Our cooperative customer ordered the motor of SM150 automatic door unit, and then gave us feedback on this problem. Question: This motor worked one week after installtion, after that it got struck and not moving smothly. We put another motor then it working S4A:We are glad to hear that the automatic door system is currently running smoothly with the new replacement motor. Regarding the first motor which "worked for one week, then got struck and moved un-smoothly,"  our engineering team has conducted a comprehensive internal technical analysis. In the automatic door industry,  when a motor encounters this specific symptom shortly after installation, it is usually triggered by one of the following factors.  We highly recommend having your technicians double-check the onsite environment to safeguard the new motor: 1. Over-Tensioned Drive Belt (Most Common Cause) If the timing belt is adjusted too tightly during installation, it exerts an excessive radial force on the motor's output shaft.  Within a week of operation, this extreme tension can cause the internal bearings of the motor to wear down prematurely  or deform due to friction heat, eventually leading to the motor getting stuck or losing its smoothness. 2. Mechanical Track Resistance & Overload If the door panels exceed the rated weight capacity, or if the guide rails/hangers are not perfectly aligned,  the rolling resistance will significantly multiply over a few days. Running under a constant overload condition  forces the motor to overheat, causing the internal gearbox lubricants to dry up or the gears to seize. 3. Frequent Motor Stalling (Improper Stopper Settings) If the mechanical end-stoppers (limits) are positioned incorrectly, the door might constantly smash or push hard against the boundaries before the controller cuts the power. This continuous "stalling status" creates high currents that  can damage the internal gear structure within days. Our Next Steps & Support: Onsite Inspection Suggestion: Please ask your team to verify that the belt tension is optimal (not too rigid) and ensure  the door leaf can slide seamlessly by hand when the power is turned off. Warranty Solution: At S4A, we strictly stand behind our commitment to "Quality First". We want to fully investigate the defective unit to improve our quality. Could you please keep the stuck motor aside? We will gladly send you a technical  credit or issue a formal replacement item in your next shipment. Thank you for your long-term trust and partnership. Please let us know if there is anything else we can assist you with! Update: 6th,July,2026 Again, S4A deeply appreciates your efforts and looks forward to more opportunities to work with you. If need our support, pls contact as below: S4A INDUSTRIAL CO.,LIMITED Contact Sales: Ms Anna Zhang Tel:+86 755 29450011 EXT: 608 Mob/whatsapp/Viber +86 134 10500721 Email: sales1@s4a-access.com

At S4A Industrial Co., Limited, we prioritize not only providing high-quality access control hardware but also ensuring our global partners have the technical support needed for a perfect installation. Recently, one of our valued clients encountered a common installation challenge with theS4A ED100 Automatic Door Opener. After the initial setup, the door was opening with too much force and slamming against the adjacent wall. This is a representative issue that can occur when the default factory settings do not match the specific physical constraints of the installation site.Here is how S4A guides customers to solve this problem to ensure smooth, safe, and professional door operation. The Problem: Door Over-travel and Wall Impact When an automatic swing door slams into a wall, it can cause structural damage to the glass, hinges, or the motor itself. This typically happens because theopening angleis set too wide for the space or thebackcheck speed(the slowing down phase) is not properly calibrated. The S4A Solution: 2-Step Technical Adjustment This is a 90° swing door operator. To adjust the opening angle and prevent the door from hitting the wall, you only need to move the mechanical stop block on the sliding rail to the right. By adjusting the position of this sliding rail stop block, you can limit the maximum opening angle of the door, making it open smaller and softer, so it will no longer bump against the wall. Why Choose S4A Support? With over 16 years of experience in the access control industry, S4A doesn't just sell products; we provide integrated solutions. Whether you are installing magnetic locks, RFID readers, or automatic door openers, our technical team is ready to provide the scripts, manuals, and troubleshooting steps needed to keep your project on track. Are you experiencing a similar installation challenge?Visit our technical resource center at www.s4a-access.com or contact our support team for a step-by-step wiring and adjustment guide.

