Polystyrene foam is a durable, lightweight and very good thermal insulation material. It is very easy to work with it. But there are some nuances in working with this material.

Because it is made in the form of slabs large sizes, then very often you need to resort to pruning them. This can be done using and regular knife, but no matter how carefully they try to do it, they will not succeed.

And all because mechanical impact will disrupt the structure of the foam. That is why experts recommend using only a cutter or, as it is also called, a foam cutter for such actions.

Such multifunctional tool You can, of course, buy it, but if you make it yourself, you can adapt it to your needs and, of course, save money.

If you plan to work with a cutter for industrial purposes, then it is still better to buy an electrical device that will be designed for large and frequent loads.

How to do it yourself

The need for a cutter can arise at any time if you do some household chores quite often. Perhaps someone has encountered the need to make a part using a special mold for casting with epoxy resin.

And to do this, you will need a piece of foam. For example, you can use foam from TV packaging. It is necessary to draw on it using a ruler, compass and ballpoint pen places where holes will need to be made in the future.

This is where the need arises electric cutter. After all, it will be difficult to perform this action without spoiling the foam sheet without such a tool. Let's consider one of the options on how to make a device of this type at home.

A homemade cutting device can be various designs. It is on it and the type of cutting that will depend on how exactly the cutter copes with its goals.

Species

Before you start making a cutter, you should decide for what purpose you need it, because depending on the purposes, they are divided into several groups:

• with metal work plate;
• for linear cutting;
• For figure cutting.

Stages of creation

Since linear cutting is the most common, let's look at this option in more detail:

1. Cutting part. To do this you will need nichrome wire, approximately a spiral with a diameter of 0.6 mm. It can be taken from old electric stoves or other heating electrical appliances. The length of such a wire should be 14 cm (its resistance will be 2 ohms).
2. Transformer application. For everything to be correct, the first step is to calculate the voltage and current for heating the cutting part. This can be done using the formula - Ohm's law I=U/R. Thus, you can determine the power of the power transformer.
3. Making a cutter. The base can be made of any metal, but its length must be at least 11 cm. Next, an insulator - a PCB plate - must be attached to the end. Now fasten the contact groups along the edges of the plate; they can be removed from the electrical outlet. It is into these contacts that it will be possible to attach spirals of different shapes.
4. How does the cutter work? After the cutter is plugged in, the wire will heat up and become slightly reddish in color. This is exactly what matters, since a heated cutter will make it possible to easily and quickly cut the foam, which will not peel off.

Important to know: Having received such a device, in just three minutes it will be possible to cut the required shape from a sheet of foam plastic.

Be sure to follow all safety rules so as not to injure yourself and others. After all, the power of the cutter is enough to damage any part of the body during operation. And connecting to electricity further increases the risk of injury.

Step-by-step production of a thermal cutter

You can make a thermal cutter using a burner or soldering iron and an old jigsaw. Let's consider the manufacture of such a device step by step:

1. 1. Sleeve. Initially, you need to make the main and most difficult thing - the bushing. So, to do this, the plate must be bent and turned. Next, you need to make a hole in the sleeve; the thread will be inserted there in the future.
   2. Burner. You need to cut off the wire that leads to the hole, take suitable connectors, then solder it to the break point.

Please note: Such areas must be isolated.

1. 1. After everything is done, you can connect the thermal cutter. Old jigsaw cut in half. IN top part you need to attach the pre-prepared claw plate to the screws. But we attach the bottom to the base using self-tapping screws.
   2. Insert the sleeve into the foot. Now with special attention From the hole you need to use a plumb line or a square to mark a point under the hole of the sleeve. Next, drill a hole in the base. The diameter of the hole in the base should be about 5 mm.
   3. Thermal cutting machine So, when everything is ready, you need to straighten the nichrome wire. To do this, you should turn on the burner at full power and touch the nichrome with the wires from it. Everything must be done in such a way that there is a distance between the wires equal to the height of the device. If the thread does not heat up, but the burner begins to hum, find a thinner wire. This is necessary because the one you selected does not have enough resistance.

Take note: nichrome should be hot, but should not get red hot. If the string turns red, you need to reduce its heating using the regulator. In the event that the nichrome is red even at a minimum, then a compensator should be left 5-10-15 cm above the spring of nichrome wire. And only after that you can make contact.

