Lingchen Technology LC1500 Series PLC | The Core Engine for "Multi-Axis Synchronous Control" in High-End Sewing Equipment

In numerous industries—including textiles, leather goods, and automotive interiors—sewing equipment remains a fundamental production tool. However, as process complexity increases, the limitations of traditional mechanical cam structures are becoming increasingly apparent: lengthy commissioning cycles, high changeover costs, and difficulties in ensuring precision. Leveraging the LC1500 series PLC as its core controller and integrating it with the Lingchen servo drive system, Lingchen Technology delivers a comprehensive motion control solution for high-end sewing equipment—spanning the entire spectrum from the "control brain" to the "execution units."

Sewing Machine Transmission Structure

In typical high-end sewing equipment, the drive system primarily consists of four components:
Sewing Head: The core reference point for the system's process cycle timing. X1 and X2 Axes: Control the lateral feed of the material being sewn (dual-axis synchronization). Y Axis: Controls the longitudinal feed of the material being sewn.
Key Drive Parameters:
The Y-axis utilizes a configuration comprising a 1:10 reducer, a belt drive, and a lead screw with a 30mm pitch. The main sewing head features a 1:2 speed ratio driven by a synchronous belt. This specific structural design mandates that the control system possess capabilities for high-precision multi-axis synchronization, real-time phase tracking, and complex trajectory planning—precisely the core strengths of the LC1500 series PLC + Lingchen Servo integrated solution.

Process Topology

Utilizing the Lingchen Technology LC1500 series PLC as the main controller, four Lingchen servo drive systems are controlled—via high-speed pulse or fieldbus—to drive the X1, X2, and Y axes, as well as the machine head spindle. This configuration establishes a distinct and cohesive collaborative framework comprising a Master Axis, a Virtual Axis, and Physical Axes:

Physical Axis (Head) — The System Master Axis: This refers to the machine head spindle, driven by a Lingchen servo system. Its rotational angle (phase) serves as the fundamental timing reference for the entire process; all subsequent motions are synchronized relative to this temporal baseline.

Virtual Axis X (Virtual_X) — The Core Intermediary Coordinator: A Virtual Axis X is established internally within the LC1500 PLC. Through electronic cam coupling, it strictly tracks and synchronizes with the phase of the machine head spindle. All complex motion trajectory planning is executed on this Virtual Axis X before being transmitted to the physical axes.

Physical Axes X1 & X2 — X-Direction Motion: The movement along the X-axis is executed by two Lingchen servo-driven axes—X1 and X2. These axes are coupled to the Virtual Axis X via electronic gearing, enabling them to strictly and synchronously execute the motion trajectories planned by the Virtual Axis X (which are themselves correlated with the machine head's phase), thereby ensuring precise lateral material feeding.

Physical Axis Y — Y-Direction Motion: The movement along the Y-axis is executed by a Lingchen servo-driven Y-axis. This axis is coupled directly to the machine head spindle via an electronic cam; its motion profile is defined directly based on the machine head's angle, ensuring that actions such as presser foot lifting and material feeding are perfectly synchronized in time with the needle-stitching operations.

The core value of this architecture lies in transforming complex multi-axis coordinated control into parameterized configuration and debugging, thereby significantly reducing development complexity and enhancing equipment stability.

Parametric Programming

The LC1500 series PLC supports the tabular configuration of sewing parameters:
· Tape Length Setting: Adapts to varying sewing lengths.
· Tape Width Setting: Accommodates any tape width requirement.
· Row Count Setting: Enables automatic planning for multi-row sewing.
Based on these parameters, the control system can automatically generate the sewing trajectory without the need for code rewriting. The program executes the following steps sequentially:
· Dense Stitching
· Left Tape End Stitching
· Right Tape End Stitching
· Intermediate Straight-Line Stitching
The single-cycle curve can be previewed in real-time, making the process debugging workflow both visual and predictable.