With 16 years of experience in the access control and security industry, S4A is no longer just a product manufacturer, but a trusted solution partner for its customers. Our core products – from access control panels supporting multi-protocol integration to fingerprint locks that seamlessly integrate with smart ecosystems – can be customized and optimized to meet our customers' individual needs. Our 16 years of industry experience allow us to better understand market pain points and how to create value for our customers with stable and efficient products. Choosing S4A means choosing a worry-free partnership experience.January 2026 has kicked off on a high note for us, as we recently secured a batch of Turnstile gate orders from one of our long-term partner clients. This encouraging start is a true reflection of the steady trust and recognition our Turnstile gate products have gained among our existing customer base.Daily, we receive at least one to two such Turnstile gate orders from our loyal clients—an ongoing testament to the reliability, quality, and performance of our products. These repeat orders not only highlight the strong cooperative relationships we have built over time but also underscore the market’s consistent demand for our Turnstile gates.We remain committed to delivering top-notch Turnstile gate solutions that meet and exceed our clients’ expectations, and we look forward to continuing this momentum of trust and collaboration throughout 2026.Again, I deeply appreciate your efforts and look forward to more opportunities to work with you. If need our support, pls contact as below:S4A INDUSTRIAL CO., LIMITEDContact Sales: Ms Anna ZhangTel:+86 755 29450011 EXT: 608Mob/whatsapp/Viber +86 134 10500721Skype:crypton0908Email: sales1@s4a-access.com

 In response to the feedback regarding slow card enrollment on our TF2 access control device, we've taken immediate and concrete verification steps to demonstrate the product's standard performance. We randomly selected a fully assembled TF2 unit directly from our production line, alongside a normal ready-to-ship unit picked at random from our warehouse—both are 100% representative of our mass-produced TF2 devices that adhere to S4A's strict factory quality control standards (as outlined on s4a-access.com). We captured clear step-by-step photos and footage of the complete user card enrollment process on these two units, showcasing the TF2’s normal, standard response speed during this core operation.  I'm super excited and all set! If you have any questions or need help later on, just let me know right away. I'm here 24/7, eager to help you out and make sure you have a great time! If you wanna know more products or require any additional information, pls kindly contact us as below:S4A INDUSTRIAL CO.,LIMITEDContact Sales: Ms Anna ZhangTel:+86 755 29450011 EXT: 608Mob/whatsapp/Viber +86 134 10500721Skype:crypton0908Email: sales1@s4a-access.com

Welcome to get to know S4A factory! We specialize in manufacturing a wide range of accessories for access control systems and automatic door units. Whether you're looking for cards, access control machines, or software, we've got you covered. Our one-stop procurement service means you can find all the corresponding hardware and software solutions right here, without the hassle of dealing with multiple suppliers. With 15 years of rich experience in production and operation, we have mastered the ins and outs of this field. We are proud to offer OEM and ODM services, tailored to meet your unique requirements. No matter how simple or complex your needs are, we are committed to providing you with high-quality products and professional services.We look forward to building a long - term and mutually beneficial relationship with you!Friendly ReminderPlease be informed of our company’s holiday arrangement for the 2026 Chinese Spring Festival as follows:Our factory will commence holiday from January 31st, 2026Our office will be closed starting February 7th,2026 (team building activities are scheduled for February 5th to 6th);All our business operations will resume fully on February 28th, 2026.During this period, our response to your inquiries may be slightly delayed due to the holiday schedule. Rest assured that we remain committed to serving you: you are welcome to leave us messages at any time, and we will get back to you promptly as soon as we have internet access.Thank you for your continuous support and understanding to S4A and our work. We appreciate your cooperation and wish you a joyful Spring Festival!Best regards,S4A Team

