TOUPACK Inside the Brain of an Intelligent Multihead Weigher Control Systems Explained

Explore the differences between TIANJI, TIANPING and TIANZUN control systems in intelligent multihead weighers. Learn about MCU vs PLC control, SCR and SPWM vibration drive technology, system architecture, and how to choose the best multihead weigher for your production line.

Introduction: Why the Control System Matters in a Multihead Weigher

In an intelligent multihead weigher, the control system acts as the “brain” of the machine. It determines weighing speed, accuracy, stability, vibration feeding efficiency, and overall production reliability.

To meet different application and budget requirements, our intelligent multihead weigher offers three control system modalities: TIANJI, TIANPING, and TIANZUN.

All three systems are based on MCU (Microcontroller Unit) architecture and can also be upgraded to PLC (Programmable Logic Controller) for customers who require higher industrial reliability, automation integration, and long-term continuous operation.

MCU vs PLC Control in Multihead Weigher Systems

By default, TIANJI, TIANPING, and TIANZUN use MCU-based control systems, offering:

• Fast response speed

• High integration and compact structure

• Cost-effective hardware configuration

• Flexible customization for different applications

For high-end production lines or fully automated factories, the MCU can be replaced by a PLC industrial controller, providing:

• Strong anti-interference capability

• Higher stability for 24/7 operation

• Easy integration with MES, SCADA, and packaging lines

• Standardized industrial communication protocols

This flexible architecture allows customers to select the most suitable control platform for their multihead weighing solution.

Modular Control Architecture of the Intelligent Multihead Weigher

The system adopts a modular distributed control structure, including:

• Main Control Board

• Hopper CPU Backplane

• Stepper Motor Drive Backplane (Hopper Door Control)

• Linear Vibrator Drive Backplane

How It Works

The main control board manages overall logic and data processing.
Multiple hopper CPU boards are inserted into the hopper CPU backplane, and each CPU board independently controls one weighing head, including:

• AD module for weight signal acquisition

• Hopper door stepper motor drive

• Linear vibrator feeding drive

All hopper CPU boards, stepper motor drive boards, and linear vibrator drive boards are connected through their respective backplanes, making the system easy to maintain, expand, and service.

In standard systems, the vibration feeding system is driven by SCR (Silicon Controlled Rectifier) at the power supply frequency, ensuring stable and mature operation.

TIANPING Control System – Cost-Effective and Stable Solution

The TIANPING system adopts a simplified structure consisting of:

• Main control board

• Sub-hopper control baseboard

Each hopper control baseboard is plugged with hopper control boards for all weighing heads. Each board directly connects to:

• AD module

• Hopper door stepper motor

• Linear vibrator drive

The vibration feeding system uses SCR power-frequency control, offering stable performance with reduced hardware complexity.

Key Advantages of TIANPING:

• Lower system cost compared with high-end systems

• Simple structure and easy maintenance

• Stable performance for most granular and snack products

• Ideal for nuts, puffed food, candies, dried fruits, and mixed products

This makes TIANPING an excellent choice for customers seeking a high cost-performance ratio in their multihead weigher.

TIANZUN Control System – Advanced SPWM Vibration Technology

The TIANZUN system has a similar structural layout to TIANPING but introduces a major technology upgrade.

Instead of SCR power-frequency control, TIANZUN adopts SPWM (Sinusoidal Pulse Width Modulation) technology to drive the vibration feeding system.

Advantages of SPWM Control:

• Adjustable vibration frequency based on material characteristics

• Optimized feeding efficiency and smoother material flow

• Better control for sticky, fragile, lightweight, or irregular products

• Higher combination efficiency and weighing accuracy

• Reduced mechanical impact and operating noise

By dynamically modulating vibration frequency, the material conveying process always stays in the optimal working state, making TIANZUN ideal for high-speed and high-precision multihead weighing applications.

Conclusion

Whether you need a cost-effective multihead weigher for snack production or a high-performance system for demanding applications, TIANJI, TIANPING, and TIANZUN provide flexible and scalable control solutions. With MCU or PLC options, modular architecture, and advanced vibration technologies, our intelligent multihead weighers deliver precision, stability, and long-term reliability for modern packaging lines.

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