Circular saw with your own hands from the engine
Making a circular saw with your own hands
The need to have a small circular machine on hand must have occurred to everyone who, at least once, tried to make a straight cut with a jigsaw or a hand saw of a small plank or strip of laminate. It’s another matter when such an operation is performed on a stable machine. Even if this circular was assembled from metal with its own hands and does not look very presentable, but this wood machine allows you to do the job faster and better. That’s just how to assemble the circular yourself at the lowest cost and use the available parts at the same time, for example, the engine from the washing machine?
Circular saw device
The circular saw device, like most stationary machines, consists of the following main parts:
- Bed or base;
- Motor. most often it is an asynchronous electric motor;
- Belt drive. pulleys and transfer belt;
- Circular saw working shaft;
- Security devices;
- Electrical equipment.
The entire layout of the device is based on a massive bed or base. It can be a one-piece part cast from cast iron aluminum, or it can be in the form of a frame. a body assembled from scraps of pipes or corners. Homemade machine, it is preferable to make from cuttings of profile pipes, for example, you can use square profile pipes 25×25 mm or rectangular profile 20×40 or 25×50.
The spindle for mounting the circular saw blade is used as a thread on the shaft. In this case, the saw is clamped with a nut. The spindle assembly can be made in another way, as with a hand-held circular saw, drill a hole in the shaft, cut the internal thread and clamp the disc with a bolt. But as practice shows, the first option is better. the circular saw is clamped more reliably, and the thickness of the blade can be selected differently.
When using a belt drive, the electric motor and the working shaft are connected by a V-belt. The rotary motion from the motor shaft is transmitted through the pulley to the working shaft pulley. It is recommended to design a circular sawing machine according to this scheme, this will increase the resource of the motor and eliminate the possibility of jamming. If the circular disc gets stuck and it stops, and the belt just stretches, and the engine continues to run.
The working table is necessary so that the workpiece is in the same plane during operation. The circular table is made as wide as possible, so that you can safely rest the part on its plane.
In order for the woodworking circular saw to be safe, devices must be installed to ensure the safety of work. This can be a protective cover, a pusher for working with small parts, a parallel stop.
One of the options to assemble a simple budget machine for homework is the option of converting a manual circular into a stationary one, adding a bed and a wide working surface to the actually finished device.
DIY Tool | Make An Adjustable Table Saw From Motor | How To Build A Table Saw Without Circular Saw
The engine already has a pulley. This is a standard pulley used in a washing machine.
Elongated engine casing studs will be used as attachment points. The standard studs were replaced with longer ones with M8 threads. Brackets are made of 60×60 mm angle. Holes were drilled at the point of attachment to the engine, and a slot was made at the points of attachment to the bed to adjust the belt tension.
It was no coincidence that the frame was made of a shaped tube. The design uses a profile of 20×20 mm and 25×25 mm.
Such a frame has turned out to be strong and stable. The side racks are made the same. They are connected at the bottom with a 25×25 profile, and at the top there is a jumper made of a pipe with a section of 20×20 mm. The resulting frame of the table circular is raised above the surface on plastic legs, this increased the stability of the instrument. Bolts for fastening the engine are installed on the lower jumpers.
The working shaft attachment is made of a nut. The inner thread of the nut is ground down, the diameter corresponds to the outer diameter of the shaft bearings. To fix the bearings, a retaining ring will be used, under which a groove is made.
Do-it-yourself miniature machine from an engine from a washing machine
But as for the engine from the washing machine, then this is perhaps one of the best motor options for assembling a circular saw at home. Washing machine motors have a long service life and endurance. Low shaft revolutions are fully compensated by the design. in most washing machine engines there is a groove for the pulley key, and the body itself has convenient mounting holes. You can increase the number of revolutions of the saw blade by installing pulleys of different sizes on the motor and the working shaft, or take an electric motor from the centrifuge of the same washing machine. By the way, a machine with a direct drive can be made from a centrifuge motor, such a motor usually has a long shaft, and a small-diameter saw can be installed directly on it. \
But the main advantage of the engine from the washing machine is its power. It is designed for a long period of work, and for a circular saw this is the most important thing.
A sheet of metal with a thickness of 2 mm will be used as the tabletop of the desktop in the circular. This is enough for the workpiece to move freely on the work table.
