Homemade jigsaw machine with your own hands drawings. How to make a jigsaw machine with your own hands: break down point by point

In today's article we will look at extremely interesting homemade product, which will surely come in handy for every DIYer. Namely, today we will look at how to make a jigsaw. This tool is very useful on the farm and it itself very often comes in handy when building any homemade items. Today we will look at one of the cheapest and available options assemblies. The homemade product will consist of the cheapest and most available materials, which you probably have at home, and if not, then you can easily find them in your city, or you can order them from our Chinese friends. In general, the homemade product is very interesting, so let’s not delay with a long introduction, let’s go!

For this homemade product we will need:
- 775 class commutator motor. (these are usually installed on professional RC models).
- Wires
- Some kind of plastic flywheel (large flat gear)
- PVC pipe, inner diameter which will be equal outer diameter electric motor
- Corner for PVC pipes
- Jigsaw blade
- Small metal plate
- A small (but thick) board
- Thick wire (or, for example, a bicycle spoke)
- Button
- Power connector
- Power supply (12-24v 1-2A)
- Not a large sheet of laminated MDF panel or plywood

We will also need the following tools:
- Soldering iron
- Solder
- Marker
- Hot-melt adhesive
- Wire cutters
- Pliers
- Round nose pliers
- Cold welding
- Self-tapping screws
- Screwdriver
- Heat shrink
- Drill and core drill (diameter equal to the diameter engine)

To begin with, we need to choose the most main element design, namely an electric motor. In our case, it should be with a large number of turns (such an engine has a large torque). And also, in order for the homemade product to serve you for a long time, you should take into account that it is desirable that the electric motor shaft rests on bearings, and not on bushings, as is often the case. We will also need some kind of flywheel; for this, the author of the homemade product took a large and flat gear that he had.

We put our flywheel on the electric motor shaft, and since the diameter of the internal hole of the flywheel is slightly larger than the diameter of the electric motor shaft, the author of the homemade product decided to strengthen the connection with a small piece cold welding. This connection turned out to be quite strong and reliable. Then, using a simple soldering iron, we solder two 15cm wires to the contacts of the electric motor and insulate the connection with heat shrink.

After which we will need to take a PVC pipe, the internal diameter of which will be equal to the external diameter of the electric motor. This pipe will act as both a motor mount for our engine and a handle for our tool. We also need one suitable PVC corner for this pipe.

To begin with, we need to make all the necessary holes in the PVC pipes. Namely, on a long pipe we should make a hole for the button. To do this, use a marker to leave a mark in a place convenient for you and make a through mounting hole for installing the button. And at the corner we should make a hole for installing the power connector (to make a hole, we repeat the same steps as we did with the pipe above).

Then we “press” the electric motor into the PVC pipe that we prepared earlier. Note that the engine must be installed so that there is a minimum gap between the PVC pipe and the flywheel (but the flywheel itself should not touch the pipe).

For the next step we will need to take a jigsaw blade (whichever you plan to use) and a small metal plate. We apply the canvas to the metal plate, as shown below, and trace it around the office using a marker. Then, using wire cutters, we cut out triangles from the metal plate so that we end up with antennae where the blade expands.

We apply the canvas to the plate in the same way as we applied it earlier, and using pliers we bend and press the antennae first, and then bend the plate, as shown below. Next, use round pliers to twist the same “roll” as in the photo (see photo).

The next step is to take a small metal plate again. We bend this plate using pliers so that we get a “T” shaped part with a groove inside. Inside the groove itself, the canvas that we previously prepared should move quietly.

After which we will take a small, but wide board with dimensions approximately as in the photo below. Then in the indicated place (see photo) using a core drill we make through hole such a diameter that a PVC pipe with an electric motor fits securely in it.

We apply another metal plate to the newly made workpiece in the place indicated in the photo. Metal plate should be slightly larger in width and length than the “T” shaped part that was made earlier. Then we apply the “T” shaped part to the plate that is already lying on the board and, having drilled holes, screw these plates to the board using self-tapping screws.

