Introduction

In the production process of textile factories, the napping machine (also known as the wire-drawing machine or yarn-extracting machine), as key equipment, undertakes the important tasks of stretching and homogenizing fibers. It is widely used in processes such as carding and yarn extraction. The Holip HLP-A100 inverter, as a general-purpose vector inverter, with its high reliability, wide range of applications, and rich control functions, can achieve precise control of the napping machine motor. This solution will comprehensively elaborate on the specific application of the Holip HLP-A100 inverter in the napping machine, covering the application positions, wiring methods, parameter settings, control logic, and providing descriptions of the electrical wiring diagram and control schematic. Additionally, equipment such as PLCs, touch screens, or industrial computers can be introduced according to requirements to achieve more advanced control functions.

I. Equipment Situation of the Napping Machine and Motor Function Analysis

The napping machine mainly stretches and homogenizes fibers through a series of rollers (or rolls). These rollers are usually driven by motors, and some roller groups may require independent motors to achieve precise speed control and ensure a constant drawing ratio (yarn-extracting ratio) of fibers between different rollers. The napping machine mainly includes the following key components and motor functions:

• Main Stretching Roller Motor: Assumes the main stretching function and requires variable speed control to adapt to different fiber types and production requirements.
• Auxiliary Roller Motor: Used for auxiliary stretching and fiber conveying, which may run synchronously with the main motor at a fixed speed ratio.
• Conveying Motor: Responsible for conveying fibers from upstream equipment (such as carding machines) to the napping machine and conveying the processed fibers to downstream equipment (such as spinning machines).
• Tension Control Motor: Some high-end napping machines are equipped with a dedicated tension control motor to maintain fiber tension and ensure production quality.

The motors of the napping machine are usually three-phase asynchronous motors with a power range of 1.5kW – 15kW, depending on the machine size and production capacity. This solution is based on the design of a main stretching roller motor with a power of 4kW.

II. Key Features and Specifications of the Holip HLP-A100 Inverter

The Holip HLP-A100 inverter, as a general-purpose vector inverter, is suitable for various motor control needs in the industrial field. Below are its key features and specifications (based on the official manual):

This solution selects a model suitable for a 4kW motor from the HLP-A100 series, such as HLP-A100004043 (the specific model needs to be confirmed according to the manual).

III. Inverter Application Solution Design

3.1 Application Position

The Holip HLP-A100 inverter is mainly applied to the main stretching roller motor of the napping machine to achieve variable speed control of the main stretching roller. If the napping machine has multiple roller groups, multiple HLP-A100 inverters can be used, and cascade control can be implemented to achieve synchronous operation between different rollers and ensure a constant drawing ratio.

3.2 Wiring Method

3.2.1 Main Circuit Wiring

• Main Circuit Terminals:
  • R, S, T: Connect to the three-phase AC power supply (380V/50Hz).
  • U, V, W: Connect to the motor output terminals.
  • PE: Grounding terminal, which must be connected to a reliable ground.
• Brake Circuit (if required):
  • +UDC, -UDC: Connect to the brake resistor (the resistance value is selected according to the manual, usually 0.15 – 0.4Ω).

3.2.2 Control Circuit Wiring

• Digital Inputs (DI):
  • DI1: Forward Run.
  • DI2: Stop.
  • DI3: Reverse Run (if required).
  • DI4: Other auxiliary functions (such as emergency stop).
• Analog Inputs (AI):
  • AI1: Speed reference signal (e.g., provided by an external potentiometer or PLC).
• Relay Outputs (Relay):
  • KA – KB: Fault alarm output.
  • FA – FB – FC: Running status indication.
• Communication Interface (RS485):
  • RS+, RS-: Connect to the communication port of the PLC or touch screen.

3.2.3 Wiring Diagram Description

[Three-phase Power Supply] — R, S, T — [Holip HLP-A100 Inverter] — U, V, W — [Main Stretching Roller Motor]
[Ground] — PE — [Holip HLP-A100 Inverter]
[External Control Signal] — DI1(DI2/DI3/DI4) — [Holip HLP-A100 Inverter]
[Speed Reference Signal] — AI1 — [Holip HLP-A100 Inverter]
[Fault Alarm] — KA – KB — [Alarm Light or PLC]
[Running Status] — FA – FB – FC — [Indicator Light or PLC]
[Communication] — RS+, RS- — [PLC/Touch Screen]