Holes are made in the metal for mounting countersunk head screws. In addition to metal, chipboard can also be used as a table, and it can be made from plywood. It is recommended to make the working table of the circular so that it is possible to install an emphasis on it.
Main units, materials, tools
The algorithm for creating a circular saw with your own hands is quite simple. First, you need to determine for what purpose the circular will be used. If this is a small portable machine for working with laminate and plywood, then here it is worth thinking about a device from a hand-held circular saw, and if you have more ambitious tasks, then it is better to think about a more reliable engine and impressive dimensions of the machine.
In any case, you will have to make drawings of the device in order to calculate how and where the equipment will be installed, how the main parts will be attached, and at the same time think over what tool you need to work.
For a small portable circular saw from a hand saw, you can use the popular plywood or chipboard body assembly pattern. Well, if you plan to use a belt drive and a motor from a washing machine, then you will need a tool for working with metal. Welding work is indispensable here.
Other types of circular saws
Circular saw bearing assembly diagram.
You can make a circular saw of the pendulum type. This type of saw is intended for sawing thick woods. In pendulum devices, electric motors with increased power are used, the torque from which is supplied to the saw shaft through a belt drive system.
The frame of a circular pendulum saw must be very powerful and is made of thick steel channels. This is due to the fact that it will bear the entire cutting and rotating load of the mechanism. over, this model can be equipped with a saw blade lifting device.
But large and serious sawing devices are not always required. In this case, a mini circular saw is a good solution. Mini circular saw allows you to work on site, while it is possible to cut at different angles.
The presence of such a sawing mechanism will save the space used in the workshop. At the same time, you can easily move it around the entire free space of the room. The presence of such a device will help to simplify all repair and construction work. And the quality of the cut produced will be of a fairly high level.
Mini device assembly
Before you start making a mini-saw, you need to prepare the floors in the workshop. The floor in the room should be level so that the saw does not swing during operation, because it does not have a heavy bed. The swinging mechanism will not only interfere with the work process, but can also lead to the appearance of various kinds of injuries.
Any old table and metal trestle can be used as the bed of the mini-device. These elements must be connected to each other using a thick board (40-50 mm).
Also, the table top can be made from 2 steel plates, the thickness of which is 4-5 mm. Thick bars are also good for this, which need to be connected to each other with a plywood lintel 25 mm thick. A gap of 10-15 mm should be left between the sheets / bars, it will be needed for the saw blade to pass.
Performing these works, you should achieve a flat surface and parallelism between the inner edges of the plates. In this case, the mechanism must be fastened in such a way that the circular saw is in the middle of the prepared gap.
To attach the sawing element to the table, it is necessary to drill holes on its surface. Using bolts, you need to make it securely fastened.
Do-it-yourself saw assembly
The circular saw is designed for sawing logs or various wood products. The thickness of the cut material will depend on the power of its electric drive, i.e. the higher it is, the thicker the product can be cut. It is possible to increase the performance of the saw not only with a powerful engine, but also by installing a camshaft.
Any circular saw consists of 2 parts. upper and lower. In the upper part there is a work table, a saw blade and a shaft with a pulley. All electrical equipment is installed at the bottom of the device. This equipment includes:
It is better to make the frame of the cutting mechanism from metal corners 25×25 mm or 30×30 mm. The dimensions of the working table should be 650×450 mm, in the corners of which pipes with a diameter of 18-20 mm must be welded.
On the prepared frame of the mechanism, 2 small corners should be fixed, the length of which should be 20-30 mm, and the distance between them will be determined by the dimensions of the shaft. These corners will help fix the bearings, for which you need to use clamps.
To improve the smoothness of the saw and improve the quality of work, it is necessary to use sealed bearings. This prevents chips and sawing waste from clogging the bearing race.
The lower part of the sawing mechanism must be made massive, this will increase its stability and reduce vibrations that occur during operation. For these purposes, corners are best suited, the section of which is 40×40 mm or 50×50 mm. To mount the electric motor, you need to install 2 transverse corners.
Circular saw table layout with lifting-lowering mechanism.
It is better to use a three-phase asynchronous motor itself, the power of which will be 1.5-2 kW, and the maximum number of revolutions is 2000 rpm. A pulley should be placed on the motor shaft, the groove of which is 80-100 mm, it will allow the use of a wide and reliable belt.
