Shenzhen Espe Technology Co., Ltd, 401A, 501A502B Building 2, Hongxin Industrial Zone, Guanlan, Longhua, Shenzhen (2026)

05/08/2026

What are the commissioning steps for an ESPE safety light curtain?

Many mechanical devices require commissioning after the safety light curtain is installed to prevent problems during normal operation. How should the commissioning of the safety light curtain be performed after installation?

Step 1: Check Indicator Lights: Turn the power switch to the "off" position. After the safety light curtain is installed, turn on the power to supply power to the equipment; the indicator lights on the safety light curtain will illuminate.

Step 2: Align the Light Curtain: Turn on the power to the safety light curtain and adjust the positions of the transmitter and receiver, ensuring they are parallel and level. When the alignment is accurate, the red indicator light on the receiver will turn green.

Step 3: Inspection and Testing: Block each beam of the safety light curtain with an object and check the indicator light signal status on the receiver of each blocked beam.

Step 4: Test Run: Once all safety beams have been correctly commissioned, the system can be put into trial operation.

Safety light curtains are primarily used to protect machinery, equipment, and personnel. Proper installation, debugging, and maintenance are essential to ensure their effective protection. www.espetech.com

30/07/2026

Safety light curtains create a comprehensive safety barrier.

As an advanced safety protection device, safety light curtains are widely used in industrial automation, machinery, logistics, and other fields. They aim to provide a non-contact safety barrier for operators and machinery. What are the advantages of safety light curtains?

1. Non-contact protection: Safety monitoring can be achieved without physical contact, avoiding the mechanical injury risks that traditional protective devices may pose.

2. High sensitivity: They can quickly respond to the movement of small objects, ensuring reliable protection even in high-speed or complex working environments.

3. Easy installation and maintenance: Modular design simplifies the installation process while reducing the difficulty and cost of maintenance and parts replacement.

4. Improved work efficiency: While ensuring safety, they allow operators to work closer to the machine, improving work efficiency.

How to create a safety barrier:

1. Rational planning and layout: Based on the characteristics of the machinery and the working environment, rationally plan the installation location and protection area of the safety light curtain to ensure coverage of all potential hazards.

2. Integration into Safety Systems: Integrating the safety light curtain with the machine's safety control system enables automated safety monitoring and response mechanisms, improving overall safety protection levels.

3. Regular Inspection and Maintenance: Regularly inspecting and maintaining the safety light curtain ensures stable performance, promptly eliminates potential faults, and guarantees long-term stable operation.

In conclusion, the safety light curtain, as a reliable safety protection device, plays a crucial role in safety barriers. Through reasonable planning, high-quality product selection, system integration, regular inspection and maintenance, as well as training and awareness enhancement, safety protection levels can be further improved, ensuring the safety of personnel and machinery. http://www.espetech.com

28/07/2026

What is the difference between a safety light curtain and a safety light Barrier?

Safety light curtains and safety light barrier are essentially the same type of industrial safety protection equipment. There is no substantial technical difference; they are simply different names for the same product used in different countries, regions, and industries.

1. Similarities:

Their working principles are exactly the same: Both consist of a transmitter and a receiver, forming an "invisible protective wall" through infrared beams. When the beam is blocked, it immediately triggers an emergency stop.

They comply with the same set of international standards: IEC 61496-1/-2, ISO 13855, etc., and have consistent safety level requirements (usually PLe or SIL3).

Their core function is the same: protecting personnel from mechanical injuries such as those caused by stamping, shearing, and crushing. They are suitable for high-risk equipment such as punch presses, injection molding machines, and robotic workstations.

2. Differences in Name:

Safety Light Barrier: Focuses on the physical structure, describing the "barrier-like" structure formed by an array of light-emitting and receiving tubes.

Safety Light Curtain: Focuses on the protective effect, emphasizing the "curtain-like" protective surface composed of countless beams of light.

3. Regional and Industry Practices

Europe and North America: "Safety Light Curtain" is commonly used.

Asia and some industrial sectors: "Safety Light Barrier" is more commonly used. http://www.espetech.com

23/07/2026

What are the application advantages of installing a safety light curtain?

A safety light curtain, also known as a photoelectric safety protection device, is a non-contact safety protection device based on infrared light technology. It typically consists of a transmitter and a receiver, installed opposite each other on either side of the area to be protected. When an object (such as a hand, tool, or other obstacle) passes through the light curtain, it blocks some or all of the light, causing the light signal received by the receiver to weaken or be interrupted. This change is immediately recognized by the system as a danger signal, triggering an emergency shutdown or alarm mechanism, thereby effectively preventing accidents.