Trajectory Planning

The LC1500 Series PLC features a built-in high-speed trajectory planning engine:
· Performs path interpolation calculations in advance within the control system.
· Generates motion commands for each axis, executed with precision by Lingchen servo drives.
· Ensures strict phase synchronization between the X1, X2, and Y axes and the machine head.
· Supports complex curve sewing, meeting the processing requirements for irregularly shaped workpieces.
Electronic cams replace traditional mechanical cams: This not only eliminates mechanical wear and the need for periodic maintenance but also reduces the time required for production changeover and commissioning from "hours" down to "minutes." The high responsiveness of Lingchen servo drives ensures that every single stitch is placed with absolute precision.

Core Performance Advantages

Based on actual production validation, this solution demonstrates outstanding performance across several key metrics:
Performance Parameters
Sewing Speed: 800–1000 stitches/minute, meeting the requirements for medium-to-high-speed sewing operations.
Sewing Width: Adjustable from 90–350 mm, covering the full range of mainstream sewing specifications.
Solution Advantages
① 4-Axis 1ms Scan Cycle: Smoother and More Efficient Motion Control. The LC1500 series PLC supports a high-speed 4-axis 1ms scan cycle, enabling smoother position and velocity planning, faster program execution, and significantly steadier equipment operation.
② Full Electronic Cam Solution: Intuitive and Convenient Commissioning. By utilizing full electronic cams to replace traditional mechanical cams, the commissioning process becomes significantly more intuitive and convenient. When faced with variations in sewing width, length, or material type, engineers can rapidly adjust parameters, thereby drastically shortening the overall commissioning cycle.
③ Trajectory Path Planning + Phase Adjustment: Flexible Pattern Adaptation. The system supports trajectory path planning and flexible phase adjustment, allowing users to freely fine-tune stitch patterns based on the specific sewing characteristics of different materials, thereby ensuring optimal sewing results on any fabric type.

Summarize

With over two decades of deep expertise in industrial automation, Lingchen Technology remains steadfast in its commitment to driving industry transformation through technological innovation. In the realm of high-end sewing equipment, our LC1500 series solution transforms complex multi-axis synchronous control into a user-friendly, parameterized, and visualized experience—liberating equipment manufacturers from the arduous task of mechanical cam debugging while enabling end-users to enjoy the exceptional value of high efficiency and precision. Moving forward, Lingchen Technology will continue to deepen its focus on motion control technology, leveraging a more comprehensive product ecosystem to empower a wider range of industries—including textiles, 3C electronics, semiconductors, and new energy—and to grow alongside China's intelligent manufacturing sector.

About Us

Established in 2006, Suzhou Lingchen Data Acquisition & Computer Co., Ltd. operates under a business philosophy centered on creating value for clients and fostering win-win partnerships. The company provides customers with core components and system solutions for a wide range of automation equipment, including industrial computers, motion control systems, test and measurement instruments, machine vision systems, and robotics. Currently, Lingchen oversees two wholly-owned subsidiaries: Suzhou Xun'ya Automation Technology Co., Ltd. and T.O.K. Robotics (Suzhou) Co., Ltd., which specialize in the sales of robotic systems and the R&D, manufacturing, and sales of linear motion products, respectively.

Product System Network

Within the hierarchical structure of automated control networks, Lingchen Technology offers a comprehensive range of products spanning the device, control, and information layers.

01  Industrial Computers

Lingchen Industrial Chassis provides comprehensive physical protection for critical computing cores through its industrial-grade robust structure, exceptional thermal management, and dust-proof design, ensuring enduring and stable operation even in harsh industrial environments characterized by vibration, dust, and extreme temperatures.

02 Embedded Industrial PC

Lingchen Embedded Industrial PCs feature a compact and rugged industrial design, integrating high-performance computing, extensive I/O interfaces, and broad tolerance for wide temperature and voltage ranges. Specifically engineered for embedded applications—such as machine vision, edge computing, and automation equipment—these systems provide a stable and reliable intelligent core within limited spaces, empowering smart manufacturing and IoT applications.