Why do R02 and ITS-AX2 radars only have the normally open and no normally closed functions?Radar systems are usually designed to be normally open because the main function of radar is to detect and track targets. When no target is detected, the radar does not need to send a signal, thus maintaining concealment and avoiding unnecessary energy consumption. When the radar detects a target, it will activate and send a signal, which ensures that detection is only carried out when necessary, improving efficiency and reducing exposure to the enemy.In addition, the normally open design of the radar is also related to its working principle. The radar detects the target by emitting electromagnetic waves and receiving the signal reflected by the target. Suppose the radar system is designed to be normally closed. In that case, that is, continuously sending signals will not be able to distinguish between background noise and signals reflected by the target, thus affecting the accuracy of detection. By keeping silent when there is no target, the radar can more clearly identify the real target signal.Therefore, the normally open design of the radar is to optimize its detection performance and ensure that the target can be effectively detected and tracked while maintaining concealment. This design enables radar to play a key role in military and civilian fields, such as air traffic control, meteorological monitoring, and ocean surveillance.

An Electric DropBolt lock is a security device typically installed within a door and controlled electronically. Here's a brief description of how it might be tested in a workshop setting:Electric DropBolt Lock Testing Procedure in the Workshop:    Visual Inspection: Begin with a thorough visual examination of the lock to ensure there are no visible defects or damage.Mechanical Function Test: Manually operate the lock to test its mechanical components, such as the latch and deadbolt, to ensure they engage and disengage smoothly.Electrical Connection: Connect the lock to a power source and appropriate control system to simulate the electrical operation.Control Signal Test: Send electronic signals to the lock to test its response. This may involve using a keypad, card reader, or other access control devices.Timing and Latching Test: Verify that the lock operates within the specified time frame and that the latch fully extends into the strike plate.Durability Test: Perform a series of open and close cycles to ensure the lock's durability and reliability over time.Security Test: Test the lock's resistance to forced entry, picking, and other potential security threats.Environmental Test: If applicable, expose the lock to various environmental conditions (such as temperature and humidity changes) to ensure it meets environmental resistance standards.Software Functionality: If the lock is connected to a larger access control system, test the software for proper functionality and communication with the lock.Final Inspection: Conduct a final inspection to ensure all components are functioning correctly and that the lock meets all quality and performance standards.Note: It's important to follow the manufacturer's guidelines and safety protocols when testing any electronic lock. Additionally, all testing should be conducted by qualified personnel in a controlled environment to ensure accurate results and safety.

Recently, our valued customers reported a minor defect in our lock Mstrips. To address this issue, we have implemented a new process: all lock Mstrips are now manufactured in advance and stored in the warehouse for two months before assembly. This allows us to meticulously inspect and select any defective lock Mstrips, ensuring that we meet our high standard of satisfying 99.9% of our customers.This approach exemplifies our deep passion for the access control industry. We are committed to solving every problem raised by our customers, finding innovative solutions, and continuously improving our products. This dedication brings a unique sense of accomplishment and drives us to excel in our field. 

Technical Evaluation and Assurance of K80 Access Control Power SupplyWe recently received feedback from one of our esteemed clients regarding the compatibility of our K80 access control power supply with an electric RIM lock. The client expressed concerns about the power supply's ability to adequately power the lock.In response, our team of engineers promptly conducted a thorough diagnostic test, capturing the process in a video for transparency. The test results were conclusive: the electric RIM lock drew an instantaneous power consumption of 58 watts, well within the capabilities of our 5-ampere K80 power supply.Our K80 model is equipped with sophisticated microchip-based protection against overload and overvoltage, ensuring the safety and longevity of connected devices. It is designed to comfortably power 2pcs locks, each with a current draw typical for such devices.However, when the K80 is tasked with powering 4pcs locks simultaneously, it intelligently implements current limitation to maintain stable operation and protect the power supply from excessive loads. This feature is a testament to the unit's advanced design, which prioritizes both performance and safety.We are confident in the performance of our K80 power supply and stand by its ability to meet the power requirements of various access control systems. We appreciate the opportunity to address our client's concerns and are committed to providing reliable, high-quality products that exceed industry standards.