Then we need to take a thick and stiff metal wire or, for example, a bicycle spoke. And from this knitting needle we should make a kind of connecting rod (see photo). This part must connect the blade and the flywheel so that when the flywheel rotates, the blade moves “back and forth.” You should end up with a piece approximately the same as shown in the photo below.

Then we install the “connecting rod” first on the canvas, and then install the PVC pipe with the electric motor in its place (to the board, as in the photo below). And the second “connecting rod” goes into the flywheel hole. By rotating the flywheel by hand, we check the functionality of the mechanism.

Let's move on to the electronic part of the homemade product. Namely, we install the button. We solder one wire from the electric motor to the button, and the second wire is just a 5-6cm piece. We insert the button into its mounting hole and secure it with hot glue. Then, having inserted the wires through the corner, we will install the corner itself on plastic pipe, as it is shown below.

Next we should install the power connector. We solder the wires coming from the electric motor and from the button to the connector itself (the wires should be inserted through the mounting hole for the connector), and finally, we install and secure the power connector in its place using hot glue.

We insert a piece of the same PVC pipe to the second end of the corner. The length of the pipe should be such that when we place the structure on the table, the handle itself should be exactly parallel to the table. After which we will need to take some small sheet of laminated MDF panel or plywood, the main thing is that it glides well over the surface. From the panel we took you, we cut out a similar blank as in the photo below and connect it to our mechanism using hot glue, and in the place where it connects to the wood, we fix it with self-tapping screws.

All is ready! In the end we got very useful tool, which will definitely come in handy for you on the farm! All that remains is to connect the power supply and test it, you can see the homemade test below.

A jigsaw is a very common tool. However, when working with it you have to face certain difficulties: the file either breaks or jumps out of the clamps; when cutting along a curved contour, it often twists, which makes it difficult to maintain the required direction. A homemade electric thermal jigsaw is much more convenient, which allows you to cut parts of any shape, both from plywood (wood) and organic glass, ebonite and other flammable or melting materials. Although it also has some disadvantages.

So, I’ll try to tell you how to make a heat-cutting jigsaw

The design and main dimensions of my electric-thermal jigsaw are shown in Fig. 1, however, everyone is free to select the dimensions of the jigsaw themselves (often these dimensions are determined by the parts at hand).

In general, a jigsaw consists of a tubular arc, a handle, an electric button, nichrome wire, wing nut screws, insulating gasket, earring and electrical wire.

The arc (frame) of my jigsaw is made of a duralumin tube with a diameter of 12 mm. It can also be made from multilayer plywood. But in any case, this frame should be light and durable. The handle is made of textolite 10 mm thick. On one side, a cylindrical shank is attached to the handle, the diameter of which corresponds to the hole of the arc tube. A groove is cut in the shank for the power wire to pass inside the tubular frame. On the other side of the handle there is an earring (Fig. 2). It is made of 1 mm thick copper sheet and is screwed to the handle with two screws. The end of the nichrome wire, the “cutting” element, is attached to the earring with a screw and wing nut. In the middle of the handle, with the help of two cheeks (plates) made of sheet duralumin 0.8 mm thick, an electric button is fixed. At the other end of the frame, a PCB plate with a clamp for the “cutting” element is attached (see Fig. 1).

Rice. 2. Earring.

A spiral from an electric iron (spiral wire diameter 0.5 mm) is used as a “cutting” element. The length of the wire, of course, depends on the size of the tubular arc. The nichrome wire in the frame is fixed with some tension.

To heat a nichrome wire, a voltage of 12...14 V is required, and a rheostat is desirable to regulate the degree of heating of the wire.

The operating current of a heat cutter depends both on the characteristics of the material being processed and on the length and thickness of the nichrome wire. With the jigsaw dimensions shown in Fig. 1, and using nichrome wire with a diameter of 0.5 mm, the current consumption is determined according to the properties of the material being cut and is usually 3...5 A. Before starting work, the current required to heat the wire to the appropriate temperature is set with a rheostat. It must be taken into account that at high current ( high temperature wire), the same plywood can catch fire, and if the wire is not heated sufficiently, for example, when processing plexiglass, the latter will only soften, but it will not be possible to cut it. A jigsaw is simple in design, easy to use, and allows you to cut (burn out) parts of any shape.