03 Motion Control Card

The Lingchen motion control card is capable of controlling up to 32 motion axes and simultaneously supports the control of up to 512 DI points and 512 DO points, with a maximum bus communication cycle of 250 µs. In terms of motion control, it supports functions such as single-axis relative motion, absolute motion, jogging, and drive-based homing; multi-axis interpolation; multi-axis point table motion; and electronic gearing.

04 LMC Series Motion Controllers

The Lingchen LMC series motion controllers are designed around an open, hard real-time kernel (with jitter < ±0.3 µs). This design thoroughly resolves the non-real-time limitations inherent in traditional Windows-based platforms, ensuring both determinism and instantaneous response for multi-axis commands. Installation is remarkably simple, requiring only a single Ethernet cable for connection; furthermore, utilizing highly efficient asynchronous communication technology, the system enables the synchronized issuance and control of motion commands for up to 12 axes within just 1 millisecond.

05 NAC Series High-Performance Motion Controllers

At the core of the Lingchen NAC controller lies a powerful bus expansion capability, supporting four EtherCAT masters to enable the precise control of 256 axes per station—totaling 4,096 I/O channels. Its motion control capabilities are both comprehensive and robust: beyond standard point-to-point, linear, and circular interpolation, it features advanced functions such as 5-axis interpolation, spline-based trajectory smoothing, and dynamic coordinate systems. Furthermore, it integrates vibration suppression, "soft landing" capabilities, and high-precision position comparison outputs; combined with eight independent interpolation groups and continuous interpolation functionality, it effectively meets the demands of complex trajectories and high-speed synchronization. The development environment is open and flexible, supporting multiple programming languages—including C++, C#, and Python—and allows for direct programming within the real-time operating system, thereby significantly enhancing integration and debugging efficiency.

06 PLC Motion Controller

Lingchen PLC controllers strictly adhere to PLCopen specifications and the IEC 61131-3 international standard, combining high performance, a compact footprint, and a modular design to facilitate easy development and flexible deployment. Widely applicable to automation equipment and production line systems across sectors such as 3C electronics, lithium-ion batteries, packaging, and printing, these controllers can also be extended to serve as network communication nodes within integrated production lines for logistics, automotive, and consumer goods industries. By meeting requirements for internal/external network isolation, high-speed bus communication, and real-time data processing, they provide a stable and reliable control core for a diverse range of industrial environments.

07 Industrial Network Cards

Lingchen industrial network cards are specifically engineered for harsh industrial environments, featuring 10/100/1000Mbps auto-negotiation capabilities to deliver stable and reliable high-speed network connectivity. Characterized by robust anti-interference, surge protection, and wide-temperature operation, these cards are widely deployed in critical applications such as motion control, machine vision, and automation systems. The products feature a flexible installation design—including a standard full-height bracket and an optional half-height bracket—enabling seamless integration into a wide range of smart manufacturing equipment and industrial networks.

08 IO Module

Lingchen Technology offers a comprehensive range of I/O module solutions, designed to meet the diverse requirements of industrial automation flexibly.

LC/LD Series Expandable I/O Modules: Supporting multiple protocols—including EtherCAT, Profinet, Ethernet/IP, and Modbus TCP—these modules allow for the flexible expansion of data acquisition capabilities covering digital signals, analog signals, temperature, pressure, and pulses. They are widely applied across sectors such as 3C electronics, lithium-ion batteries, semiconductors, automotive manufacturing, and medical equipment.

MINI Series I/O Modules: Characterized by their compact size and high real-time performance, this series encompasses digital I/O, analog I/O, temperature modules, and communication modules. They are ideally suited for control and data acquisition scenarios where space constraints and real-time responsiveness are critical requirements.

GWS Series Cabinet-Free I/O Modules: Featuring exceptional stability and convenient network cabling capabilities, these modules are designed for distributed system layouts, enabling significant reductions in both system integration time and costs.

Our entire product portfolio is dedicated to providing users with reliable, easy-to-integrate, and adaptable I/O module support for a wide variety of application scenarios.