A small steel plate should be welded onto the upright of the bed. The trigger will be attached to it. Its wires must be laid carefully so that they do not catch on the motor shaft.
Then the lower and upper parts of the saw must be connected together; this can be done using pipe sections of the appropriate diameter. They must be drilled in advance on 2 sides. Bolts are inserted into these holes, which will tighten the entire circular saw mechanism.
After both parts are connected, you need to tighten the belt. The tension should not be very strong, otherwise it will lead to its rapid rupture. The starting mechanism must be equipped with capacitors that will help smooth out the increased starting currents. To increase the torque and output currents, you can use a 500-600 W transformer.
How to make a mini circular saw with your own hands?
During repair work, you may need a circular saw, which will help to make high-quality sawing of the required surface. Such a tool is rarely required, and it is not cheap. To save your own savings, you can assemble the saw yourself. A do-it-yourself circular saw will help you easily solve all the issues that arise during construction / repair.
Homemade circular saw design.
Engine installation and completion of work
A torque transmitting device should be provided to mount the hand saw motor. In some cases, circular saws can be installed directly on the motor shaft, but this will reduce the power of the entire device.
As such a mechanism that transmits rotation, you can use a spindle from the carriage mechanism of a bicycle. It must be cut off with a hacksaw for metal. An asterisk will also be required in further work.
The spindle needs to be equipped with an adapter sleeve, which will allow the cutting disc to be firmly attached to it. The sleeve must be attached in several places, this can be done by welding. A metal plate with a thickness of 5-6 mm is attached to the resulting spindle assembly. It is required to install a sprocket on the disk shaft, the size of which will be 2 times smaller than the spindle on the spindle. Then these sprockets are connected by a chain. You can use a regular bicycle chain for this. Now the mini circular saw can be considered ready and start to use it.
A circular saw made in this way with your own hands will be very convenient and useful.
In order to make a mini circular saw, you need to show a little imagination and ingenuity.
All assembly work will not take much time. The resulting mechanism will speed up repair work and save money.
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On the right side, two L-shaped brackets made from the same corner as the racks are attached to the frame posts with M10 bolts. The upper parts (shelves) of the mounts serve as supports for the lifting part of the desktop. A groove is cut in his plate for a saw blade (as it is also called a cutting-off emery wheel).
Longitudinal grooves are made in the arms of the bracket, allowing the arms to be raised (together with the sawing table plate) and to overlap the “overhang” of the saw blade above the table surface (from approximately 160 mm to virtually 0).
Make a stretch ceiling with your own hands now it’s easy
The other two parts of the table. planing (feeding and receiving). are mounted on a frame on adjustable supports. Longish M10 bolts with countersunk heads and with nuts and locknuts are used for the supports. By means of supports, the depth of cutting (planing) of sawn timber is adjusted.
The main unit of the machine is a working shaft with a rotary plane and a saw blade.
The shaft is mounted in 2 bearings N 80305. The bearings, together with the housings, were used from abandoned collective and state farm agricultural machinery. The shaft was machined from steel 45, and the rotor of the planer was made of duralumin. Then the rotor was planted on the shaft on a tight hot fit without keys and pins. He gave these parts for revision to specialists: on the shaft they ground the seating surfaces, in the rotor they milled longitudinal grooves for knives.
The rotor of the planer is three-blade. Knives. with double-sided blades, made of high-speed tool steel P18. In the grooves of the rotor, they are fixed with MB screws by means of clamping strips.Before assembling the working unit, the specialists adjusted the proper parts (knives, screws and strips) by weight, and after assembly they painstakingly balanced the unit: although the rotor diameter is small, but the rotation speed is such that it is even insignificant the imbalance would cause a huge vibration. The double-ribbed V-belt drive pulleys are duralumin with a profile of grooves for type B belts. I picked them up ready-made from some dilapidated metal-cutting machine. The diameter of the driven pulley is slightly less than the diameter of the driving pulley. as it follows, the rotation of the planer rotor and the saw blade is slightly higher than the angular speed of the electric motor, in other words, a bit more than just 3000 rpm.