The only disadvantage of the tool is that when working with a heat-cutting jigsaw, smoke is released that occurs during the combustion of the material being cut. Remember also that working with an electric jigsaw requires compliance with certain safety measures. Thus, flammable objects must be removed from the workplace, and the room itself should be constantly ventilated. And protect your hands from burns!

I. Kovalevsky, “Homemade jigsaw-heat cutter.”

All materials from the “Ideas for the Master” section

Home / Likbez / Why do you need a manual puzzle?

Why do you need a hand puzzle?

According to its origin, that word is "saws" This is an analogue of the German word "laubsäge", which means sawing along a curved path. Exists manual builder frame shaped like an arc of arms and clamps, built for fastening saw blade.

This canvas is very thin and narrow, which allows you to cross uneven paths, that is, whenever you change direction.

Due to insufficient space between the frame and the blade, the saw can encircle the edges of the material to be processed. The disadvantages of this tool should be noted for weak mechanical strength, which leads to the fact that the “strip” saw often breaks under special loads and the relatively small size of the frame, which makes it impossible to work at a large distance from the edges of the material being processed.

The hand puzzle is used for processing wood and its derivatives (plywood, fiberboard, etc.).

This tool also finds its application in stacked processing of non-ferrous metals. Hand puzzle allows you to cover beautiful patterns made of wood, so its meaning never fades. It is actively used in the production of elegant design elements.

There are many advantages that allow us to saw with lumber from plywood and other wood products:

• Economy. In general, a wood pile with a dozen saw blades will cost 5-6 cubic meters.

  A 1500x1500 mm plywood pattern will cost about 6-8 USD. However, it is sufficient for several large or much smaller crafts.

• Associations with meditation.

  Sawing with a handsaw can be compared to relaxation. Imagine: a sheet of plywood becomes your own image. For many, it may seem that this work is monotonous and boring, but when you take the puzzle and the plywood leaves, the person completely focuses on the work and forgets about returning the city.

What is a hand puzzle?

• Finger motor skills and strength training.

  Cutting out small and complex parts, concentrating on learning and knitting with fingers, and in case of failure, the person does not throw his hand - again takes a new sheet of plywood and saws. This is the formation of a sign.

• Saving on the purchase of expensive decorative elements. Nothing is more impressive than decorating your home with your own hands.
• This is the accessibility of a hand saw for children.

  It's hard to imagine how much fun this baby could bring to a child.

What advantages we noticed, the only disadvantages are the fragility of the saw blade and the small size of the frame. Thus, we should not avoid this tool: it is not obsolete! It is still capable of delivering its electric counterpart!

Photo: hegner-gmbh.com, selbst.de

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Desktop jigsaws: advantages and features

The jigsaw is designed to perform straight and curved cuts on various sheet materials and workpieces of complex shape, including without violating the external contour.

Homemade jigsaw machine for sawing: drawings and video

Most often, jigsaws are used for cutting wood and wood boards, plastic blanks, parts with complex contours made of plasterboard and laminate, as well as for cutting sheet metal.

Bench jigsaws They are a stationary structure, which accounts for most of the advantages of this type of cutting tool.

Modern models of desktop jigsaws are designed to work with wood materials with a thickness of 40-50 mm.

The working body is a narrow file, which makes progressive and return movements in the vertical direction. At the same time, due to the peculiarities of the notching of the teeth and the mechanics of the movement of the saw, cutting into the material occurs during the upward stroke.

Advantages of tabletop jigsaws:

• high precision and accuracy of cuts;
• wide customization options depending on the material and the required shape of the cut workpieces;
• increased safety and comfort of work.

The disadvantages of desktop jigsaws include their rather large dimensions and the difficulty of working with large workpieces.

Reasons for choosing a table jigsaw

Choosing to buy a tabletop jigsaw is justified when you need to make clean cuts of complex shapes and work with small parts.

High cutting accuracy is achieved due to the stable, fixed position of the tool during operation. The stability of the saw stroke is ensured by the tension system and guides, which are absent hand tools. Relatively big sizes The table provides a larger support surface for the part being cut, which means greater stability and smaller deviations from the given sawing direction.