3.3 Parameter Settings

Parameter settings are crucial for ensuring the normal operation of the inverter. Below are the typical parameter settings for the main stretching roller motor of the napping machine (based on the HLP-A100 manual):

3.3.1 Basic Parameters

• C01. Configuration Parameters
  • C01.00 Configuration Mode: Set to “Speed Open Loop”.
  • C01.20 Motor Rated Power: Set to 4.0kW.
  • C01.21 Motor Rated Voltage: Set to 380V.
  • C01.22 Motor Rated Current: Set according to the manual or motor nameplate (e.g., 7.8A).
  • C01.23 Motor Rated Frequency: Set to 50Hz.
  • C01.24 Motor Slip: Set according to the motor parameters (usually 1% – 5%).

3.3.2 Reference and Ramp Parameters

• C03. Reference/Ramp Parameters
  • C03.03 Maximum Reference: Set to 50.0Hz (or adjust according to actual requirements).
  • C03.04 Minimum Reference: Set to 0.5Hz (to avoid crawling at low speeds).
  • C03.05 Acceleration Time 1: Set to 5.0 seconds (adjust according to production requirements).
  • C03.06 Deceleration Time 1: Set to 5.0 seconds (adjust according to production requirements).

3.3.3 Digital Input/Output Parameters

• C05. Digital Input/Output Parameters
  • C05.00 DI1 Function: Set to “Forward Run”.
  • C05.01 DI2 Function: Set to “Stop”.
  • C05.02 DI3 Function: Set to “Reverse Run” (if required).
  • C05.10 DO1 Function: Set to “Running Status”.

3.3.4 Analog Input/Output Parameters

• C06. Analog Input/Output Parameters
  • C06.99 AI1 Function: Set to “Frequency Command”.

3.3.5 Cascade Control Parameters (if synchronous control is required)

• C25. App. Functions Cascade Parameters
  • If multiple motors need to be synchronized, the main inverter can be set as the master, and the auxiliary inverters can be set as slaves, with the frequency ratio set.

3.4 Advanced Control Solution: Introducing PLC and Touch Screen

To achieve more advanced control and a user interface, a PLC and touch screen can be introduced. Below is the recommended solution:

3.4.1 PLC Selection

Select a PLC that supports the Modbus RTU protocol, such as the Siemens S7-200 series or Schneider Modicon series. The PLC is responsible for handling logic control, such as start, stop, speed setting, and fault handling.

3.4.2 Touch Screen Selection

Select a touch screen that supports Modbus RTU, such as the Weintek MT8071i series. The touch screen is used for the user interface, providing start/stop buttons, speed setting sliders, status displays, etc.

3.4.3 PLC and Touch Screen Wiring

• The PLC is connected to the inverter via RS485 communication.
• The touch screen is connected to the PLC’s communication port or directly to the inverter (if the touch screen supports direct control).

3.4.4 PLC Program Design

• Use the PLC’s Modbus function blocks to read the inverter’s status (such as running status, output frequency).
• Use the PLC’s Modbus function blocks to write control commands to the inverter (such as start, stop, frequency setting).
• Logic can be added to the PLC program, such as:
  • When the start button is pressed, send the start command after checking safety conditions.
  • When the speed setting changes, update the inverter’s frequency command.

3.4.5 Touch Screen Design

• Main Screen: Display the current speed, running status, and fault information.
• Control Buttons: Start, stop, emergency stop.
• Parameter Setting Page: Allow adjustment of acceleration/deceleration time, maximum/minimum frequency, etc.

IV. Control Schematic Description

Below is a description of the overall control schematic of the system:

[Three-phase Power Supply] — [Holip HLP-A100 Inverter] — [Main Stretching Roller Motor]
[External Control Signal] — [Holip HLP-A100 Inverter] — [PLC]
[PLC] — [Touch Screen]
[PLC] — [Other Auxiliary Devices (such as alarm lights, indicator lights)]

V. Summary and Key Notes

The application of the Holip HLP-A100 inverter in the napping machine can significantly improve production efficiency and product quality. Through precise speed control and synchronization functions, it ensures the uniform stretching of fibers. Below are the key notes:

• Model Selection: Select the appropriate inverter model according to the power of the napping machine motor.
• Wiring: Ensure correct connection of the main circuit and control circuit, paying attention to grounding and shielding.
• Parameter Settings: Adjust parameters such as acceleration/deceleration time and maximum/minimum frequency according to actual production requirements.
• Safety Protection: Ensure that the emergency stop function works normally and comply with relevant safety standards.
• Advanced Control: Achieve more flexible control and monitoring through PLC and touch screen.