The circular is always in the yard on the personal plot. Therefore, in order to avoid unauthorized turning it on by the grandson, in addition to the switch in the electrical panel and the button station on the frame, he equipped the machine with a “secret”. an additional, hidden from view, switch. I close the working bodies in the inoperative state of the circular from above with an iron casing. an inverted old iron trough, attaching it at the corners to the table plates with bolts
Circular from the engine from the washing machine
Such a useful thing as a working motor from an automatic washing machine should not idle around in your garage.
Any self-respecting homemade product will itch at the sight of such a promising detail.
Circular saw with his own hands
In this article, we will tell you how to make a very good light and compact circular on the basis of such an engine, on which you can easily dissolve a fiftieth board or even a 10×10 bar.
Attention! Do-it-yourself assembly of the circular saw and its continued use can be dangerous! Therefore, do not take up this business if you are not confident in your skills and do not follow the safety rules! This article is not a call to action. And remember, all responsibility for what you do rests only with you.!
How to connect a motor?
Connecting the engine is the most important stage of work, if you cannot connect the engine from the washing machine correctly, then you will not be able to make a circular with your own hands. The whole difficulty is not even in the connection, but in achieving a stable adjustment of the motor speed, without this the circular will not work normally. the disc will tear the lumber.
The manufacturer installs a so-called tachometer or speed control sensor on the engine from the washing machine. But the problem is that the operation of this sensor is controlled by the electronic module of the washing machine, you cannot put such a module on the circular, so you have to think about the device that will control the engine speed. Details on how to adjust the engine speed from the washing machine is described in the article of the same name.
Bed and frame
Having assembled the parts for the moving parts of the circular, we just have to make a reliable frame and bed for our circular. In principle, for the bed of a household circular, you can take the most common improvised material, for example, a piece of thick flat slate. Cutting a rectangle out of it and cutting a hole for a circular saw costs nothing. But we are supporters of capital structures, so we prefer to take a sheet of metal with a thickness of 3 mm for the circular bed, and a metal corner for the frame of 30 mm.
In the picture above, you can clearly see what elements the frame of a homemade circular consists of. In this case, it is also welded by hand, only not a static metal corner is used as supports, but special home-made racks. The stand is made of two metal pipes of different diameters, which are inserted into each other, so the circular bed can be adjusted in height.
Experts insist on a welded frame for the circular, since vibration is bad for static fastenings created with bolts. Although if you do not have welding, as a last resort, you can make a frame from the corners by fastening them together with bolts and nuts. It is also better to weld the bed to the frame.
So, making a circular from the washer engine with your own hands is quite possible if you have experience in making various homemade homemade products. Try it yourself and, perhaps, you will gain some experience, which you will later share with our readers. Good luck!
DIY Circular Shaft
In your house of the estate type, when, of course, there is a subsidiary farm with several auxiliary buildings, for their maintenance and repair a wood-cutting machine, called a circular among artisans, is simply needed. I also have such a machine, also home-made, as well as most of mine. ” household equipment. I did it in such a way that you could do carpentry and joinery work, and cut firewood, and, if necessary, cut the metal, replacing the metal saw blade with a cut-off emery wheel.
The assembly of the machine, as it is called, is traditional. The drive, tables, working bodies are mounted on a common conventional frame. The machine’s drive is electronic. An electric motor with a power of 4.5 kW with a speed of 3000 per minute is powered by a three-phase alternating current network with a voltage of 380 volts. It is mounted on the frame so that the tension of the drive V-belts is carried out by the force of its gravity.
The frame is ordinary, welded. The racks are made of an equal-angle iron 45 × 45 mm angle, the struts are made of a 35 × 35 mm angle, and the straps. both lower and upper. are made of a rectangular pipe 60 × 30 mm. From the same pipe, two connecting upper crossbars are made. A pair of front struts are attached to the runners (two iron strips 455x50x10 mm) of the electric motor with 4 bolts M10. The struts also serve as guides when tensioning the drive belts: instead of the fastening holes, longitudinal grooves are made in the struts.
How to make a circular from a washing machine engine with your own hands
Homemade circular saw made by hand: detailed photos of making homemade products and description.
So I decided to make a homemade circular saw for woodworking and preparing firewood for the stove. For a resident of a rural area, this is a rather necessary machine, every year many branches accumulate in the garden that can be sawn for firewood, this can be done on a regular circular.
