P8 Full Color Outdoor Rental LED Screen With High Perfermence
1.; Extremely close view distances and wide view angles.;
2.; Silent operation,; little heat generated (no fans);.;
3.; Standard panel design makes stocking,; transportation,; construction,; spare parts and maintenance easy and simple.;
4.; Lightweight and seamless,; precision extruded aluminum section structure.;
5.; Real white,; brilliant colors,; breathtaking grayscale.;
This Full Color Outdoor LED Display is perfect for:;
Corporate Meetings and Parties
Super Sales Events
And Much,; Much More! ! !
|LED Type||SMD 3535|
|Pixel / Unit||80×80|
|Viewing Angle||H160 degree V160 degree|
|Application||Storage-40~60° C,; Working-20~50° C|
|Power Consumption||980W/sq.;m Max|
|Frame Refresh||≥ 60Hz|
|Data Refresh Rate||≥ 2,; 000Hz|
|Power Supply||AC90-240V,; 50~60Hz|
|MTBF||≥ 1,; 000 Hours|
|Life Span||≥ 50,; 000 Hours|
|Pixel Failure||< 0.;0003|
1.; What is the led chip packing?
SMD3535,; SMD2727/2X3 Array module
2.; How to protect power supply?
Electrical peaks can put more force on the electrical components which will decrease life time .;
it is wise to install a protection (voltage stabilizer); that can control the peaks.;
3.; What is the return policy?
If the module died exceed 1%,;we can resend you the new one.;
4.; What is Drive Method,; driving IC and Power supply
Drive Method:; always we use static,; 1/4 scan,; 1/8 scan,; 1/16 scan,; the latter 1 contributes to less brightness than the former.; We always use the static outdoor,; and use the different kinds of scan indoor.;
Driving IC is the generic term for several kinds of IC,; that are used to control the LED lamps,; and as a bridge between the control system and lamps.;
Power supply:; a kind of device that used as a transfer from 220V AC into 5V DC.; It always seems like a box in the cabinet.;
5.; What is viewing angle?
Viewing angle is the maximum angle at which a display can be viewed with acceptable visual performance.; It includes horizontal viewing angle and vertical viewing angle.;
6.; May I know the Minimum order for your products:;
For our products,; no limit for the size of the led display screen,; but generallay speaking,; 1 screen the dots more than 50000 dots will be clear for the audience to see the video on the screen.;
7.; How long time I can get the cargos?
Our production time is about 12-15 working days;
When we confirmed the order,; after we get your deposit,; we can start production,; we will update the production details in time; Before finish,; we will notice you and after we get full payment,; we can delivery the goods to you.;
About the time from start port to destination,; that depends on the distance and the state of the sea company or airport company.;
8.; How I can make payment?
Dear customer,; if you’re interested in our products and want to make order with us,; please send us an inquiry,; our staff will contact you within 3 hours in working time.;
We support T/T,; West Union,; L/C,; ect.;
And about payment,; we need you pay us at least 30% as deposit,; for the rest part,; before delivery.;
Why Choose us?
BST has a perfect service system,; including pre-sale service,; in-sale service and after-sale service.; To provide high quality service for our customers,; we train every salesman with necessary product maintenance knowledge and organized a Technology Supporting Department with a group of excellent and professional engineers.; Any problem you can contact us at any time you like.;
1.; Reply enquiries in 24 hours.;
2.; Market research and forecast for customer.;
3.; Provide unique and professional solutions based on customer’s requirement.;
4.; Data sheet and samples offer.;
5.; Other services,; such as special packing design,; factory visiting and so on.;
1.; Tracking report in producing.;
2.; Quality test report for every order.;
3.; Photos and videos as per customer’s requirement.;
4.; Free spare parts.;
1.; Lifetime free maintenance and upgrade.;
2.; Complaint respond period not exceed 24 hours; maintenance guidance and problem solution supplied in 48 hours.;
3.; Customer satisfaction tracking report.;
4.; Free technician training.;
5.; Full set of documents free of charge,; which including installation guidance,; software operation manual,; easy maintenance manual and control system software CD and so on.;
6.; Special service for big project,; such as stadium,; exhibitions,; squares and so on.;
How to Choose the Right Worm Shaft
You might be curious to know how to choose the right Worm Shaft. In this article, you will learn about worm modules with the same pitch diameter, Double-thread worm gears, and Self-locking worm drive. Once you have chosen the proper Worm Shaft, you will find it easier to use the equipment in your home. There are many advantages to selecting the right Worm Shaft. Read on to learn more.
The concave shape of a worm’s shaft is an important characteristic for the design of a worm gearing. Worm gearings can be found in a wide range of shapes, and the basic profile parameters are available in professional and firm literature. These parameters are used in geometry calculations, and a selection of the right worm gearing for a particular application can be based on these requirements.
The thread profile of a worm is defined by the tangent to the axis of its main cylinder. The teeth are shaped in a straight line with a slightly concave shape along the sides. It resembles a helical gear, and the profile of the worm itself is straight. This type of gearing is often used when the number of teeth is greater than a certain limit.
The geometry of a worm gear depends on the type and manufacturer. In the earliest days, worms were made similar to simple screw threads, and could be chased on a lathe. During this time, the worm was often made with straight-sided tools to produce threads in the acme plane. Later, grinding techniques improved the thread finish and reduced distortions resulting from hardening.