To some extent, a table jigsaw is a mini-machine for cutting workpieces.

Some models of tabletop jigsaws provide the ability to select the power (for example, the Corvette Encore jigsaw) supplied to the engine, as well as adjust the frequency of saw strokes ranging from 500 to 1600 movements per minute (for example, the DS 403 Vario jigsaw). Usually. The design of the file clamp allows you to quickly replace it, as well as install it in one of several positions. Adjustable tilt of the table relative to one or two axes complements the capabilities of cutting at an angle.

Many table jigsaws equipped with additional devices, such as an angle stop with degree notches, a transparent protective screen and a blowing system that frees the cutting area from sawdust.

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Good to know:

DIY Jogging Puzzle

Cutting miniature and small parts can be done using various instruments. It is relatively easy to handle these pieces with an electric puzzle. But in this case there are some problems that need to be solved.

Self-winding puzzle

For example, working with small parts will be very difficult because there is no reliable fixation. But a large file width will not allow for a large curvature of the cut.

Fortunately, these problems are solved very easily, in this situation the problem of creating an electric puzzle machine is solved.

The essence of the machine is to ensure that the working parts are securely fixed and then processed easily. Thus, a composite machine from a hand assembly can be made very in a simple way. For example, you can take a panel of plywood and create a gap in it. This slot will contain a saw blade.

Then make several holes to securely attach the blade. After that, on a plate with plywood, you need to do everything necessary to secure it to the table.

The floor surface can be secured to the table using clamps. As I work, I may ask questions about how to make a slot on the stove. This can be done in different ways, be it one of these. Mark a line on the plywood panel at the point where the hole will be. Then take a drill bit and start drilling holes along this line, puckering each other if possible. As a result, only a smooth round hole will be required in one continuous slot.

Finally, something similar to the device shown below appears.

As you can see, this version of the machine remains with a standard file, which greatly limits the curvature of the cuts.

So give an example in which the saw can be made miniature, which increases the curvature. Using thin files is different only in that it requires additional clamping device. So make the car from the previous example, you need to do a little check on the levers. This lever should be secured with a spring to provide a soft grip on the saw. On the punch side, the thin file must be attached to the thick part. Don't forget to turn off the rotation function.

Below you can see this exact version of the car.

And, of course, how to consider the possibilities of self-employed machines, without the use of an almost complete assembly machine.

In this case, the thin saw is already fixed between two arms - upper and lower, and the electric pile crosses the path to the lower arm.

Well, there are many options for creating jackets that can be seen from the puzzle, so the final choice will depend on you.

More information about tools, machines and equipment:

— Rotary saws

— Electric saws

— Glue gun

— Rubanok

— Drilling machine from drilling

— A circular saw from drilling

— Crusher

— Round hand saw

— Abrasive tools

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Electrical equipment for workshops

For technical work

Lecture No. 2.7.1

Electric jigsaws and hacksaws

Course, group, faculty: 2nd year, 2nd group, Faculty of Technology, full-time department,

Date of the lesson: ________________

Purpose of the lesson: study of the purpose, general design, technological characteristics, operating principle and safety measures when working with power tools and household appliances in technical workshops.

Lesson objectives:

Students' training is minimal necessary knowledge basic laws of electricity and mastering methods for carrying out electrical measurements in electrical circuits and performing verification of electrical measuring instruments

2. Formation of knowledge about the purpose, general structure, technological characteristics, operating principles and safety measures when working with power tools and household appliances in technical workshops.

Instilling skills electrical installation work in workshops and performing primary repair work electrical equipment in technical workshops.

Lesson plan:

1. Purpose, general device and classification by technical capabilities and manufacturers of electric jigsaws and hacksaws.

Technological characteristics and principle of operation.

3. Operation and safety precautions.

Purpose of electric jigsaws and hacksaws

Jigsaw is a universal tool designed for cutting.

Unlike a conventional hand saw, a jigsaw allows you to work with a wide variety of materials. The main advantage of a jigsaw is the ability to make curved cuts. A jigsaw is needed when you need to cut out some shape more complex than a rectangle - a circle, a wave, an oval.