Advantages of using a safety light curtain:

1. High reliability: Safety light curtains employ advanced infrared sensing technology and signal processing algorithms, enabling accurate and rapid detection and response to obstacles, greatly reducing the probability of false alarms and missed alarms.

2. Flexibility and adaptability: The number, spacing, and coverage of the light beams can be adjusted according to different application needs, making it suitable for protection areas of various shapes and sizes, from simple straight-line protection to complex curved or three-dimensional spatial protection.

3. Non-contact protection: Safety protection is achieved without physical contact, avoiding the wear and tear and malfunctions of traditional mechanical safety devices, and without interfering with worker operations.

4. Easy integration and maintenance: Light curtain safety curtains are typically designed with standardized interfaces and communication protocols, facilitating integration with various control systems. Their modular design also makes maintenance and replacement easier.

5. Enhanced work environment safety: Through continuous monitoring and immediate response, light curtain safety curtains significantly reduce the risk of workplace injuries caused by human error or equipment malfunction, creating a safer working environment for workers. www.espetech.com

21/07/2026

What are the features of the EFP series blind-spot-free Level 4 safety light curtain?

The EFP series blind-spot-free Level 4 safety light curtain is a safety product independently developed by EFP. It complies with the IEC 61496 (Type 4) safety standard and features an internal MCU redundant design with dual-loop output, as well as periodic self-testing and mutual testing functions, providing comprehensive safety protection. The product features are as follows:

1. Compliant with IEC 61496 (Type 4) and ISO 13849.1 (Cat.4/PL e) safety standards;

2. High safety: Abundant self-test circuitry, periodic dual self-test and mutual test enhance safety;

3. Multiple synchronization methods: Available in optical and linear synchronization technologies;

4. Dual-channel redundant output: Employs a dual-loop redundant output design, with each output channel equipped with a self-diagnostic pulse to promptly diagnose faults such as overcurrent, short circuit to power supply, and mutual short circuits, ensuring safety and reliability;

5. External EDM function: Enables dynamic monitoring of external devices (relays, contactors, etc.) connected to the light curtain output, preventing safety function failure due to external device malfunctions;

6. Interlock reset function: The light curtain offers an optional interlock reset function, allowing for manual start and manual restart;

7. Versatile installation options: Suitable for various installation environments. http://www.espetech.com

16/07/2026

Precautions for Using Safety Light Curtains

Safety light curtains are widely used in the punch press industry, automated machinery, automated welding lines, hazardous areas (toxic, high-pressure, high-temperature, etc.), shearing equipment, and mechanical conveying and handling equipment.

Using safety light curtains on equipment in these fields can effectively prevent safety accidents, making company production safer and better protecting the safety of equipment operators, thus making company production safer and more stable.

The working principle of a safety light curtain is: an infrared transmitter emits infrared rays, which are received by a receiver to form a protective light curtain. When the light curtain is blocked, the protective device will send a corresponding signal to control the potentially dangerous equipment to stop or sound an alarm, preventing safety accidents.

Safety light curtains have certain requirements regarding ambient humidity and temperature because most equipment generates a lot of heat during operation. Some equipment that generates a lot of heat can reach 60-70 degrees Celsius. Under normal circumstances, safety light curtains can be used at temperatures around 60°C. If your equipment generates heat exceeding 60°C, you should inform the manufacturer when purchasing and using the safety light curtain. A robust outer casing that is waterproof, dustproof, and temperature-regulating is essential, ensuring stable and effective operation even in harsh environments. www.espetech.com

14/07/2026

What is the core obstacle avoidance principle of a safety scanner?

A safety scanner is an active obstacle avoidance device based on laser ranging and area monitoring. It is primarily used for hazardous area protection and obstacle avoidance for mobile devices (such as AGVs) in industrial automation. Its working principle can be divided into the following steps:

1. Laser Emission and Scanning: The scanner emits an infrared laser beam (typically a Class 1 safety laser, wavelength 905nm or 1550nm) through a rotating mirror or solid-state laser. The laser scans the environment in a fan-shaped or 360° range, covering a horizontal viewing angle (e.g., 270°) and a vertical viewing angle (e.g., 10°).

2. Time-of-Flight (ToF) Ranging: After the laser encounters an obstacle, it reflects off. The scanner determines the distance by calculating the time difference (Δt) between laser emission and reception: Distance (d) = (Speed of light × Δt) / 2; Ranging accuracy: up to ±30mm (e.g., ESPE LGA10 series).

3. Safety Zone Division: Users can customize the Warning Zone and Protective Field; Warning Zone: Provides early warning and slows down the equipment (e.g., triggered when the AGV is 1m away from an obstacle). Protective Field: Provides emergency shutdown to prevent collisions (e.g., cuts off power when the AGV is 0.3m away from an obstacle). www.espetech.com

09/07/2026

How to Determine the Height of a Safety Light Curtain

The height of a safety light curtain refers to its position relative to the upper and lower edges of the machine tool's die. While ensuring a safe distance, the lowest beam of the safety light curtain must not be higher than the lower edge of the die, and the highest beam must not be lower than the upper edge of the die.

