sectional variation	Multi-color	Color changes in defined sections
Gradient yarn	Constant	Constant	Progressive	Smooth color transition
Dual gradient yarn	Progressive	Progressive	Multi-color	Simultaneous density and color gradient
Slub yarn	Sectional variation	Constant	Single color	Slub effect with constant color
Sectional slub yarn	Sectional variation	Sectional variation	Multi-color	Slub with color variation

Control Parameter Tuning

The control system must be tuned to achieve precise yarn parameter control:

Linear Density Control

Fiber feed rate proportional to desired linear density
Take-up speed synchronized with spindle speed
Real-time monitoring and feedback correction

Blend Ratio Control

Independent control of each fiber channel feed rate
Calibration of feed mechanism for accurate fiber delivery
Compensation for fiber properties (density, bulk, fineness)

Twist Control

Spindle speed control for twist insertion
Twist factor calculation based on yarn linear density and twist per unit length
Real-time adjustment for yarn quality consistency

Engineering Implementation

The control system implementation requires:

Hardware integration: Proper selection and installation of PLC, sensors, actuators, and HMI
Software development: PLC program development, HMI design, and control algorithm implementation
Calibration: System calibration for accurate fiber feed rate, twist, and linear density control
Operator training: Training on system operation, parameter setting, and troubleshooting
Maintenance planning: Regular maintenance schedule for mechanical and electrical components

Quality Control Considerations

Real-time monitoring of yarn linear density using optical sensors
Blend ratio verification through periodic sampling and analysis
Twist measurement using twist testing instruments
Yarn strength and elongation testing for quality assurance
Color consistency evaluation using color measurement devices

Study Insights

This paper demonstrates the application of digital control technology to traditional ring spinning machinery, enabling the production of complex yarn structures with precise parameter control. The three-channel configuration is particularly advantageous for producing multi-colored and multi-component yarns that would be difficult or impossible to produce with conventional spinning machines.

The digital model approach provides a systematic framework for understanding the relationship between control parameters and yarn properties, enabling rational process design and optimization. The identification of six distinct yarn types demonstrates the versatility of the system.

The integration of PLC control, HMI interface, and digital model represents a modern manufacturing approach that combines automation, flexibility, and quality control. This technology can be extended to other textile processing operations and potentially to other manufacturing processes requiring precise multi-parameter control.

Reference Value

The three-channel digital spinning machine control system provides a practical solution for producing complex yarn structures with high precision and flexibility. The technology is particularly valuable for the production of specialty yarns for fashion, home textiles, and technical applications where precise control over yarn properties is essential. The control system architecture and digital model approach can serve as a reference for developing similar systems for other textile machinery or manufacturing equipment requiring multi-channel, multi-parameter control.