Through the implementation of this solution, the efficient operation of the napping machine can be achieved, providing more reliable production assurance for textile factories.

I. Introduction

This document aims to design a detailed application scheme based on the Kinco CV20 inverter for the PE pipe packaging and pipe arranging machine (winding machine). The scheme covers motor function analysis, inverter selection, wiring methods, parameter settings, and control system integration. The pipe arranging machine uses a winding mechanism to evenly wrap PE pipes onto a reel, requiring precise control of winding speed and tension. The CV20 inverter, with its variable frequency speed regulation and communication capabilities, can meet the requirements of multi-motor coordinated control.

II. Motor Function Analysis for the Pipe Arranging Machine

Main Winding Motor

• Function: Drives the winding mechanism to control the winding speed and tension of the PE pipe.
• Parameters: Three-phase asynchronous motor, 380V/2.2kW.

Lateral Movement Motor

• Function: Drives the conduit device to move horizontally, ensuring even distribution of the pipes.
• Parameters: Three-phase motor (or single-phase), 380V/0.75kW.

Auxiliary Motor

• Function: Such as driving a conveyor belt, with low power and no need for inverter control.
• Application Positioning: The CV20 inverter is mainly used for speed regulation and synchronous control of the main winding motor and lateral movement motor.

III. CV20 Inverter Selection

Key Features:

• Output Frequency: 0-300Hz, supports V/F control and automatic torque boost.
• Communication Interface: Built-in Modbus RS485, compatible with PLC integration.
• Environmental Adaptability: Temperature -10℃~50℃, humidity 5%~95%RH.

IV. Wiring Methods

1. Main Circuit Wiring

• Power Input: Three-phase 380V AC → Circuit Breaker → Inverter R/L1, S/L2, T/L3 (PE grounded).
• Motor Output: Inverter U/T1, V/T2, W/T3 → Motor U, V, W.

2. Control Circuit Wiring

• Control Methods:
  • Keyboard Control: Directly set frequency and start/stop.
  • Terminal Control:
    • X1: Start/Stop
    • X2: Forward/Reverse (Lateral Movement)
    • X3: Emergency Stop
    • AI1: Analog Frequency Input
  • Communication Control: RS485 interface (+5V, 485+, 485-, GND) connected to PLC/HMI.
• Wiring Example:复制代码Main Power (R,S,T,PE) ----> [Circuit Breaker] ----> [CV20-4T-0022G] (R/L1,S/L2,T/L3,PE) ----> [Main Winding Motor] (U,V,W) | |----> [CV20-4T-0007G] (R/L1,S/L2,T/L3,PE) ----> [Lateral Movement Motor] (U,V,W)Control Circuit:External Start Button ----> X1 (CV20-4T-0022G)Analog Signal Source ----> AI1 (CV20-4T-0022G)

V. Parameter Settings

1. Main Winding Motor (CV20-4T-0022G)

2. Lateral Movement Motor (CV20-4T-0007G)

VI. PLC and HMI Selection

• PLC: Recommend Siemens S7-200 (e.g., S7-224) or Omron CP1E, supporting Modbus communication.
• HMI: Recommend Siemens KTP400 or Omron NB5W, for parameter setting and status monitoring.
• Communication Configuration:
  • Inverter P51: Modbus-RTU protocol
  • Baud Rate P52: 9600bps
• Control Architecture:复制代码PLC ----> [RS485] ----> CV20-4T-0022G ----> Main Winding Motor | |----> [RS485] ----> CV20-4T-0007G ----> Lateral Movement Motor | |----> HMI (display status, set parameters)

VII. Function Realization

Main Winding Motor:

• Speed Control: Achieve multi-level winding speeds through frequency adjustment.
• Tension Control: PID closed-loop regulation (requires tension sensor).

Lateral Movement Motor:

• Reciprocating Motion: Automatic direction switching using triangle wave frequency mode.
• Synchronous Control: PLC reads the main motor frequency and dynamically adjusts the lateral speed.

VIII. Safety and Protection Measures

• Grounding Protection: PE terminal reliably grounded, grounding wire ≥3.5mm².
• Overcurrent Protection: Main circuit equipped with circuit breakers/fuses.
• Emergency Stop Function: X3 terminal connected to emergency stop button.
• Voltage Protection: Inverter built-in overvoltage/undervoltage alarm.