When a worm gearing has multiple teeth, the pitch angle is a key parameter. A greater pitch angle increases efficiency. If you want to increase the pitch angle without increasing the number of teeth, you can replace a worm pair with a different number of thread starts. The helix angle must increase while the center distance remains constant. A higher pitch angle, however, is almost never used for power transmissions.
The minimum number of gear teeth depends on the angle of pressure at zero gearing correction. The diameter of the worm is d1, and is based on a known module value, mx or mn. Generally, larger values of m are assigned to larger modules. And a smaller number of teeth is called a low pitch angle. In case of a low pitch angle, spiral gearing is used. The pitch angle of the worm gear is smaller than 10 degrees.
Multi-thread worms can be divided into sets of one, two, or 4 threads. The ratio is determined by the number of threads on each set and the number of teeth on the apparatus. The most common worm thread counts are 1,2,4, and 6. To find out how many threads you have, count the start and end of each thread and divide by two. Using this method, you will get the correct thread count every time.
The tangent plane of a worm’s pitch profile changes as the worm moves lengthwise along the thread. The lead angle is greatest at the throat, and decreases on both sides. The curvature radius r” varies proportionally with the worm’s radius, or pitch angle at the considered point. Hence, the worm leads angle, r, is increased with decreased inclination and decreases with increasing inclination.
Multi-thread worms are characterized by a constant leverage between the gear surface and the worm threads. The ratio of worm-tooth surfaces to the worm’s length varies, which enables the wormgear to be adjusted in the same direction. To optimize the gear contact between the worm and gear, the tangent relationship between the 2 surfaces is optimal.
The efficiency of worm gear drives is largely dependent on the helix angle of the worm. Multiple thread worms can improve the efficiency of the worm gear drive by as much as 25 to 50% compared to single-thread worms. Worm gears are made of bronze, which reduces friction and heat on the worm’s teeth. A specialized machine can cut the worm gears for maximum efficiency.
Double-thread worm gears
In many different applications, worm gears are used to drive a worm wheel. These gears are unique in that the worm cannot be reversed by the power applied to the worm wheel. Because of their self-locking properties, they can be used to prevent reversing motion, although this is not a dependable function. Applications for worm gears include hoisting equipment, elevators, chain blocks, fishing reels, and automotive power steering. Because of their compact size, these gears are often used in applications with limited space.
Worm sets typically exhibit more wear than other types of gears, and this means that they require more limited contact patterns in new parts. Worm wheel teeth are concave, making it difficult to measure tooth thickness with pins, balls, and gear tooth calipers. To measure tooth thickness, however, you can measure backlash, a measurement of the spacing between teeth in a gear. Backlash can vary from 1 worm gear to another, so it is important to check the backlash at several points. If the backlash is different in 2 places, this indicates that the teeth may have different spacing.
Single-thread worm gears provide high speed reduction but lower efficiency. A multi-thread worm gear can provide high efficiency and high speed, but this comes with a trade-off in terms of horsepower. However, there are many other applications for worm gears. In addition to heavy-duty applications, they are often used in light-duty gearboxes for a variety of functions. When used in conjunction with double-thread worms, they allow for a substantial speed reduction in 1 step.
Stainless-steel worm gears can be used in damp environments. The worm gear is not susceptible to rust and is ideal for wet and damp environments. The worm wheel’s smooth surfaces make cleaning them easy. However, they do require lubricants. The most common lubricant for worm gears is mineral oil. This lubricant is designed to protect the worm drive.
Self-locking worm drive
A self-locking worm drive prevents the platform from moving backward when the motor stops. A dynamic self-locking worm drive is also possible but does not include a holding brake. This type of self-locking worm drive is not susceptible to vibrations, but may rattle if released. In addition, it may require an additional brake to keep the platform from moving. A positive brake may be necessary for safety.
A self-locking worm drive does not allow for the interchangeability of the driven and driving gears. This is unlike spur gear trains that allow both to interchange positions. In a self-locking worm drive, the driving gear is always engaged and the driven gear remains stationary. The drive mechanism locks automatically when the worm is operated in the wrong manner. Several sources of information on self-locking worm gears include the Machinery’s Handbook.
A self-locking worm drive is not difficult to build and has a great mechanical advantage. In fact, the output of a self-locking worm drive cannot be backdriven by the input shaft. DIYers can build a self-locking worm drive by modifying threaded rods and off-the-shelf gears. However, it is easier to make a ratchet and pawl mechanism, and is significantly less expensive. However, it is important to understand that you can only drive 1 worm at a time.
Another advantage of a self-locking worm drive is the fact that it is not possible to interchange the input and output shafts. This is a major benefit of using such a mechanism, as you can achieve high gear reduction without increasing the size of the gear box. If you’re thinking about buying a self-locking worm gear for a specific application, consider the following tips to make the right choice.
An enveloping worm gear set is best for applications requiring high accuracy and efficiency, and minimum backlash. Its teeth are shaped differently, and the worm’s threads are modified to increase surface contact. They are more expensive to manufacture than their single-start counterparts, but this type is best for applications where accuracy is crucial. The worm drive is also a great option for heavy trucks because of their large size and high-torque capacity.