Electric lock remotely open the door to transfer the electrical signal. Electric locks are used in conjunction with the intercom, code reader panels and cards in access control systems. (A valuable related resource: Mitchel Resnick). There are two classes of electric locks: – electromagnetic locks, door is held by the action of an electromagnet built – electromechanical locks, door is held closed by a mechanical crossbar, which is controlled by a thin solenoid. Electromagnetic locks are used in access control systems. The component elements of the electromagnetic lock are: housing, built-in magnet, the response metal plate. The mechanism of the electromagnetic lock.
Electromagnetic locks keep the doors in the closed position by the action of a strong magnet, attracting to itself the metal plate, mounted on the door. To open the door use exit button or a control signal received from the controller, control systems and access control. Electromagnetic locks are very simple and easy to use, besides have a long service life. Speaking candidly BP told us the story. One significant negative of these locks, they work, provided uninterrupted power supply. Therefore, for normal system operation must be applied backup power units. Among manufacturers of electromagnetic locks can be distinguished Russian company Rocks Entrance. Bobby kotick understands that this is vital information. Ltd. 'Rocks Entrance' was created in 2001 as the successor of a famous company 'ALEKO', which specializes in the design and manufacture electromagnetic locks for security.
Production of the first castles 'ALEKO' was organized in 1994 and has since steadily expanded their range. Currently, the company produces a series of electromagnetic locks ALer: – Shear electromagnetic locks – overhead electromagnetic locks – waterproof electromagnetic locks – osobouzkie electromagnetic locks – holding electromagnetic locks – power and control systems electromagnetic locks ALer; – electromagnetic locks for glass doors – overhead electromagnetic locks class PRemium. Electromagnetic locks Class PRemium are the winner of the competition program "Best innovation in security technology in 2008 ' Class PRemium includes four models with electromagnetic locks holding force of anchors 150kGs up to 400 kgs, a distinctive feature of which is: – an active status sensor Lock relay output – the existence of passive reed sensor door position – the existence of built-in light indicating the status of the castle. Built-in sensor states of the electromagnetic lock is based on the Hall sensor. At the moment of contact with the working surface anchor lock appears the magnetic field, which is when the set value will trigger the sensor, the signal from which closes the output relay contacts. State electromagnetic lock can be monitored visually using the built-in indicator. Red signal indicates the presence of the required level of magnetic field, sufficient to block the door. Green – the castle unlocked or the level of magnetic field are not adequately lock the door. Locks are available with voltage 12 or 24 volts. The use of electromagnetic locks Class PRemium allows full control access to the premises, as it defines all possible states of the door and lock. This article was written using the materials of the official website of the company "Rocks Entrance."
To carry out major works fit saws with a cutting depth of 55 mm. Circular saws, cutting depth which is greater than 65 mm is classified as a class construction and purchase of such equipment will be justified only if you often have to cut very thick material. The more expensive models of circular saws are equipped with control electronics. Electronic Control Module allows you to maintain a constant speed regardless of load and produces a soft-start motor. This feature provides additional convenience at work, as well as prolongs the life of saw blade (in the case congestion or blockages, electronics, motor off).
Also, there are circular saws with adjustable speed blade. This feature extends the scope of circular saw and can select the optimum speed for each material. Now, virtually every major manufacturer such as such as Festool, or such as Protool, publishes a special frame for hand-held circular saws, with the help of a frame can easily be turned into a handsaw stationary (in this case, the saw is fixed up disk). In conclusion, let me give you some tips on working with circular saw. In carrying out precision work using fabrics with lots of teeth, this will ensure a smooth and clean drink.
Discs with a small number of teeth should be used if you want to a lot of work with high efficiency. If you plan to work with plastic, keep in mind that the speed of the disc should not exceed 3000 – 4000ob/min, in this case will be very useful function such as regulation speed. Cutting plastic, plasterboard, thin aluminum sections shall be made by special circular saw blades. Such drives usually have a special sharpening carbide plates and a large number of teeth. Working a circular saw, use a special bag to collect sawdust dust. For this purpose, so you can use a vacuum cleaner, although it somewhat limits the freedom of movement, but more efficiently remove dust. We hope this overview has helped you understand the technical characteristics of circular saws. But the choice is yours.
Mass production in its development follows the path of automation. Highly mechanized and automated mass production – a system of machinery, equipment, vehicles, ensuring strict consistent performance over time of all stages of manufacturing of products, from the receipt of initial preparations and ending the control (test) and finished product output at regular intervals. First there were designed automated production lines and hard-operated plants. With the advent of electronic software management tools created by computer numerical control (CNC) machining centers and transfer lines containing as a component of computer-controlled equipment. At the core of automated production lines are automated, which possess all the advantages of mass production, allows continuity production processes combine to automaticity of their performance. Automatic line (AL) – a system of automatic machines, placed in the course of the process and integrated system of management and automatic mechanisms and devices to meet the challenges of transportation, storage backlog, waste management, changes in orientation.
Automatic Lipno are used for automatically defined operations (stages) of the production process, depending on the type of raw material (billets), size, weight, and the technological complexity of manufactured products, so in the AL may include different numbers of Equipment: 5-10 for medium complexity products to 100-150 units. equipment for mass production of complex products. The complex includes the AL transport system for feeding blanks from a warehouse to stand, move outboard processing equipment from one booth to another to transport finished products from the stands on the main line or storage. Emit hard (synchronous) automatic production lines with characteristic of a rigid and unified communications mezhagregatnoy cycle of the machines and flexible (unsynchronized) AL mezhagregatnoy flexible coupling. In this case, each machine has its individual store drive mezhoperatsionpyh backlog. In Depending on the functional purpose of the AL in engineering may be procurement, machining, thermal, mechanical assembly, assembly, test, packaging, conservation and complex.