IX. Conclusion

The Kinco CV20 inverter can efficiently control the main winding and lateral movement motors of the PE pipe arranging machine through flexible wiring methods, parameter configuration, and communication functions. It is recommended to build an automated system in combination with PLC and HMI, with specific model selection referring to Siemens or Omron products. Users need to further optimize settings based on actual equipment parameters and follow the manufacturer’s safety specifications.

Note: This scheme is a general design, and parameters and wiring may need to be adjusted in actual applications based on equipment manuals and site conditions.

I. Scheme Overview

This scheme aims to apply the Lianchuang High-Tech LC400E inverter to the unwinding and slitting machine. By precisely controlling the motor speed and torque, it achieves automation and efficient operation of core functions such as unwinding, cutting, and rewinding. The scheme covers motor function analysis, wiring methods, parameter settings, function realization, and auxiliary equipment selection to ensure the efficiency and stability of the unwinding and slitting machine’s production.

II. Analysis of the Unwinding and Slitting Machine Structure and Motor Configuration

Equipment Functions
The unwinding and slitting machine is used to cut wide rolls of materials into multiple narrow rolls. Its core functions include unwinding, cutting, and rewinding.

Motor Configuration

• Unwinding Motor: Controls the unwinding speed of the parent roll and requires constant tension to prevent material slack or breakage.
• Rewinding Motor: Controls the winding of narrow materials and requires tension adjustment according to the roll diameter (trapezoidal tension).
• Cutting Motor: Drives the cutting components and requires precise speed control.

Control Requirements
Tension control is the core requirement. It needs to achieve constant tension during unwinding and trapezoidal tension during rewinding through motor torque control.

III. Key Features of the LC400E Inverter

• High-Performance Vector Control: Supports precise speed and torque control to meet tension synchronization requirements.
• Multi-Mode Control: Terminal control, analog input, and multi-speed settings to adapt to different working conditions.
• Safety Protection: Functions such as overvoltage, overcurrent, and motor protection ensure equipment safety.
• Communication Capabilities: Supports Modbus communication (RS232/RS485) for easy integration with PLC/HMI.
• Adjustable Parameters: Acceleration/deceleration time, PID control, and other parameters can be flexibly adjusted.
• Specifications: Power range from 0.75 kW to 500 kW, with output current reaching 63 A for models like G022/T4, suitable for the motor requirements of the unwinding and slitting machine.

IV. Application Positions of the LC400E in the Unwinding and Slitting Machine

• Unwinding Motor: Torque control mode to maintain constant tension.
• Rewinding Motor: Speed/torque control mode to support trapezoidal tension adjustment.
• Cutting Motor: Speed control mode to ensure cutting accuracy.
  Application Suggestions: Configure multiple inverters according to the number of motors, such as one for the unwinding motor and one for the rewinding motor.

V. Wiring Methods

Main Circuit Wiring

• Connect the input terminals (R, S, T) to the three-phase power supply and the output terminals (U, V, W) to the motor. Connect the PE terminal to the ground.
• Refer to the LC400E manual for wire size specifications (e.g., for a 22 kW model, the input is 100 A, and the output is 63 A).

Control Circuit Wiring

• Start/Stop Control: DI1 (forward), DI2 (reverse), DI3 (stop).
• Speed Control: AI1 connects to the speed reference signal (e.g., potentiometer or PLC output).
• Tension Control: AI2 connects to the tension sensor output (if available).
• Fault Signal: DO1 connects to the alarm system.
• Communication: RS485 connects to the PLC/HMI.

Electrical Wiring Diagram (Text Description)

• [Main Circuit]
  Power (three-phase) — R, S, T — LC400E — U, V, W — Motor
  PE — Ground
• [Control Circuit]
  Start/Stop Buttons — DI1/DI2/DI3
  Speed Reference — AI1
  Tension Feedback — AI2
  Fault Output — DO1
  Communication — RS485 — PLC/HMI

VI. Parameter Settings

Basic Parameters

• P0-02: Set the operation command source to 1 (terminal control).
• P0-03: Set the frequency command source to 2 (AI1).
• P0-17/P0-18: Set the acceleration/deceleration time to 1.5 seconds.
• P6-10: Set the stop mode to 0 (deceleration stop).