1. Operation of the device. With a pre-installed guide, you need to cut foam dies to a given thickness, or you can make the shape curly.

Application

If you are making repairs or doing wood cutting, or you need to cut a piece of plywood, then an electric cutter will be very useful for you, which can also be used even for cutting thick fabric.

If you think that for all of the above actions you will only need to use a thermal knife, or a hacksaw will suffice, then you are mistaken.

After all, a hacksaw will not make the edges smooth and not torn, as is the case with a cutter.

Standard construction has long since sunk into oblivion. This is noticeable when visiting areas low-rise construction. Each home is individual and unique. But every household requires insulation, if it was not provided for during the construction process. It is unlikely that foam manufacturers will produce slabs custom size for small order volumes. You'll have to cut it. But how to cut polystyrene foam when installing thermal insulation for a building with your own hands?

Foamed polystyrene foam can be easily processed by cutting. Before cutting polystyrene foam at home, you need to determine the required accuracy and cleanliness of the cut. After that select necessary device for cutting foam from the following:

• saw (hacksaw);
• string;
• thermal cutter;

There is no clear answer to the question: “What is the best way to cut?” as long as there is no certainty regarding the volume and linear dimensions of the parts being processed.

Foam plastic should not be milled due to the extremely low mechanical stability of the material.

Just cutting

When carrying out work on insulating foundations, underground communications, floors under screed, facades under plaster, special precision and evenness of the cut are not very necessary. Moreover, if the building has a simple facade configuration. In this case, you can use hand tool for cutting foam plastic: knife, hacksaw, metal string.

Their use will lead to the loss of granules at the edge of the cut and the formation of a not entirely smooth edge. The presence of a loose fit of the slabs can be leveled by filling the voids with polyurethane foam.

Straight-line cutting with a finely serrated knife is justified with a material thickness of 50 mm; a hacksaw can be used to cut insulation up to 250 mm thick. You can use a serrated kitchen knife to cut foam. We buy a hacksaw with a fine tooth at a hardware store.

To make it easier to use the string for cutting foam plastic (you can use old strings, for example from a guitar, that have a spiral winding), we install wooden handles at its ends. They cut the insulation with a back and forth motion, as if using a two-handed saw. Large slabs can be cut by two people. In this case, the sheet to be cut must be secured.

Before cutting the foam, cutting edges must be treated with liquid lubricant. This will create a certain comfort when working (improves gliding, reduces noise).

Curly carving on foam plastic using this tool is extremely difficult.

We use a thermal knife

Cutting polystyrene foam with your own hands using a thermal knife is justified for slab thicknesses up to 50 mm. To cut a piece of polystyrene, the hot knife is advanced at medium speed, which ensures a quality cut without tearing out fragments or melting the edges.

Purchasing a longer blade for this device is not entirely beneficial. When cutting by hand, it is impossible to cut strictly perpendicular to the surface. The end of the sheet will have a bevel, which is extremely inconvenient during installation. In order to better cut a thick sheet, it is necessary to cut on both sides, deepening the hot knife to half the thickness or a little more.

We make and use a thermal cutter

To cut polystyrene foam with your own hands, devices with a thin hot element are most often used. General principle The actions of any thermal cutter for foam plastic are the same.

The heated element separates the material, followed by sealing of the opened volumes. Using thermal cutters for foam plastic, we get a perfectly smooth cut, which is very important for quality work on insulation.

Purchasing a factory-made foam cutting machine is not economically feasible.

Only if you don’t decide to do this professionally and permanently. In most cases, when cutting out shaped elements is not required, you can use homemade cutter for foam plastic.

Making a foam cutter with your own hands is quite simple and quite inexpensive. After the work is completed, it will not lie like a dead weight and take up space. It can be assembled and disassembled as needed. If there is no need, its components can be used for other purposes.

Before you make a foam cutter, you need to prepare everything you need:

• work surface blank;
• nichrome wire;
• laboratory adjustable transformer (LATR);

Chrome-plated nichrome wire can be used without a step-down transformer, but this increases the risk of electric shock.

• electrical wire, fastening for it,
• springs for thread tension;
• adjustment mechanism.

When manufacturing and using the device, follow the rules for the design and operation of electrical installations.

To make equipment for cutting foam plastic, start by marking and trimming the working surface. Determine its geometric dimensions in accordance with the dimensions of the cut slabs. It is better if the table surface is larger than the sheet area.