Further, the very process of making a circular saw with your own hands.
They gave me such an electric motor, it looks not very good, but it is quite working.
I checked it, it works, I started to restore it.
How To Make A Homemade Table Saw With Circular Saw
From a profile pipe of 30 x 30 mm I welded just such a frame for a circular saw table.
I got the shaft for the circular from Soviet times, with a jointer and knives, fixed the shaft on the frame with bolts.
I made a platform for the motor, installed it, put the belt on the pulley, checked it. it works.
To work with a jointer, in order to realize the lifting of the table relative to the shaft, I decided to attach one part of the table to the hinges to the frame, and fixed the other part to a bolt, to which handles are attached to quickly adjust the depth of sawing wood with a jointer.
I fixed the switch on the frame, put the tabletop on the frame.
Here is such a simple homemade circular saw, now you can saw boards, work with a jointer or prepare firewood for the winter.
Having successfully connected the engine from an automatic washing machine with your own hands, and having checked how it picks up and decelerates, you can start making our circular. The diagram below shows a simplified drawing of a homemade circular saw made using a washing machine motor.
The diagram can be further simplified by being away from the bearing assembly. For household circulars, this is quite acceptable.
For now, we will only be interested in the moving elements of the circular, which will bear the main load, namely:
- circular saw shaft;
- washing machine motor shaft automatic machine;
- drive belt;
- washing machine motor pulley; automatic;
- saw blade pulley.
The drive mechanism should work as follows. The motor from the washing machine drives a shaft with a small pulley pressed onto it. The small pulley is equipped with a drive belt, which transmits revolutions to a large pulley, which is put on a shaft, which drives a circular saw. It seems at first glance everything is simple, but when you make a circular, a lot of subtle difficulties emerge that have to be resolved.
- It is imperative to grind the small pulley with your own hands, making 3-4 transverse grooves on it, so that the belt clings to them and does not slip.
- The drive belt does not have to be taken from the washing machine, you can take a similar part from any other equipment, if only the belt is strong and has serrated.
- On a large pulley, you will have to weld a disc of a slightly larger diameter with your own hands on the edge, so that a kind of protrusion is formed that will prevent the drive belt from jumping off during operation. On a large pulley, it is not necessary to grind the serrations, the grip with the belt will be normal without it.
- The shaft on which the circular saw will be supported, as well as the nut and washer, must be reliable so that, firstly, the circular saw does not deform at high speeds, and secondly, so that the circular saw does not jump out and cause harm to the person working with the circular It is better to take the finished shaft, washers and nut from the standard factory circular.
The described mechanism is designed for a three-hundredth disc. There are many skeptics who say that the engine from the washing machine will not pull such a disc, and that it will stop at some point during operation, and the saw will get stuck in the board. To such skeptics, our specialists answer the following.
In the future, do not overload your homemade circular with work, and most importantly, do not let the engine run for a long time without load.
Which engine to choose to make a circular
The choice of motor for creating a mini circular depends on its power. It is advisable to use a motor with a V-belt, which will transfer its speed to the saw blade of the machine.
For a 350 mm disc, you need 1 kW of power to start. A disc with a diameter of 170 mm will require about 500 watts. Therefore, you can put the motor from an old washing machine.
It is important to regulate the number of revolutions of the engine, otherwise instability in operation will lead to the fact that the disc will tear the material.
In the washing machine, the revolutions are controlled by a tachometer, which is controlled by the control module. But it is impossible to connect a module to the circular, so install a voltage regulator. Use the wiring diagram to correctly install the motor.
A trigger can be installed to start the saw. If you provide thermal protection for overcurrent, then when the switch is jammed, it will turn off automatically. A button from a door lock will do.
Often, such machines are stored in the yard, outdoors, so protect the electrical part from moisture.
How to make a circular from a washing machine engine
The working motor from the automatic washing machine should not collect dust in the garage. Even a home craftsman can find a use for it. We will tell you how to make a homemade circular from a washing machine engine.
Such a tool will help you to cut firewood and master carpentry. However, be careful: careless use of a homemade machine can lead to unpleasant consequences. Therefore, before starting a job, you must be completely confident in your abilities.
Circular with a washing machine engine do it yourself
You figured out what kind of engine you need and how to connect it. Now consider the design diagram of the circular saw.