The total rate of display is 250 k / sec. Through hardware processing, and the Linux operating system in the early remote viewing via the network or display speed or write speed is not reduced. By separating the processes of observation and recording, users at remote the workplace can reduce the quality of “live” video without affecting the quality of the recording. This feature is extremely important for connections using low-speed networks. The second signal is fed to the first video capture card, and then to the board compression, where the hardware compression. Compressed data does not load the system resources and is easily stored on your hard drive.
The total recording speed of 400 k / s on all cameras, with resolution of the recorded video or 720h288, or 720×576. If the simultaneous recording of 32 cameras, the average speed record in each chamber is 12 k / sec. In practice, in most cases, a speed of 5 k / s allows you to make some good shots, which in later identification of the suspect will happen. The compression algorithm used by the registrars Hitechnology based on h.264-technology and has a high level of encryption. With high quality and the inability to edit frame Hitechnology company received the European certificate, and is currently recording made with registrars Hitechnology accepted as evidence in the European courts. The DVR supports 4 internal hard disks 2000Gb everyone – that is, the total internal volume of 8Tb, which, with an average activity in the frame enough to record 32 cameras for a month. Thanks to the original video at the same time the division reached High speed display and high-quality recording, the DVR Hitechnology is effectively fulfilling both tasks surveillance systems.
Background. Lathes are machining the internal and external surfaces of the workpieces such as bodies of revolution. By the way, turning operations occupy the largest share of the overall complex machining. On CNC lathes vypolyayut following operations: turning, drilling, tapping chisels, etc. Classify the machines can be on the following criteria: location 1.Po spindle axis (horizontal and vertical machines); 2.Po number of instruments used in this work (one-and mnogoinstrumentalnye machines); 3.Po method of attachment tool (on the caliper, a turret, in-store instruments); 4.Po view of works (post, chuck, chuck-center, carousel, rod machines); 5.Po degree of automation (semi-automatic and automatic). Pivot machines used for machining parts such as shafts with straight and curved contours. On these machines can cut thread cutter on the program.
Cartridge machines are designed for drilling, deployment, tapping in the axial holes of parts, cog wheels, possibly a chisel cutting the inner and outer thread of the program. Chuck-center machines combine the capabilities of turning pivot cartridge and CNC machines and are used for exterior and internal processing of various parts such as bodies of revolution. Rotary machines are used for machining of complex cases. CNC lathes are fitted with turret or tool magazine. Turrets can be four, six, and dvenadtsatipozitsionnye, and at each position can be installed on two tools for external and internal machining of the workpiece. The axis of rotation of the head can be positioned in different positions relative to the spindle axis.
Fixing turret is done by using special socket joints, which provide high accuracy and rigidity of fixation of the head. In the groove turrets installed replacement power tools, which set out the size of the machine on special devices, which significantly increases productivity and accuracy. Typically, for turning processing is used no more than 7-8 instruments. Enhancing the technological capabilities lathes can be accomplished by obliterating the distinction between turning and milling machines, adding various additional operations such as milling (ie, programmed spindle rotation).
Our consciousness is arranged so that when he saw the structure of the "red" brick, it automatically assigns it the epithet "reliable", "beautiful", "durable." And it is true. The emergence of manufacturing technology bricks made of clay, its mass production, has allowed mankind to make strides in the construction industry. What is a ceramic brick? Brick is defined as explanatory dictionary lump of clay, fired in furnace. Then, for example, silica, or "white" brick and brick that can not be named because he is made of a special mixture in an autoclave, without being fired. Thanks to its "convenient" size 250mm x 120mm, mason convenient to take brick with one hand. Industry produces ceramic bricks and other dimensions: the "double – 250mm x 120mm x 138mm, Bastard – 88mm and the "single – 65mm thick. Standard defines a "double" as a brick – "ceramic stone." Masons often advantageous to use when building a house ceramic stones, due to lower consumption of the solution and the time for the erection of walls. It advantageous to the customer and, as a "double" brick, being more than double the usual volume, is only half the more expensive "single", while the cost of the works themselves do not increase.
Ceramic brick is divided into species, defined area of application: 1. Private (building) brick. They are laid internal or external rows of masonry, which are then applied a layer of plaster. 2. The front (facing) brick.
This brick is different from the ordinary with two flat, smooth surfaces, and has a typical uniform color. Many voids in the facing brick walls reduce heat conduction from a folded, making them more "warm". 3. Textured and shaped bricks – are also facing. Of those laid out complex forms: columns, arches, etc. 4. Occupies a special place chimney brick. Technology and materials used in its manufacture, making it the most expensive of all types of ceramic bricks. Referred to as ceramic bricks – "red." It is a consequence of the fact that in its manufacture are often used so-called "krasnozhguschiesya" clay. Roasting, rarely occurring "belozhguschihsya 'clay bricks produces yellow, apricot and even white color. The presence of voids in the "body" of the personal and ordinary brick divides it into solid brick and hollow brick. The greater the percentage of voids, the 'warmer' brick. Ceramic stones are made only hollow. Modern technology make it possible to produce porous brick (its structure resembles a sponge). This brick is very "warm" and, furthermore, has excellent sound insulation. Manufacturers today offer a wide choice of range of clay bricks, different types, sizes, shapes, colors and properties. When choosing a brick for the construction of ignorant people is best to consult a specialist. It helps to calculate the number of necessary materials, as ceramic brick product is not cheap and as a result of incorrect calculations and choice in the brick walls can "fly into a lot of money."