We install racks (supports) with the possibility of adjustment. To do this, you may need a small device in the form of hex bushings with internal threads. They will make it easier to adjust the cutting height. The cutting wire is tensioned using springs. We lay and fasten the electrical wire on different sides of the thread. We connect the other end of the cable to the LATR (if there is no LATR, it can be replaced by using an autotransformer to charge the car’s batteries). The device is ready for use.

Cutting polystyrene foam at home should be carried out in compliance with safety measures. When heated, toxic smoke is released. Therefore, we cut out parts from foam plastic either outside, or use respiratory protection in a workplace equipped with exhaust ventilation.

Using such a device for cutting foam plastic allows you to speed up the process of preparing insulation fragments as much as possible.

We use automated systems

The delights of architectural design also require insulation. In order to preserve their expressiveness, it becomes necessary to manufacture complex elements. How to cut out such details? More affordable option- processing of insulation by milling. But milling of foam plastic is not carried out for the reason that the cutter, when rotating, tears out quite large pieces of material.

Dense polystyrene foam has higher mechanical strength and is easily milled. Anything can be made from it: a letter, a number, a graphic element of any complexity. Even a hedgehog. It is recommended to cut penoplex on large angular velocities at average linear feed. To install the manufactured fragments on the façade, ceresite is used.

Laser cutting polystyrene foam is the most advanced technology, combining hot cutting tool and the accuracy of the automated system. Laser cutting of foam plastic allows us to produce parts of any complexity with the highest precision with a minimum level of waste. Laser cutting of foam plastic ensures absolutely smooth surface cutting using a hot beam of directional light moving with high speed. There are no restrictions on the thickness of the material and the complexity of the element.

The choice of cutting equipment used for foam boards and extruded polystyrene foam must be conscious. Reply technological requirements By finished products and be economically feasible.

Polystyrene foam is used in many construction work. It has good thermal insulation. However, this is a rather fragile and crumbling material. Therefore, when cutting it, special equipment is used. Otherwise, the edges will be uneven, and the material itself will lose its thermal insulation qualities at the joints.

Special equipment is on sale. However foam cutter you can do it yourself. This will save a lot of money family budget. How to create different options tool for cutting foam plastic, it will be interesting for every master to know.

Tool type

Creating hand cutter for foam plastic, should be studied existing varieties this tool. There are mechanical and electrical varieties. If the foam product is small in size and cutting accuracy is not so important, you can give preference to the first option of the tool.

However, in order to ensure a tight fit of the foam plates to each other, it is necessary to ensure high accuracy cutting The edges should be smooth. In this case, it is possible to create an insulating layer high quality. Its heat loss will be minimal. When uneven cutting occurs between joints, large gaps. Through them, heat from the room will escape to the outside.

Professional designers and builders use exclusively electrical equipment for cutting foam. It is quite possible to create such a tool at home.

Simple electric cutter

Considering how to make a foam cutter, you should study the design of the simplest equipment of this class, which runs on electricity. In this case, you will need to prepare a thin guitar string and several batteries (for example, from a flashlight).

The operating principle of this equipment is simple. The battery structure forms a single unit. A guitar string is connected to it. When electric current passes through the circuit, it will heat up. It is in this state that the string can easily cut a sheet of foam.

When using such a tool, the material will melt. The string heats up to 120 ºС and even more. In this case, it is quite possible to cut several large slabs of foam. If you need to do a large amount of work, this option will not work. The batteries will run out quickly. We will have to provide an option for connecting the system to a household network.

Types of electric cutters

Electric foam cutter can be used for various purposes. This will determine the type of design and overall performance characteristics of the equipment. There are three main types of homemade cutters.

The first category is used for linear cutting. The second group includes cutters that perform shaped cutting of material. Designers use them. This type is used less frequently for home repairs. There is also a tool with a metal working plate.

Such equipment must have a step-down transformer in its circuit. It must be rated for a minimum power of 100 watts. The secondary winding of the transformer must have a cross-section of at least 1.5 mm. It must withstand a voltage of 15 V. In this case, you can achieve high results work.

Features of work

Studying how to make your own handheld foam cutter, it is also necessary to consider the operating features of such equipment. As mentioned above, such an instrument has a string. It heats up and melts the surface of the foam.