For a circular, made at home, the absence of a bearing assembly is allowed, which will greatly simplify the design.
The main load will be on the moving elements. It:
- saw shaft and electric motor;
- the pulley of the motor and the saw shaft;
- drive belt.
- The drive belt does not have to be taken from the washing machine, other belts can be used. The main thing is that they have notches, like a wedge-shaped belt.
- On the small pulley, you need to make flow grooves. The belt will cling to them during operation, which will avoid slipping.
- A larger disc is welded onto a large pulley, which will prevent the belt from jumping off.
- To fasten the circular saw, use the shaft where it is inserted, as well as the washer and nut, which it is fastened with. It is recommended that you pick up or take this kit from the factory to keep the drive as secure as possible.
When creating a design, you need to take into account that it is designed for a three-hundredth disc. Of course, a do-it-yourself circular machine is only suitable for domestic use. Therefore, try not to overload the engine.
Frame and bed fabrication
The bed is made of 3 mm thick sheet metal. Before making the frame, prepare a 30 mm metal corner.
As shown in the photo above, the master installed the frame in homemade pipe racks. Now it is possible to adjust the height of the device. However, it is recommended to make a one-piece frame by welding the pieces of the corner together. Strong vibration over time loosens the fasteners of bolts and other elements.
When making a circular, consider the possibility of its repair. All moving parts should be easy to lubricate. Before starting work, it is advisable to prepare detailed drawings.
Please note that the mini circular saw varies in size. It is much smaller than usual and can fit when stored in a closet.
How the device works
The engine starts, which drives the shaft with the pulley. As a result, the drive belt rotates, transmitting revolutions to the saw blade pulley. The saw starts to rotate, allowing the material to be cut.
A homemade circular machine is always useful in the household. Due to the fact that it can be made from available tools, it will cost you almost free.
Which motor to choose?
The first criterion for choosing a motor for a circular saw is power.
It is recommended to choose among engines equipped with a V-belt.
This will simplify the process of transferring revolutions to the saw blade.
To start a 350 mm disc, 1 kW of energy is required. If you use a 170 mm disc, you need about 500 watts. Therefore, to build a circular, they use the engine of an old washing machine.
In a circular, it is important to be able to control the number of revolutions of the motor, otherwise the saw will simply tear the material. In washing machines, a tachometer is responsible for controlling the number of revolutions, which is controlled by a control module. However, the device does not connect to the circular, so you will have to use a voltage regulator.
How to make a circular with your own hands from a washing machine engine?
A washing machine is a useful household item. However, over time, the device breaks down. There is an element in the washing machine that should not just lie around in the garage. this is the motor. It makes an excellent circular saw.
After the engine is connected, you can proceed to creating a circular. The next step is the assembly of the movable elements, since it is they that bear the basic load, namely:
- Motor shaft.
- Saw shaft.
- Drive belt.
- Motor sheave from washing machine.
- Saw blade sheave.
The design itself is simple, but there are a lot of points that are important to consider, for example:
- It is recommended to grind the small pulley by making 4 transverse grooves, this is necessary so that the belt clings and does not slip.
- It is not necessary to use a drive belt from a washing machine, you can take any suitable main thing so that it has transverse serrations.
- The saw shaft must be as reliable as possible, which also applies to the nut and washer. Otherwise, the saw may deform, or even jump out and damage the working person.
How to connect a motor?
Connecting the motor is the main stage in the construction of a circular saw.
If it is not possible to correctly connect the motor from the washing machine, then the device simply will not work.
The difficulty is not in connecting the engine, but in ensuring stable speed control.
As mentioned above, without this, the saw will simply tear the material. To ensure regulation, you can use a voltage regulator instead of a tachometer, which is equipped with motors of washing machines.
When connecting, some masters get confused, since the collector motors that are installed on automatic machines have several outputs at once. Therefore, it is not clear how to connect.
The connection is as follows:
- First, the motor must be rotated several times in order to find the excitation coil or shoes. They must have 2 or more wires.
- Using an ohmmeter set to minimum resistance, we ring each output in turn. Here you need to find the two with the greatest resistance from all the available outputs. This is if there are more than two wires.
- After that, you need to find the engine manifold and brushes, from which two wires should also go.