Tension Control Parameters

• Unwinding Motor: Enable torque control (P3-00) and set the torque command source to AI2 (if a sensor is available).
• Rewinding Motor: Enable trapezoidal tension control (P7-00).

Multi-Speed Settings

• Set P0-03 to 6 (multi-speed command). Use DI4/DI5 to select the speed segment, and set the speed values in PC-00~PC-15.

Parameter Setting Table

VII. Functions Realized

• Precise Speed Control: Set the speed through AI1 and support multi-speed switching.
• Tension Control: Maintain constant tension during unwinding and trapezoidal tension during rewinding to prevent material breakage or slack.
• Synchronization Control: The PLC coordinates the operation of multiple motors to ensure uniform tension.
• Fault Protection: DO1 outputs fault signals, and P6 group parameters set protection functions.
• Communication Integration: Modbus protocol enables remote monitoring and parameter adjustment.

VIII. PLC, Touch Screen, and Industrial Computer Selection

PLC Selection

• Recommended models: Siemens S7-1200 (high performance) or Mitsubishi FX series (cost-effective).

Touch Screen Selection

• Recommended models: Siemens KTP600 (easy to operate) or Mitsubishi GOT series (multi-language support).

Application Description

• PLC Functions: Read HMI inputs, send control commands, monitor status, and coordinate multiple motors.
• HMI Functions: Provide an operation interface, display status information, and support data logging.

Communication Connection

• Connect the PLC to the LC400E via RS485 with a baud rate of 9600 and no parity.

Control Diagram (Text Description)

• HMI — Ethernet/Serial — PLC
  PLC — RS485 — LC400E (Unwinding/Rewinding/Other Motors)
  PLC Program: Read HMI Inputs → Send Control Commands → Read Status → Update HMI Display

IX. Precautions and Safety Considerations

• Safety Protection: Install an emergency stop button and set inverter protection parameters.
• Tension Control: Prioritize the installation of tension sensors to ensure control accuracy.
• Multi-Motor Synchronization: Coordinate through the PLC to avoid uneven tension.
• Environmental Requirements: Install the inverter in a well-ventilated and dry environment, away from dust and moisture.

X. Summary

This scheme achieves high-precision speed and tension control through the application of the LC400E inverter in the unwinding and slitting machine, combined with PLC and HMI for automated operation. Key measures include:

• Adopting constant tension and trapezoidal tension control for the unwinding and rewinding motors, respectively.
• Using standard wiring methods and key parameter settings to ensure system stability.
• Selecting Siemens/Mitsubishi equipment to achieve efficient automated control.
  This scheme can significantly improve the production efficiency of the unwinding and slitting machine, reduce operation difficulty and fault risks, and is suitable for the roll material processing industry.

Introduction

The rotary cutting machine is an essential piece of equipment in the woodworking industry, primarily used to peel logs into thin veneer sheets, which are widely applied in the production of plywood, furniture, and decorative materials. To achieve efficient and precise processing, the rotary cutting machine relies on the coordinated operation of multiple motors, including the main spindle motor for log rotation, the cutting blade motor for veneer cutting, the conveyor belt motor for veneer output, and the feed motor for controlling cutting thickness. These motors require precise speed and torque control to ensure processing quality and production efficiency. As a versatile electrical device capable of flexibly controlling motor operation, the inverter plays a critical role in the rotary cutting machine.

This article provides a detailed explanation of how to apply the Mobeck MT110 inverter to various motor control aspects of a rotary cutting machine, covering functional analysis, inverter selection, wiring design, parameter settings, and the integration of PLC and touchscreen systems. Through a well-designed and implemented solution, the rotary cutting machine can achieve efficient, stable, and automated operation, meeting the demands of modern woodworking processes.

Functional Analysis of the Rotary Cutting Machine

The primary task of a rotary cutting machine is to process logs into veneer sheets, involving log fixation and rotation, cutting by the blade, veneer output, and precise control of cutting thickness. Below is a detailed analysis of the main motor functions in a rotary cutting machine:

1. Main Spindle Motor (Rotation Function)

• Function: The main spindle motor drives the log to rotate, serving as the core power component of the rotary cutting machine.
• Characteristics: It requires high power, typically ranging from 5.5 kW to 15 kW (depending on the machine size), and needs stable speed output while allowing dynamic speed adjustments based on processing requirements.
• Control Requirements: The inverter must support vector control mode to ensure high torque output at low speeds and be capable of receiving external speed reference signals (e.g., from a PLC or potentiometer).