This material reacts quite poorly to heat. Therefore, it is important to maintain the technology of the entire process. Cutting using a hot thread is done quickly. This allows you to achieve high quality cuts.

Checking the string heating level is easy. To do this, a test is carried out on a test piece of polystyrene foam. If, when immersing the thread, long pieces of material remain on it, it has not yet warmed up enough. If there is no foam on the string at all, then the temperature is too high. In this case, you will have to cool the instrument a little. With proper heating, it is possible to perform fast, accurate cutting.

Line cutting cutter

Linear DIY foam cutter will allow you to create blocks from the material of the required dimensions. This significantly speeds up the work of the master. If necessary, this tool can be used to cut circles, triangles or squares into the foam.

Two racks are installed vertically on the table surface. Two insulators are attached to them. A nichrome thread is stretched between them. This alloy heats up quickly, providing sufficient temperature for cutting. A freely hanging load is passed through one of the racks. Contacts from the transformer are connected to the thread.

The current passing through will heat it up. It will be taut all the time thanks to the weight hanging from one side. This is necessary, since the string may sag when heated. If desired, the design can be modified by adding a spring instead of a load. However, the original version is easier to implement.

Line cutting process

Considering how to make a foam cutter with your own hands, you also need to understand how to work with them correctly. Cutting can be done vertically or horizontally. To do this, the thread is pulled in the appropriate position.

If the string is stretched horizontally, you can use it to make the same cuts. The foam is pulled evenly across the table. The thread will cut it evenly into the required pieces.

When cutting a structure vertically, a frame made of metal or plywood is added. A holder is installed on it. An insulator and a nichrome string are connected to it. On its other side a load is suspended. It will go through a hole drilled in the table. It must be large enough and covered with a special insulating material. Next, you can perform vertical cutting.

Shaped cutting

If you need to cut enough large sheets foam or create decorative elements, sculptures made from this material, a special type of equipment is used. You can also make it yourself. It's manual foam cutter. It is made on the basis hand jigsaw or hacksaws. In them, the cutting element is replaced with a nichrome string.

If you need to create shaped elements, you can make several tools of different shapes. A wire is connected to the handle of the jigsaw. It must be carefully isolated. Otherwise, it will be unsafe to work with this equipment. A nichrome string is attached to the wire contacts. This can be done using nuts and screws with washers.

It may also be suitable for creating such equipment pulse soldering iron or wood burner. This tool is considered convenient. Their working element is removed from such equipment and replaced with a piece. In this case, the threads can be given different shapes.

Cutter with metal plate

Exists foam cutter, in the design of which it is used To create this equipment, you can remake a soldering iron. Equipment with a power of 60 W is suitable. Removed from the device heating element. Instead, a plate is installed here.

One side of the copper blank needs to be sharpened. This will allow you to create a more accurate cut. The sharpening angle should not be made too large. The cutting will be done using heat. To find the required level, you will have to experiment on a test piece of foam.

This method is also used by craftsmen of various skill levels and profiles. If necessary, the copper plate can be replaced with a steel billet. This option will require more effort when sharpening. But with the help of such a tool you can cut denser polymer materials.

Choosing which one foam cutter more suitable for the work of a master, you should take into account the recommendations professional builders. The greater the volume of work performed, the more complex the design will be. A simple battery-powered cutter is quite suitable for cutting several blocks. However, to perform a large amount of work, preference should be given to network types of equipment.

When cutting, the foam heats up. At this moment, they stand out from it into environment substances unsafe for human health. Therefore, work is performed in a well-ventilated room or outside.

In order not to make a mistake with the cutting configuration, you should mark all the lines with a pencil before starting the action. This will avoid mistakes when cutting. These simple recommendations will allow you to do the job quickly, correctly and safely.

Having considered what options for foam cutters you can make with your own hands, every master will be able to choose best option for yourself.

Polystyrene foam is a fairly practical and lightweight thermal insulation material. It is often used to create various crafts. However, in the process of working with it you have to deal with one trouble - the material is difficult to cut. Polystyrene foam is produced in the form of large slabs, and in order to divide the panel into fragments, you will need to cut it.

Using a saw or knife for this purpose will not work. This is due to the fact that with any mechanical impact the structure of the material is destroyed. To avoid this, you will need to design a foam cutter with your own hands.