Reciprocating saw (electric hacksaw)- to some extent a relative of the jigsaw. Reciprocating saws are equipped with a blade that makes pendulum movements of small amplitude, moving in a straight line and rising in the opposite direction.

The shape of the tool is similar to a large drill with saw blades extended forward.

Electric reciprocating saw considered a professional instrument. In everyday life there are extremely rarely tasks that require the participation of this specific unit. As for carpenters, installers, roofers, mechanics, finishers and even rescue workers, a reciprocating saw is, without exaggeration, indispensable.

General structure and principle of operation of an electric jigsaw

The structure of an electric jigsaw is presented in a schematic diagram:

Basic elements of a jigsaw :

An aluminum or steel guide plane, also called a base plate. It allows you to correctly set the cutting angle, ensure accuracy, quality, and ease of cutting.

Homemade jigsaw machine

File for cutting material. It is designed to perform a number of jobs with specific materials. There are no universal saw blades that would allow you to cut metal, wood or plastic equally well, but you can always choose exactly those working blades that best meet all the requirements.

Electric motor with a power of 300-900 W. This parameter allows you to determine what kind of material can be worked with, what thickness can be processed. When choosing equipment, not everyone pays attention to this criterion. You should not take too much power if you plan to perform household work, and the saved money will do the work with certain materials impossible.

A holder that ensures correct and smooth running.

5. The rollers that hold the mechanism ensure its movement.

6. A system that ensures smooth running of the saw.

The main working element of a jigsaw is a small file 50-120 mm long.

During operation, it makes reciprocating movements vertically with an amplitude of 20-30 mm and a frequency of 500 to 3000 working cycles per minute.

In this case, the thickness of the cut is approximately 1 mm.

The jigsaw blade is driven through a special gearbox by an electric motor.

To make the cutting process efficient, most modern models equipped with a pendulum mechanism. With its help, the file not only moves up and down, but also makes oscillatory movements back and forth according to the principle of a clock pendulum. This speeds up the sawing process and reduces the load on the engine.

When moving downward, the cutting blade is retracted from the material, and cutting is performed only when it moves upward, which makes the tool more productive and stable in operation.

To obtain a clean and even cut, as well as when cutting fragile and hard materials pendulum mechanism It's better to turn it off.

Because cutting tool jigsaw - a file, which is also the main expense item when working with it.

The range of saws for jigsaws is very diverse, and each of them has its own purpose. Files vary in shape, size, and sharpening.

They are made from various materials and are designed for a specific class of tasks.

Jigsaw files

You should pay attention to the pitch of the saw teeth: for wood, a blade with a pitch of 2.5 to 4 mm is suitable, for metals and plastic - from 1 to 2 mm.

To cut non-ferrous metals, you need saw blades with a wave-shaped cutting edge.

For working with glass, ceramic tiles files with abrasive coating are used. High performance files differ from diamond coating, but they are quite expensive.

In order to guarantee high accuracy work, a base plate is attached to the jigsaw. It is also called the sole. Using a base plate frees the operator from having to hold the jigsaw suspended. Thanks to the sole, the distance to the surface being processed remains constant, which guarantees stable operation of the tool.

After several unsuccessful attempts to cut out complex shapes electric jigsaw, I decided to make a homemade tabletop based on drawings from the network jigsaw machine. Carve complex shapes on it small sizes It will be very easy to make from lightweight materials.

To assemble a jigsaw machine with your own hands from a jigsaw you will need:

• electric jigsaw
• sheet of plywood and boards for support
• wood screws
• bolts with nuts

Tools: drill, sandpaper, clamp, tape measure.

Step 1: Cut out the lid and base

Draw two 250x300 mm rectangles on a sheet of plywood and cut them out with a jigsaw. These rectangles will be the base and cover of your machine. Carefully process the surfaces of the rectangles sandpaper, especially the one that will be the lid.

Step 2: Making the front pillars

Show 4 more images

Measure the height of the jigsaw from the sole to the handle so that the jigsaw fits in the machine box; the stands must be greater than this distance. My jigsaw is 18 cm high, so I made 20 cm long stands from the board. Then I pressed the two pieces together with a clamp and sawed off 5 mm from them on both sides so that both stands were the same height.