2. Cutting Blade Motor (Cutting Function)

• Function: This motor drives the cutting blade to peel the rotating log into veneer sheets.
• Characteristics: The power typically ranges from 3 kW to 7.5 kW, with speed adjustments required based on veneer thickness, and stable torque support during cutting.
• Control Requirements: The inverter needs fast start/stop capabilities and precise speed control, often requiring synchronization with the main spindle motor.

3. Conveyor Belt Motor (Conveying Function)

• Function: It ensures the smooth output of cut veneer sheets, maintaining production continuity.
• Characteristics: The power is relatively low, typically between 0.75 kW and 2.2 kW, with speed needing to match the cutting rhythm.
• Control Requirements: The inverter should support simple speed regulation and may need to operate in coordination with the cutting blade motor.

4. Feed Motor (Feed Function)

• Function: It controls the feed speed of the cutting blade or log, directly determining the veneer thickness.
• Characteristics: The power is low (0.75 kW to 1.5 kW), and it can be either an asynchronous motor or a servo motor, requiring high-precision speed control.
• Control Requirements: If using an asynchronous motor, the inverter must support high-precision speed regulation and accept external analog signal inputs; if using a servo motor, a dedicated servo drive is required.

5. Other Auxiliary Motors

• Function: These include motors for clamping devices, chip removal fans, etc., used to assist the processing operation.
• Characteristics: The power is low (0.37 kW to 1.5 kW), with simple control requirements, typically needing only basic start/stop functions.

From the above analysis, it is clear that the motor control requirements of a rotary cutting machine are diverse. The main spindle and cutting blade motors demand high-performance control, while the conveyor belt and feed motors prioritize speed stability and precision. The Mobeck MT110 inverter, with its flexible control modes and rich functionality, is an ideal choice to meet these requirements.

Application Scheme of Mobeck MT110 Inverter

1. Inverter Application Positions

Based on the functional characteristics of the rotary cutting machine, the Mobeck MT110 inverter can be applied to the following key motor positions:

• Main Spindle Motor: Use the MT110 inverter for vector control to ensure stable log rotation.
• Cutting Blade Motor: Use the MT110 inverter for speed control, synchronized with the main spindle motor.
• Conveyor Belt Motor: Use the MT110 inverter for simple speed regulation.
• Feed Motor: If an asynchronous motor is used, the MT110 inverter can provide high-precision speed control; if a servo motor is used, a separate servo drive is required.

2. Inverter Selection

Assuming a medium-sized rotary cutting machine with the following motor power configuration:

• Main Spindle Motor: 7.5 kW
• Cutting Blade Motor: 5.5 kW
• Conveyor Belt Motor: 1.5 kW
• Feed Motor: 1.1 kW (asynchronous motor)

Based on the motor power and load characteristics, the following Mobeck MT110 inverter models are selected:

• Main Spindle Motor: MT110-7.5kW (rated power 7.5 kW, 380V three-phase)
• Cutting Blade Motor: MT110-5.5kW (rated power 5.5 kW, 380V three-phase)
• Conveyor Belt Motor: MT110-1.5kW (rated power 1.5 kW, 380V three-phase)
• Feed Motor: MT110-1.1kW (rated power 1.1 kW, 380V three-phase)

When selecting the inverter, ensure that its rated capacity is slightly higher than the motor power to provide a margin for potential overload conditions.

3. Wiring Design

The following uses the main spindle motor (7.5 kW) MT110 inverter as an example to detail the wiring method. The wiring for other motors is similar, with adjustments based on power and control requirements.

(1) Main Circuit Wiring

• Power Input: Connect the three-phase 380V power supply to the inverter’s R, S, and T terminals.
• Motor Output: Connect the inverter’s U, V, and W terminals to the three-phase input of the main spindle motor.
• Grounding: Connect the inverter’s grounding terminal and the motor’s grounding terminal to the ground wire to ensure electrical safety.

