5-in-1 Four-Probe Testing Machine

1. Mechanical Transmission System

The equipment adopts a synchronous belt drive structure for the conveying mechanism, replacing traditional chain transmission. This design significantly reduces long-term wear-related issues such as positioning deviation and unstable feeding accuracy.

Key advantages include:

• Stable positioning with no stretching deformation over time

• Low operational noise and smooth transmission behavior

• No lubrication requirement, eliminating oil contamination problems in the working area

2. Feeding and Transfer System

The feeding module is designed with a cam-driven robotic transfer mechanism, ensuring consistent and repeatable material handling.

System characteristics:

• High-precision and stable feeding performance

• Increased feeding efficiency for continuous operation

• Built-in foot calibration mechanism to ensure fixture positioning accuracy and repeatability

3. Fixture Structure Design

The fixture is engineered with optimized mechanical layout to improve clamping stability and long-term durability.

Main features:

• Reinforced structure with tower springs and serrated clamping teeth for stronger grip

• ABS material construction for balance of strength and insulation performance

• Side-mounted copper contact design to prevent copper powder contamination caused by wear, improving cleanliness and electrical insulation stability

• No routine cleaning required under normal operating conditions

• Direct contact between test points and product leads eliminates intermediate contact layers, reducing signal loss

Additional enhancements:

• Knurled contact surface treatment prevents measurement deviation caused by dirt accumulation

• High consistency in contact positioning ensures stable high-frequency testing performance (up to 100 kHz and above)

• Low impedance contact structure improves measurement accuracy and repeatability

4. Measurement Principle (Four-Probe Method)

The system operates on a four-probe electrical measurement principle, widely used for resistivity and sheet resistance testing.

Working method:

• Two outer probes supply current to the sample

• Two inner probes measure voltage response

• Resistivity and resistance parameters are calculated based on voltage-current relationship

This configuration effectively eliminates errors caused by contact resistance and boundary effects, ensuring high measurement accuracy and repeatability.

5. Performance Characteristics

• High-precision cam transmission system with stable mechanical behavior

• Operating speed: up to 100 pieces per minute

• Suitable for continuous high-throughput testing environments

• Stable signal integrity for high-frequency measurement applications

6. Expanded Functional Modules (Optional Integration)

The system can be configured with multiple auxiliary functions depending on production requirements:

• Laser marking system

• Needle calibration and lead cutting module

• Automatic packaging and sorting system

• DVDT testing capability

• Low-consumption function testing

• CCD-based appearance inspection

• ESR testing module

7. Data Acquisition and Control System

All test parameters such as capacitance, loss factor, and insulation performance can be configured via touchscreen interface.

System capabilities include:

• Real-time data acquisition and storage

• Statistical analysis functions

• Capacitance distribution visualization

• Export of structured data files (e.g., Excel format)

8. Operating Procedure Overview

Typical workflow includes:

1. System login and initialization

2. Communication status verification

3. Process parameter setup/editing

4. Sample placement and fixture loading

5. Test program selection

6. Automated testing execution

7. Data saving and output

Operational notes:

• Sample cleanliness must be ensured before testing

• Proper current range selection is required for measurement stability

9. Typical Applications

This equipment is widely used in:

• Semiconductor material testing

• Photovoltaic material characterization

• Alloy and metal resistivity measurement

• Ceramic and conductive film evaluation

• University and research laboratory material analysis

10. Common Fault Handling

Frequently encountered issues and corrective actions include:

• Communication failure: check wiring and connection ports

• Measurement abnormality: inspect probe condition and replace if worn

• Data instability: verify sample cleanliness and contact pressure

11. Development Direction

Future system upgrades are expected to integrate intelligent control and data analytics technologies, enabling:

• Automated test optimization

• Real-time data analysis and visualization

• Enhanced production efficiency through software-assisted decision-making

Summary:
This Four-Probe Measurement Machine is a high-precision electrical characterization system designed for stable, high-throughput resistivity and sheet resistance testing. It combines advanced mechanical transmission, precise probe contact design, and modular functional expansion to meet the requirements of modern materials testing environments.