Now the racks can be screwed to the base. To prevent the wood from cracking, you need to pre-drill holes for the screws and countersink them.

Step 3: Attach the jigsaw to the lid

Show 7 more images

1. Remove the soleplate from the jigsaw using the supplied hexagon. There is already one hole in the cover, you just need to drill three more so that there is a mounting hole in each corner.
2. In the central part of the plywood cover, mark the place where you will attach the jigsaw sole and the hole for the jigsaw blade.
3. Now you can drill four holes in the plywood, countersinking them with a spade bit so that the screw heads are flush with the surface. All that remains is to make a hole for the file.
4. Now put the sole back on the jigsaw skis, and attach the plywood cover to the sole so that the file fits into the hole provided for it.
5. Insert a washer into the widening of each mounting hole, insert bolts into the holes and tighten them on the other side with nuts. It was a little difficult to tighten the bolts, so I secured the head of each bolt with a flat head screwdriver and turned the other side with a wrench.

Step 4: Install the jigsaw on the base

Lower the lid with the jigsaw onto the base with the stands and secure it on top with screws, having previously drilled holes for them. Be sure to countersink these holes to prevent the wood from cracking when screwed. The jigsaw should not touch the base and should have a good grip on the lid. Therefore, the screw heads must be flush with the surface of the lid, otherwise they will unscrew while the jigsaw is running.

From the remains of the board, I made two additional rear posts, so the machine became much more stable.

Step 5: Modification of the machine

At this stage, the machine is quite functional; it is enough to simply secure it with a clamp on the tabletop and you can work.

I identified two features of my jigsaw:

• the blade moved a little to the sides, especially when working at high speeds.
• The width of the blade was greater than that of standard jigsaw files, making cutting particularly difficult thin holes left much to be desired.

Step 6: Reduce the width of the canvas

A narrower blade will give you the ability to cut fine curves and make it easier to cut rounded corners.

1. Pull the saw to the maximum, do not forget to turn off the jigsaw from the mains.
2. Mark the point where the blade exits the housing. Below this point nothing needs to be removed.
3. Remove the file from the jigsaw and grinding machine grind the canvas to the desired width. When grinding, dip the file in cool water so that it does not overheat, otherwise the metal will lose its hardness and the file will no longer be able to cut through anything. A change in color is a sign of overheating of the metal.
4. Once you have the desired blade width, place the file back into the jigsaw.

Step 7: Making a guide for the file

The guide will prevent the blade from moving to the sides during cutting, especially at high speeds.

I made the guide from a small strip of PVC plastic. At one end of the strip, use a jigsaw to make a small slot at an angle to the middle of the strip. We secure the strip behind the saw by screwing it to a wooden L-shaped piece mounted on the lid of your machine. The guide can be lubricated with oil for better movement.

Remember:

1. The guide should never be higher than the blade at the lowest point in the blade's path.
2. The guide limits the size of the material you are going to cut due to its height and mounting point on the surface. Therefore, it is better to fix the guide as high as possible (taking into account the previous remark), and move it as far away from the canvas as possible, with a slope to the side as soon as possible.

Step 8: Conclusion

With a little effort, you will have an almost real tabletop jigsaw. Of course, it will not replace a real machine, but given its zero cost, it is an excellent option.

The article will primarily be useful to those people who often work with wood as a hobby, without making money from it. The author presents a fairly budget project table jigsaw, which can be collected in one day, with minimum costs for materials.

To create the machine you will need the following materials:
- Working manual jigsaw;
- Plywood;
- Self-tapping screws and bolts with nuts;
- Guides for furniture drawers;
- Two bearings;
- Compression spring;
- Spray paint;
- Self-adhesive paper.

Materials and tools are standard, available in every workshop.

Step 1. Body.
The first step is to create a body for a manual jigsaw from plywood. Here you need to think in advance where the holes for the switch and speed controller will be located.
It should look something like this:

Step 2. Tabletop.
It is better to take a thick piece of chipboard with good coverage, since the workpieces being processed will rub against it during operation of the machine.