- After that, you need to find the outputs of the tachometer. Often these wires can be found right on the case. If they are not there, then they are hidden in the case, then you will have to disassemble the engine a little.
- Now you need to take one wire from the collector and connect the wire from the coil to it.
- Another collector wire must be connected to a 220 V network.
If necessary, you can change the direction of rotation by simply rearranging the wires. We make a test run, having previously marked the wires of the coil and the tacho sensor.
If the engine starts without problems, then everything is done correctly. Separately, you can consider the process of connecting the engine using the speed controller:
- We connect one of the coil wires to one of the armature wires.
- We connect the other to the network.
- Connect the second armature wire to the dimmer.
- Connect the other output of the dimmer to the network.
- Trying to start the engine.
Important! Be sure to follow the safety precautions during test run. Never try to touch the rotating parts of the device with your hands.
Bed and frame
After assembling the moving elements, it remains only to make a reliable frame and bed. Considering that this is an ordinary homemade circular saw, almost any material at hand can be used as a bed. For example, a sheet of flat slate. All that is required is to cut it to the required size and cut a hole in it for the saw blade.
Slate will be enough, but if you want to make a high-quality and reliable saw, then take a metal sheet with a thickness of at least 3 mm. And for the frame you need a metal corner of 30 mm.
To weld a circular frame, you must:
- Weld from the corners two metal squares (or rectangles, depending on the expected dimensions of the saw) of the same size.
- Next, connect with four corners of the same length.
- In the upper part, two more corners are welded across the main square. This will be the support for the bed.
- From below, exactly the same two supports are welded only transversely with respect to the upper ones. This will be the support on which the motor is located.
- Now it remains to weld the legs from below, assemble and connect all the elements, and the saw is ready.
Important: If there is no welding, then the elements can be fastened with bolts, however, such a frame will be less reliable, since the bolts are unscrewed during operation.
Using the motor of the washing machine, you can not just “for beauty” to assemble a circular. Such a device will be useful for assembly, sawing or construction work. For example, with the help of a circular, you can easily dissolve a block of size 1010. Is this not an indicator?
How the device works?
The circular saw works as follows:
- The motor starts and drives the shaft with the pulley.
- As a result of rotation, the drive belt transfers the revolutions to the saw blade.
- After that, the saw rotates, due to which it cuts the material
A homemade circular saw is a useful tool in the household. And due to the fact that the materials at hand are used, the cost price is minimal.
There is nothing complicated in assembling a circular saw, but there are some nuances. The circular saw motion module includes the following elements:
- motor shaft;
- shaft for disc attachment;
- belt that transmits movement;
- motor and saw pulley.
Important! In a simplified version, it is possible to assemble without the use of bearings.
The build process includes the following steps:
- a drive belt is put on the smaller pulley: rotation is transmitted to the saw blade from the shaft; to avoid slipping the belt, notches are needed on the pulley, if they are not there, we make 3-4 transverse grooves ourselves;
- for better adhesion, bitumen can be applied to the surface;
- the belt can be used not only from a washing machine, but also from any equipment; it must be jagged and strong enough;
- in order to avoid slipping of the drive loop from the large pulley, a small protrusion is welded on its end; you can weld a disc of a larger diameter than a pulley;
- For safety reasons, the disc on the shaft should be fastened very well so that it does not jump off during operation, which can lead to serious injuries;
- to adjust the belt tension, the engine fixing hole must be bored.
To start a homemade circular saw, you can install a switch from an old household appliance. A push-button switch, which was used on Soviet models of washing machines, will do. At the entrance, it must be powered by two contacts, and inside one wire must be bifurcated. Thus, we get three outputs: one will be a phase, the second will be zero, and the third will give a displaced phase through a capacitor. This circuit breaker will provide a start, but after it you need to disconnect the capacitor.
For the convenience of work, the circular saw must be placed on a frame with a bed. It can be made from a 20 mm rectangular profile. The frame is connected by welding, since during operation, vibration is transmitted to the joints, and they must be securely fastened. Bolted connection is acceptable, but less reliable. It will need to be periodically inspected and bolts tightened. It is also better to weld the bed to the frame. The engine is fixed at the bottom, a working platform is obtained at the top. You can also adapt the table from an old foot-operated sewing machine.
