Bulgarian or angular grinding machine is a very useful tool in the farm with various surfaces. Such a tool fundamentally facilitates many tedious processes. With it, you can handle, pollute or crop metal, wooden, stone or plastic materials. Most modern Bulgarians are originally equipped with a smooth start function. What is the benefit of this function?
Features and destination
What is the function of a smooth start? The reason is that when the grinder is turned on, a large voltage is dramatically. It extremely negatively affects the tool electronics, and also wear wiring. It is sharp voltage jumps that most often and remove the grinder of. In addition, with a sharp start, it is quite difficult to keep the tool in the hands, because it begins to shake and lead to the side. All this can lead not only to the tool breakdown, but also to injury. That is why most manufacturers provided their models with a function of smooth start and adjusting turns.
The function of adjusting the revolutions is useful in that various types of work can be performed by such a grinder. The speed of rotation of the disk is selected depending on what needs to be made – to polish, polish or crop material. The speed of rotation of the disks can affect the cutting of the surface. For example, for solid surfaces, a high speed of rotation of the disk is needed, and for a softer, on the contrary – low speed. The grinding work is very difficult fully without a circle rotation speed regulator.
It is extremely important to remember the safety, working with a grinder. This is a traumatic device, so the negligence in handling it is unacceptable. It is necessary to work in a protective mask, gloves and hard to keep the grinding machine with two hands so that it does not slide from the treated surface.
On modern grinding machines, the functions of a smooth start is already installed, but some masters independently supply their grinders with a smooth start device. In principle, put the limiter not so difficult.
You can purchase ready-made devices for a smooth start, and you can make such an appliance yourself. Below is one of the most famous schemes for the device for smooth starting tool.
So, for the manufacture of a smooth start system will be needed:
- microcircuit – kr1182pm1;
- R1 – 470 Ohm R2 – 68;
- C1 and C2 – 1 microfarad – 10 volts;
- C3 – 47 microfarad – 10 volts.
The essence of such an apparatus is the following characteristics.
- When the device turns on, the voltage from the network begins to enter the microcircuit (DA1).
- Then the control condenser begins to gradually charge. After that, the device comes to the desired voltage indicator. For this reason, thyristors open in a microcircuit with a small delay. A period of such delay depends on the time that the condenser is fully charged.
- Simistor VS1 will open too gradually. This is because it is also under the control of thyristors.
These processes are carried out by periods that gradually become less. And for this reason, the voltage that is served on the engine of the Bulgarian, it grows not with jumps, but gradually. Thanks to this, Bulgarian turns on smoothly.
Cap capacitor C2 directly affects the time for which the engine is completely starting to work. Condenser, which has a capacity of 47 μF, starts the device in about 2-3 seconds. And at the moment when the Bulgarian turns off, the discharge of the C1 capacitor is carried out using a resistor R1 by 60 com. This happens about the same time as the inclusion. Then the tool can be launched again for further work.
This unit can be connected to any device that is designed to voltage at 220 V. The basis of this device is a microcircuit and simistor. The main thing is that the minimum strength of the SIMISTOR current is 25 A, and its maximum voltage would be 400 V. This scheme is collected on the printed circuit board. The fee must be divorced as compact.
Tips for choosing
How to choose the ush? To do this, it is worth using several basic criteria.
To select a suitable tool, it is worth determining the specific type of work to be done by this tool. Bulgarians can be different types: Network, with batteries, gasoline and pneumatic.
Network models are probably distributed most. Such brotanks work from the home network, that is, from a simple outlet. Such tool models have high power, compactness and high speed of rotation of cutting disks.
But the restriction in working with such a grinder is associated with the dependence on the mains. For example, when working on the street is not always nearby there is a socket and have to use various extension cords.
Rechargeable devices are deprived of this minus. They have a special fastening for power supplies, which are charged from the power supply. After charging, it is possible to work with such a tool without any wires. Typically, such bulgarians have compact dimensions and small diameters of cutting discs. As a rule, such models are more expensive than standard tools. Also, the period of their operation is limited to the capacity of the power supply.
Bulgarian gasoline models are infrequent. Such instruments are distinguished by large dimensions, because they need a tank for fuel, as well as an internal combustion engine. Among the advantages It is worth highlighting the high power of these models, a wide range of disc choleering and autonomy. Negative aspects include their weight and bulk, high noise level and, of course, additional costs for fuel for the device.
Pneumatic USM models are often used in production purposes and very rare for household work. These are unusual grinders that work from the stream of compressed air, need a special compressor. Such models completely excluded the problem of overheating, and the period of operation can only be limited to human factor. Also, such models are the lightest and silent.
For simple work on processing and grinding surfaces, light models of grinding machines with a small diameter of the cutting circle will be suitable. For work on cutting durable materials it is worth selecting more powerful and, accordingly, bulky equipment with a large diameter of the disks. Diameters of discs can be from 125 (minimum size) to 230 (maximum size) mm – that is, the size range is quite wide. The universal diameter of the cutting disk is 180 mm. Such a circle can and process surfaces, and cut the material.
When choosing a disc is worth a careful visual inspection. Even small damage and chips can lead to extremely sad consequences. By the way, almost 90% of accidents when working with a grinder occurs due to the fault of the defect on the cutting disks.
Also important criteria for choosing is the convenience of work. Bulgarian must be equipped with comfortable handles, should not slip out of the palm and have a big weight. Many Bulgarians have an electronic relay to protect against voltage and overload jumps. This is a useful feature, so it is worth choosing a tool with such a fuse.
It is recommended to select models with a smooth start function. This will help the tool to serve a much larger time, and use the grinder with such a function is much more convenient and safer.
How to connect?
If you need to connect the function of a smooth start to the grinder with your own hands, then it is necessary to do it through an adapter. Input Conductor Contacts You need to connect to the rectifier block. The correct definition of zero phase plays an important role. Contacts Devices are fixed using a soldering lamp. In order to test the device’s performance, you must use a special tester.
Among other things, the grinding regulator is really placed immediately in the outlet. From her and will work the tool. Connection requires a junction box, socket and a conventional network cable. In the junction box, you need to make a hole (you can drill) to insert an AC regulator to it. The board is placed inside the box, and the socket is attached to it. This controller is applicable not only for the grinding machine, but also for any device that will connect to this outlet.
It is important to remember that these works are associated with high voltage. Therefore, it is extremely important to comply with safety equipment to avoid accidents.
So, it was discussed above, for which purposes in the grinders there is a function of a smooth start and the revolver regulator of the cutting circle. Usually in modern tools, these functions have already been built in, but if they are missing, with a large desire, you can install them and connect themselves.
About how to make a smooth start for a grinder, look in the video below.