A hole for a saw blade is drilled in the chipboard. The jigsaw itself will be attached to the back of the tabletop.
A stem for attaching the boom is also made from furniture guides:

Here's what it looks like assembled:

And the tabletop is attached to the body:

Step 3. Arrow.
The boom itself will be made of two furniture guides. They are bolted together to increase rigidity.

Boom supports are made of chipboard. Before painting and installing them, the point at which the boom is attached to the support is measured. Before doing this, they need to be installed in their place:

After this, it is necessary to drill holes in the support for seats bearings.

Step 4. Painting.
The prepared supports are spray painted.

While they dry, the machine itself is covered with self-adhesive tape.

Step 5. Assembly.
Bearings are inserted into the supports and screwed into place.

The boom mounting axis will be made of two bolts screwed into the guides as shown in the photo. The diameter of the bolts is selected in accordance with the diameter of the inner race of the bearing.

The bolts are tightened securely, after which the two halves are screwed to each other.

This clearly shows how the boom will be secured in the supports:

The boom is installed in its place and secured with nuts.

Next you need to install the garter spring. It is necessary in order to return the arrow to its original position after the jigsaw pulls it down. This is how the saw will move back and forth. It must be adjusted so that it is not too soft (this will complicate the operation of the machine) and too hard (this can lead to overheating of the jigsaw motor).

How to secure it is shown in the photo:

Then, from a thin strip of metal (1 mm), it is necessary to make fastenings for the file to the arrow. They must rotate freely on the axis, since during operation the boom changes its angle of inclination to the jigsaw, and if they are static, this can lead to breakage of the saw.

This is what the mounts should look like:

The boom supports are additionally reinforced with a long bolt, it can be seen in the photo:

Step 6. Electronic part.
Since access to a manual jigsaw is limited, it is necessary to place the controls on the outside of the body.

To adjust the rotation speed of the jigsaw electric motor, the author used a phase power regulator. Here is its electrical diagram.

Since childhood, we have been familiar with the technology of sawing with a jigsaw. The principle is simple - a stationary part is placed on a stand with a technological cutout, the cut is made by moving the saw. The quality of work depends on the steadfastness of the hands and the skill of the worker.

In this way, you can literally cut lace from thin wooden or plastic blanks. However, the process is labor-intensive and slow. Therefore, many craftsmen thought about small-scale mechanization.

A simple design from the last century

More in the magazine Young technician“Drawings were offered on how to make a jigsaw machine with your own hands. Moreover, the design does not involve an electric drive; the drive is powered by muscular force, like a knife sharpener.

The machine consists of main parts:

• bed (A)
• work table (B) with slot for canvas
• lever system (B) for holding the saw blade
• flywheel (G), which is the primary drive pulley
• crank mechanism (D), combined with a secondary drive pulley, and driving the levers (B)
• pedal assembly (E) with a crank mechanism driving the flywheel (D)
• saw blade tensioner (W)

The master uses his foot to move the flywheel (D). Using a belt drive, the crank mechanism (D) connected to the lower arm (B) rotates. A file is stretched between the levers; the degree of tension is regulated by a lanyard (G).

With a well-balanced flywheel, sufficient smooth running of the saw blade is ensured, and such a homemade jigsaw machine allows you to massively cut out the same type of workpiece, saving time and effort. In those days, jigsaw files were produced in the form of a flat, unidirectional strip.

Therefore, to obtain patterns of complex shapes, it was necessary to rotate the workpiece around the canvas. The dimensions of the workpiece are limited by the length of the arms (B).

From a mechanical jigsaw to an electric one one step

The foot drive cannot provide real freedom of action and uniformity of the saw stroke. It makes more sense to use an electric motor for the crank mechanism. However, if you use a tabletop jigsaw occasionally, there is no point in making a stationary structure with its own motor.

You can use home power tools. For example, a screwdriver with a rotation speed controller.
The materials used are literally from wood scraps and old trash. The only critical part is the bed. It is better to make it from durable plywood with a thickness of at least 18 mm.

We make all connections using wood screws; the joints can be coated with PVA glue. From the same material we assemble a support pedestal for the lever rod. The design of the support should not have any play; the subsequent accuracy of the entire machine depends on its strength.