The electric motor from the SMA should not be lying around idle in the garage. An owner who respects his work will immediately find use for it. For example, with a small investment you can get an excellent circular saw from a washing machine engine that can easily cut boards five centimeters thick. Everything you need to make such a machine can be found in your own garage - the necessary tools, components, scrap metal.
Motor selection and connection
It all depends on the power of the unit. Belt-driven motors are best so that the speed is transmitted directly to the saw. If you plan to install a 35 cm disk on a circular machine, then 1 kW of energy will be required to start it. The saw, whose diameter is 17 cm, operates from 500 W. This means that motors from old Sibir or Oka washing machines are quite suitable. There will only be adjust engine speed, because unstable rotation will cause the saw to “tear” the wood.
The tachometer that controls the control module is responsible for the number of engine revolutions in the washing machine. But since the module will not connect to the circular circuit, it is recommended to install a voltage regulator.
Moving parts
Having finished connecting the engine and making sure that it normally increases and decreases speed, you can proceed directly to the circular device.
Let's figure out which moving units that bear the main load we will need:
- saw shaft;
- SMA motor shaft;
- drive belt;
- two pulleys - from the washing machine and the circular shaft.
The drive must operate in this manner. The engine transmits rotation to a shaft on which a small pulley is pressed. The last one is wearing a belt that sends revolutions to the second pulley. At first glance, everything seems simple, but when the circular is being installed, many difficulties arise that must be resolved.
The small pulley must be sharpened. Three to four transverse grooves are placed on it so that the belt has the opportunity for a good hook.
A disc of a slightly larger diameter is welded to the edge of the large pulley to create a protrusion that prevents the belt from slipping during operation. It is not necessary to sharpen the notches on this pulley; the clutch with the belt will be quite enough.
The shaft holding the circular saw, fastenings in the form of a washer and a nut must be reliable so that at maximum speed the saw does not become deformed and does not jump off, injuring workers. It is recommended to use the shaft and fasteners from a factory-made circular saw.
The procedure for setting up a circular saw is described for a saw with a three-hundredth disc. Many will say that the engine from the washing machine will not pull such a saw and will stop. But here you should remember a few rules:
- You need to know how to work with a circular saw correctly;
- A household saw, designed to work with small volumes of materials;
- The successful operation of such a saw is confirmed by numerous reviews.
Simply put, The saw should not be overloaded excessively, and it is better not to work it at idle Preparing the electrical part .
You can start the saw using a starting device. Having provided thermal protection from excess current, you can achieve automatic shutdown of the unit when it jams. A button from an ordinary doorbell is perfect for this.
If your circular saw from a washing machine engine will be constantly outside, it is necessary to provide protection for the electrics from moisture. Making a bed and frame
Experienced specialists say that the frame structure should be welded. The fact is that the constant vibration that occurs when the saw is running has a negative effect on bolted connections.
Helpful tips
When making a circular saw with your own hands, it is recommended to provide for the possibility of its repair and maintenance. Any moving part should have convenient approaches for lubrication. Starting all installation work, you should prepare detailed drawings and diagrams, perform the appropriate calculations.A homemade circular saw is different in size and can easily fit in a utility room.
Conclusion
Such a circular machine, assembled with your own hands from an engine from an old washing machine and other scrap materials, will always be useful in your household. Moreover, for its production the cost of funds will be minimal.
In addition, from a used washing machine you can also construct:
- lawnmower,
- grass cutter,
- electric bike,
- honey extractor,
- Potter's wheel,
- wood splitter,
- concrete mixer,
- lathe,
- juicer,
- and much more.