The simplest device for cutting foam plastic

The simplest foam cutter is easy to make with your own hands. For this purpose you will need to use the thinnest guitar string. In addition, you should prepare 5 large batteries for a regular electric flashlight. They must be connected in series. A string is connected to the ends of the device, thereby completing the electric arc. Current will flow through the string, heating it.

When using such a device, the foam sheet will split into two parts immediately after touching the string. In this case, the material will melt along the cut edges. With this processing, the cut is as smooth as possible. The string for cutting foam must be heated to a temperature of at least 120 degrees. However, it should not exceed 150 degrees.

Checking how hot the string is is quite simple. During cutting, stuck pieces remain on the edges of the material. If they are too long, the string is not heated enough. In the absence of such pieces, it can be judged that the string is overheated.

When using such a simple device, about 3 foam panels can be processed. However, it is not suitable for large volumes of work. The batteries run out pretty quickly. To extend the operating time of the cutter, you will need to build a device that runs on mains power. A few simple tips will help you understand how to make a foam cutter.

Homemade electric cutters for foam plastic

If we divide such devices into groups, they should be classified as follows:

• linear cutting device;
• thermal cutter, which is used to perform shaped cutting;
• device with a metal plate.

However, despite this classification, each device has one common element. To create cutters for foam plastic, you will need to find a step-down transformer. It is necessary that this element can withstand 100 W.

Line cutting cutter

To create such devices, you should prepare a workspace. Usually a table is chosen for such purposes. Two vertical risers are attached to it. Each of them must have an insulator. Between the insulators it is necessary to tension nichrome thread. A freely hanging load is suspended from it. The nichrome thread is connected to the contacts connected to the step-down transformer.

The operating principle is quite simple. The nichrome thread heats up when connected, which makes it easy to cut foam. Thanks to the suspended weight, the thread remains taut. A weight is necessary because when heated, the thread begins to sag.

The moving foam is cut with nichrome thread quickly and evenly. How thick the processed sheets will be depends on the height of the thread above the working surface of the table. The main thing is that the foam is fed at the same speed throughout the entire cutting period.

To cut sheets vertically, you will need to use a cutter of a different design. In it, the cutting wire is tensioned in a vertical position. In this case, the working surface is made of chipboard. You need to attach a frame to it. It is better if this element is made from metal profile. However wooden blocks will fit well.

The frame is equipped with a paw-holder, on which it is suspended nichrome wire. A weight is attached to its end. The wire is passed through a hole made in the working surface. To prevent it from touching the wood, the hole is protected from the inside with a metal hollow tube.

When using thermal cutters, foam plastic is not only easily cut into specific blocks. From large slabs you can cut out various geometric shapes, such as a square, a semicircle, a triangle. Before work, just run a marker along the surface of the slab, marking the cut line.

Shape cutter

When working with large foam sheets, using a stationary cutter will be difficult. Such panels hardly fit on the desktop. In these cases, a handheld foam cutter is used. This tool is often made from a jigsaw. The cutting blade in these tools should be replaced with nichrome wire.

It’s quite easy to build such an electric cutter with your own hands. To make cutting shaped elements more convenient, you can make several devices that have various shapes. First, the jigsaw should be removed cutting blade, and connect the wire to the handle. The voltage will be low, but the handle and other metal parts should be insulated. Nichrome wire is connected to the cable. Nuts are used for this. The wire is bent in a certain way.

You can use a soldering iron as a cutter for shaped cutting of foam plastic. It needs to be modified a little. The device already has an electrical wire in its design. To create a foam cutter from a soldering iron, you will need to replace the element that heats up with nichrome wire.

This device is highly convenient to use. Thanks to this product, it is possible not only to cut slabs of material into smaller sheets, but also to make recesses in them.

Metal plate cutter

There is another way to convert a soldering iron into a foam cutter. To modify the tool, you simply need to replace the tip with a copper plate. Steel will also work, but it takes longer to heat up and is more difficult to sharpen. However, with proper sharpening, a steel plate can cut any synthetic material, including polystyrene.

One side of the plate must be carefully sharpened. Sharpening can be done on both sides. It is necessary that the sharpening angle is not too large. The cutting of the material is carried out not only by the blade, but also by the blade of the plate. Such a cutter has one drawback - you will have to empirically find optimal temperature heating the knife.

Conclusions

Making a foam cutter with your own hands is quite simple. The methods listed above will help you understand the structure and operating principle of the foam cutter. Such devices are practical and easy to assemble. Each method has its own advantages, so home craftsmen can choose the most suitable one, depending on the available materials.