Main Circuit Wiring Diagram (Text Description):

Power Supply (380V Three-Phase)
  L1 ---- R
  L2 ---- S
  L3 ---- T
         |
         |---- Ground Terminal ---- Ground
         |
  U ---- Motor U Phase
  V ---- Motor V Phase
  W ---- Motor W Phase
         |
         |---- Motor Ground Terminal ---- Ground

(2) Control Circuit Wiring

The control terminals of the MT110 inverter include digital inputs (DI), analog inputs (AI), and relay outputs (RO). Using the main spindle motor control as an example:

• Start/Stop Control:
• DI1 (Forward Start): Connect to the PLC output point (e.g., Y0) to control inverter start via the PLC.
• DI2 (Stop): Connect to the PLC output point (e.g., Y1) to control inverter stop via the PLC.
• COM: Common terminal, connected to the PLC’s common terminal.
• Speed Reference:
• AI1 (Analog Input): Connect to the PLC’s analog output module (0-10V signal) for speed regulation.
• GND: Analog ground, connected to the PLC’s analog ground.
• Fault Output:
• RO1A/RO1B (Relay Output): Connect to the PLC input point (e.g., X0) to detect inverter faults.

Control Circuit Wiring Diagram (Text Description):

PLC Output
  Y0 ---- DI1 (Forward Start)
  Y1 ---- DI2 (Stop)
  COM ---- PLC Common Terminal

PLC Analog Output
  0-10V ---- AI1 (Speed Reference)
  GND ---- GND

Inverter Relay Output
  RO1A ---- X0 (PLC Input, Fault Detection)
  RO1B ---- PLC Common Terminal

4. Parameter Settings

Using the main spindle motor (7.5 kW) MT110 inverter as an example, the key parameter settings are listed below. Assuming the MT110 inverter’s parameter numbering is similar to that of a general-purpose inverter, the settings are as follows:

• P0.03 (Control Mode): Set to 1 (Vector Control without PG), suitable for the high torque requirements of the main spindle motor.
• P0.04 (Run Command Source): Set to 1 (Terminal Control), using DI1/DI2 for start/stop control.
• P0.06 (Frequency Reference Source): Set to 2 (AI1 Analog Input), using the PLC’s 0-10V signal to set the speed.
• P1.00 (Motor Rated Power): Set to 7.5 (7.5 kW).
• P1.01 (Motor Rated Voltage): Set to 380 (380V).
• P1.02 (Motor Rated Frequency): Set to 50 (50 Hz).
• P1.03 (Motor Rated Speed): Set to 1460 (assuming a 4-pole motor, approximately 1460 rpm at 50 Hz).
• P2.00 (Acceleration Time): Set to 5 (5 seconds) to avoid startup shock.
• P2.01 (Deceleration Time): Set to 5 (5 seconds) to ensure smooth stopping.
• P5.00 (DI1 Function): Set to 1 (Forward Run).
• P5.01 (DI2 Function): Set to 2 (Stop).
• P6.00 (Relay Output Function): Set to 1 (Fault Output).

Parameter settings for other motors should be adjusted based on their specific functions:

• Cutting Blade Motor: Set acceleration/deceleration time to 3 seconds to accommodate fast start/stop requirements.
• Conveyor Belt Motor: Use V/F control (P0.03=0) to simplify control logic.
• Feed Motor: Requires high-precision speed control, so adjust the gain and offset parameters of AI1 (e.g., P4 group parameters).

Parameter Settings Example Table:

5. PLC and Touchscreen Selection and Application

(1) Selection

To achieve automated control of the rotary cutting machine, a PLC and touchscreen are required:

• PLC: Recommend the Siemens S7-200 SMART series (e.g., CPU 224XP), which supports analog input/output and offers strong scalability.
• Touchscreen: Recommend the Siemens KTP400 Basic (7-inch), which supports communication with the PLC via Profinet and provides an intuitive operation interface.

(2) PLC Program Design

The PLC is responsible for coordinating the operation of each motor, with the main functions including:

• Start/Stop Control: Use PLC output points (e.g., Y0, Y1) to control the DI1/DI2 of each inverter, enabling motor start/stop.
• Speed Regulation: Use the PLC’s analog output module (0-10V) to control the inverter’s AI1, dynamically adjusting each motor’s speed.
• Synchronization Control: Calculate the speed ratio between the main spindle motor and the cutting blade motor through the program to ensure consistent cutting thickness.
• Fault Detection: Use the inverter’s relay output (RO1A/RO1B) to send fault signals to the PLC input point (e.g., X0), triggering an alarm.