Important! A homemade circular saw from a washing machine motor, of course, will require time, but will significantly save your budget.
The question arises whether any washing machine will work. Of course, the more engine power, the more powerful the saw will turn out and cope with large tasks. But a low-power tool will always come in handy on the farm. It does not need a stationary table, an ordinary box will do, which will be both a support and a place for chips. The main aspect is to connect the motor correctly, otherwise the assembled circular saw will not work. But this is not the only difficulty.
In order for the tool to work properly and cope with various tasks, without spoiling the material, you need to adjust the engine speed. In a washing machine, a tachometer is responsible for regulating the speed, which is controlled by an electronic system. In a homemade tool without electronics, a different solution is required. The collector motor has several leads. In order to determine which one to connect to, you need to “ring out” with an ohmmeter all the leads in pairs. Finding where the greatest resistance is.
We also check other connections at the collector and brush outputs. We also carry out measurements and mark the wires of the speed sensor. If in the model they are inside the case, it must be disassembled. We connect one output from the coil to the first outlet of the collector. The remaining contact of the coil with the second collector outlet must be connected to the mains. We are conducting a test run. Since there is a high risk of injury from moving parts and electricity, you need to be extremely careful.
Important! To turn on the rotation in the opposite direction, you need to swap the contacts.
During the operation of the tool, it becomes necessary to work with materials of different dimensions, therefore, it is necessary to be able to adjust the speed up or down. To do this, you can use a dimmer or trigger from a hand-held electrical device, because they allow you to adjust the voltage supply and, accordingly, the speed of rotation of the disk. We connect one of the terminals of the coil to the output of the armature, and the second is powered from the mains. We connect the second armature output through the dimmer in the same way. We check the circuit and run.
How to make a circular saw with your own hands from a washing machine engine?
A circular saw is always useful on the farm: in the country or in a private house. But not everyone can afford a good expensive tool, and a cheap analogue quickly breaks down. The way out of the situation is to make a circular saw with your own hands. For example, you can make it from an engine from an old automatic washing machine, which is a pity to throw away, and takes up space. Such a homemade tool is able to cope with a board up to 5 centimeters thick. The advantage of this design is its weight, which is about 20 kilograms. The saw turns out to be mobile and you can carry it with you in the car.
Consider the following tips from professionals:
- homemade circular saw is intended for domestic use; it is capable of processing small volumes of lumber with periodic interruptions in work;
- if the tool is often in demand and the amount of work is large, in this case it is worth considering the option of purchasing professional equipment;
- no need to cut forcibly if the material does not go; for a more powerful tool, a more powerful engine is accordingly needed.
How to make a circular saw from a washing machine engine, see the video below.
Circular saw from the engine from the washing machine machine
As a power unit, the author used a 430-watt automatic machine from a washing machine. The selected motor produces as much as 15,000 rpm, at such speeds the saw has a monstrous performance, but this is unsafe and unnecessary, so in the future the author plans to reduce the speed by installing a resistor or something similar. The machine is assembled simply and quickly, the author’s table was already ready, he used an old foot sewing machine. So, let’s figure out in more detail how to assemble such a machine!
Materials and tools used by the author:
List of materials:. engine from a washing machine;. metal table (from an old sewing machine);. corners, channels, etc. (for making a frame for the engine);. switch and wiring;. a circular saw blade (the author has it fixed on a bolt );. chuck for a drill (installed on the motor shaft);. nuts, bolts;. plywood.
List of tools:. angle grinder;. welding machine;. drill;. wrenches, etc.
Circular machine manufacturing process:
Step one. Preparing the base As a base, the author used a metal table, which in ancient times was part of a foot sewing machine. You can assemble a similar table from scratch using a corner, pipes or something similar. We weld two corners or channels, to which we then screw the engine.
Step three. As a finish, we screw the protective plywood plates over the engine so that no shavings fall on it. We cut out the parts from plywood and fasten them with self-tapping screws. That’s all, the machine is ready, let’s start testing! During tests, it turned out that the revolutions are too high, from this the table drives around the garage. The power of such an engine turned out to be more than enough. In the future, the author plans to modernize the machine. to make the revolutions less.
In general, the homemade product turned out to be successful and viable. I hope you enjoyed the project and found useful information for yourself. Do not forget to share your homemade products and developments with us!