Polystyrene foam is a good heat insulator, characterized by durability and low weight. It is used to create a variety of shapes, blanks and models, as an excellent insulation material. It's quite easy to work with. But often such material is produced in the form of blocks with large geometric parameters. Cutting them with a saw or knife is very inconvenient. Products crumble, which disrupts their structure.

Problem with opening thermal insulation material solves the foam cutter, often called a cutter. You can purchase it at a hardware store or make it yourself. In the second case home handyman gets at his disposal a tool that suits him in all respects.

Elementary carver – half an hour and you’re ready!

The simplest tool for cutting sheets of foam plastic (foamed polystyrene) can be made without the slightest difficulty using 4-5 flashlight batteries and a regular guitar string.The process for creating a carver will be as follows:

• the batteries are connected in series to form one unit;
• A guitar string is attached to the ends of the resulting module.

As a result of these actions, a tool with an electric closed arc is obtained. The current passing through it will heat up the string. In the area of ​​its contact with the material being cut, the process of melting and cutting of the polystyrene foam sheet into two parts will be observed.

For the described homemade thermal knife to work, the string must be heated to 130–150 °C. With this simple tool you can cut 1-3 blocks of foam. It is not advisable to use it for cutting a large number of sheets because the batteries will run out very quickly.

Types of electric thermal knives and their features

If a master uses polystyrene foam regularly and performs large volumes of work, it is advisable for him to make a tool with his own hands that operates from household electrical network.Such homemade thermal knives that do not require separate chargers, are used for:

• linear cutting;
• figured cutting.

They use a nichrome thread or a metal plate as a working thermoelement. A mandatory unit of such devices is a transformer that reduces the voltage (Figure 1). Its windings must meet the following requirements:

• cable cross-section – from 1.5 mm;
• voltage - from 100 V (primary winding), 15 V (secondary).

Experts recommend connecting the step-down device to an autotransformer (LATR), which allows you to smoothly adjust the output voltage. If you don’t want to purchase such an expensive device, you can do otherwise:

• place a switch on the secondary winding taps;
• equip the step-down transformer with a rheostat.

Linear cutting device - how to make?

A homemade thermal knife for cutting flat sheets of expanded polystyrene foam is simple design. The principle of its creation will be understood by any craftsman.

The basis of the structure is a frame made of steel profile or wooden blocks. A working surface made of particle boards and thick plywood is mounted in its lower part. Some craftsmen use PCB sheets for its construction.

The function of a working surface can also be performed regular table or a workbench. Then there is no need for a frame. And the process of constructing the structure itself is as follows:

• On the table (other flat surface) two vertical supports are mounted, which are secured with insulators.
• A transformer is connected to the latter through electrical contacts to reduce the voltage.
• Nichrome wire is stretched between the insulators. A special weight is suspended from it. It is needed to tension the thread.

This foam cutter operates simply. An electric current passes through the thread, heating it, which leads to stretching of the wire. The load does not allow the latter to sag.

The heated nichrome thread easily cuts the foam block horizontally, which is moved by hand. As a result, flat sheets of insulating material are obtained. Their thickness is determined by the distance separating the stretched wire from the working surface of the table.

When performing the described operation, it is important to ensure the supply of polystyrene foam at the most uniform speed possible.

In cases where the material needs to be cut vertically, the design of the cutter is slightly modified. The frame must be additionally equipped with a holder. Hang a nichrome thread and a weight from it, passing the latter through a hole pre-drilled in the table. It is advisable to install a hollow metal pipe in it, which will protect the master from burns when the wire is heated.

Rules for making tools for figure cutting

If cutting at home will involve sheets of foam plastic that are large in thickness or geometric dimensions and do not fit on work surface Due to its parameters, it is recommended to make a thermal knife from a hacksaw or a hand jigsaw. The work is performed as follows:

• The cutting blade of the jigsaw (hacksaw) is removed.
• An electrical cable is connected to the handle of the tool.
• Nichrome wire is bent at a given angle.
• The figuratively bent thread is installed in the place where the canvas was previously located and secured with nuts and screws.

All metal elements on a self-made structure are insulated. If desired, you can immediately bend it under different angles several nichrome cloths. Then figured cutting will be more comfortable.