PLC Control Diagram (Text Description):

PLC
  Y0 ---- Main Spindle Inverter DI1 (Start)
  Y1 ---- Main Spindle Inverter DI2 (Stop)
  AO0 ---- Main Spindle Inverter AI1 (Speed Reference)
  X0 ---- Main Spindle Inverter RO1A (Fault Input)

  Y2 ---- Cutting Blade Inverter DI1 (Start)
  Y3 ---- Cutting Blade Inverter DI2 (Stop)
  AO1 ---- Cutting Blade Inverter AI1 (Speed Reference)
  X1 ---- Cutting Blade Inverter RO1A (Fault Input)

Touchscreen ---- PLC (via Profinet Communication)

PLC Program Pseudo-Code Example:

VAR
    Start_Main : BOOL;        // Main Spindle Motor Start Signal
    Stop_Main : BOOL;         // Main Spindle Motor Stop Signal
    Speed_Main : REAL;        // Main Spindle Motor Speed (0-10V)
    Start_Feed : BOOL;        // Feed Motor Start Signal
    Stop_Feed : BOOL;         // Feed Motor Stop Signal
    Speed_Feed : REAL;        // Feed Motor Speed (0-10V)
    Start_Conveyor : BOOL;    // Conveyor Belt Motor Start Signal
    Stop_Conveyor : BOOL;     // Conveyor Belt Motor Stop Signal
    Speed_Conveyor : REAL;    // Conveyor Belt Motor Speed (0-10V)
END_VAR

// Main Spindle Motor Control
IF Start_Main AND NOT Stop_Main THEN
    Inverter_Main.CommandWord := 16#83; // Run Forward
    Inverter_Main.FrequencyReference := Speed_Main * 5; // 0-10V corresponds to 0-50Hz
ELSE IF Stop_Main THEN
    Inverter_Main.CommandWord := 16#80; // Stop
END_IF

// Feed Motor Control
IF Main_Spindle_At_Speed AND Start_Feed AND NOT Stop_Feed THEN
    Inverter_Feed.CommandWord := 16#83;
    Inverter_Feed.FrequencyReference := Speed_Feed * 5;
ELSE IF Stop_Feed THEN
    Inverter_Feed.CommandWord := 16#80;
END_IF

// Conveyor Belt Motor Control
IF Cutting_In_Progress AND Start_Conveyor AND NOT Stop_Conveyor THEN
    Inverter_Conveyor.CommandWord := 16#83;
    Inverter_Conveyor.FrequencyReference := Speed_Conveyor * 5;
ELSE IF Stop_Conveyor THEN
    Inverter_Conveyor.CommandWord := 16#80;
END_IF

(3) Touchscreen Interface Design

The touchscreen is used for parameter settings and operation status monitoring, with the main interfaces including:

• Main Interface: Displays the operation status (running/stopped), current speed (Hz), and fault status of each motor.
• Parameter Setting Interface: Sets the target speed of each motor (via PLC AO output) and veneer thickness (via feed motor speed adjustment).
• Alarm Interface: Displays inverter fault information (e.g., overload, overheating) and provides a reset button.

6. Safety Considerations

To ensure the safe operation of the equipment, the following precautions should be observed:

1. Electrical Safety: Ensure reliable grounding of the inverter and motor to prevent electrical leakage risks.
2. Operational Safety: Set an emergency stop button on the touchscreen, allowing the PLC to stop all inverters simultaneously.
3. Overload Protection: Enable overload protection in the inverter parameters (e.g., P9 group parameters) to prevent motor overheating.
4. Maintenance Safety: Regularly inspect the inverter’s cooling fan and wiring terminals to ensure long-term operational stability.

Conclusion

Through the above scheme, the Mobeck MT110 inverter can fully meet the control requirements of a rotary cutting machine:

• Main Spindle Motor: Achieves smooth log rotation with adjustable speed, ensuring processing continuity.
• Cutting Blade Motor: Operates synchronously with the main spindle motor, ensuring cutting quality.
• Conveyor Belt Motor: Provides stable veneer output, with speed matching the cutting rhythm.
• Feed Motor: Precisely controls veneer thickness, improving product consistency.
• PLC and Touchscreen: Enable automated control and human-machine interaction, enhancing equipment efficiency and ease of operation.

The advantages of this scheme lie in its modular design and flexibility, allowing users to adjust motor power, inverter models, and control parameters based on actual needs. Additionally, the integration of a PLC and touchscreen enables the rotary cutting machine to achieve a higher level of automation, significantly improving production efficiency and product quality.