The protection height of a safety light curtain refers to the distance between the uppermost and lowermost beam axes, i.e., the effective height of the light curtain. The protection height equals the machine tool slide travel plus the adjustment amount. The size of the protection height affects the number of beams in the safety light curtain. If the number of beams is too small, the light curtain height will not completely cover the danger zone, still posing a possibility of an accident; if it is too large, it will result in wasted funds and inconvenience in use. Therefore, selecting the specifications (number of beams) of the safety light curtain based on the protection height is also very important.

The safety distance of a safety light curtain refers to the shortest distance between the light curtain and the cutting edge of the die in the dangerous working area, i.e., the distance required for the slide to stop before reaching the danger boundary from the position where the light curtain is partially blocked. The safety distance is one of the necessary conditions for ensuring the safety light curtain achieves its protective function; the safety distance must be calculated correctly! The calculation method should be determined based on the braking mechanism of the pressure mechanism. www.espetech.com

07/07/2026

Safety Light Curtain Jitter Solutions

Safety light curtains are widely used safety protection devices in modern industrial equipment. They can detect the presence of people or objects and stop or halt machine operation to prevent worker injury. In this article, we will discuss the causes and solutions for safety light curtain jitter.

Here are some common causes of safety light curtain jitter:

1. Incorrect Light Curtain Position: When the light curtain is not positioned correctly, it can cause beam errors or highly uneven light spots, resulting in unstable detection signals.

2. External Interference: Electromagnetic interference, vibration, or other light sources can interfere with the light curtain signal.

3. Problems with the Light Curtain Itself: Due to prolonged use or other factors, the light curtain equipment may become damaged or age.

4. Other Mechanical Problems: Incorrect installation or problems with certain parts of the machine can also cause light curtain jitter.

To address the above causes, we can take the following measures to solve the safety light curtain jitter problem:

1. Readjust the Light Curtain Position: If the light curtain is not positioned correctly, it may be necessary to readjust the position of the light curtain equipment. Beam errors and uneven light spots can be corrected by moving the beam adjuster or rotating the mirror. 1. By adjusting the position of the light curtain equipment, you can ensure that the light curtain can stably detect the target, thus avoiding jitter and false detections.

2. Reduce external interference. Consider the following measures: avoid placing the light curtain equipment in locations with large fluctuations, vibrations, or temperature changes; use shielded cables and grounding; avoid placing the light curtain equipment in areas with strong light sources as much as possible; use easy-to-clean materials to keep the light curtain equipment clean.

3. Inspect and replace the equipment: When there is a problem with the light curtain equipment, it needs to be replaced or repaired. Testing and diagnostic tools can be used to inspect the light curtain equipment to determine if replacement or repair is necessary.

4. Resolve other mechanical problems: If the light curtain jitter problem is caused by a mechanical problem, the mechanical problem needs to be resolved. For example, it may be necessary to reinstall or replace the faulty component. http://www.espetech.com

30/06/2026

Necessity and Solution Recommendations for Safety Door Locks in Automated Equipment

In today's rapidly developing industrial automation landscape, over 60% of global industrial accidents caused by mechanical injuries each year are related to the failure of safety doors. As the last line of defense for isolating hazardous areas and ensuring the safety of personnel and equipment, the importance of safety door locks is self-evident. This article will delve into the necessity of safety door locks.

I. The Core Value of Safety Door Locks: From Passive Protection to Active Defense

1. Personnel Safety Protection: In high-speed operating equipment such as stamping presses and injection molding machines, accidental equipment startup when safety doors are not closed is a major cause of workplace injuries. ESPE safety door locks monitor door status in real time and cut off power or control signals when the door is not fully closed, preventing operators from contacting rotating parts, high-temperature areas, and other hazards.

2. Equipment Integrity Assurance: Foreign object entry or misoperation can cause equipment malfunctions, resulting in high repair costs. ESPE safety door locks' protective cover monitoring function can detect the door closing speed. If the door opens abnormally due to external impact, the system will immediately trigger an emergency stop mechanism.

3. Compliance Risk Mitigation: According to international standards such as ISO 13849 and EN ISO14119, automated equipment must be equipped with safety interlock devices. The product is CE and UL certified, and its self-diagnostic function can monitor equipment status in real time. In case of abnormalities, it triggers audible and visual alarms and records fault logs, helping companies meet safety production regulations.

II. Technical Advantages of ESPE Safety Door Locks

High Reliability Design: Utilizing solid-state switch technology, the response time is

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