Types of planers - models of household units, DIY instructions. Do-it-yourself production of a rounding machine for wood processing Equipment for planing logs

For the construction of a wooden frame, it is necessary to properly prepare the source material. For this, special machines are used for processing logs. They differ not only in functionality, but also in the principle of operation.

Log rounding machine

After preparing the logs for the log house, it is necessary to process them. It consists in the formation of round timber having the same shape and geometric parameters. This greatly facilitates the further construction process.

The machine for rounding logs consists of a frame part on which a movable carriage is located. The workpiece is fixed on the front and rear headstock. Moreover, the first one has a dividing head for turning the beam relative to the cutting part. This is necessary for uniform processing of the entire plane.

A standard log house should be built from blanks of a certain size and quality. Therefore, when choosing a machine, it is necessary to take into account its following technical parameters:

minimum and maximum diameter of logs;
the thickness of the layer to be cut in one pass;
workpiece length.

Depending on the type of processing, machines for rounded logs can be with continuous movement of the cutting part and with intermittent movement. The latter are designed for the production of high quality blanks.

Choosing the right cutter is important. It will directly affect the degree of surface alignment, and as a result, the quality.

Log milling for a log house

After forming a flat plane, it is necessary to change the standard configuration of the workpiece. The technology of building a log house is to install logs on top of each other. As a result of this, cracks or sharp differences in wall thickness should not appear.

To solve this problem, it is necessary to use a cutter of a special shape, which is installed in the moving part of the machine. Unlike a band or disc cut, it should not form an even, but an oval recess on the mounting part of the workpiece. Thanks to this, the log house will have optimal wall thickness characteristics, which will affect the degree of thermal insulation.

Stages of milling a log for a log house.

Rounding. In this case, the cut of the workpiece must have a perfect round shape.
Calculation of the thickness of the recess for the formation of the mounting groove.
Choice of cutter.
Log processing, secondary check of its geometric dimensions.

But even after carrying out these works, it is still impossible to erect a log house. A final processing step will be required, as a result of which mounting grooves will be made.

The choice of cutting tool for a log house directly depends on the type of wood. Its hardness, number of knots and geometric dimensions are taken into account.

Machine for the formation of crown bowls

The final stage of work is the milling of crown bowls. They are designed to install the logs of the log house on top of each other. Additionally, with their help, they make internal partitions of the house.

The formation of mounting elements occurs only in accordance with the technical documentation. It indicates what shape the crown bowl should be in one place or another in the log house, its size and other additional parameters. In some cases, a log cabin of a non-standard shape may be erected. Based on the initial parameters, the manufacturing technology of mounting elements must have the function of changing the angle of inclination of the cutting cutter. It can be located at an angle from 45 to 90 degrees.

Additionally, the following parameters are specified in the machine settings:

diameter of processed logs;
forward and reverse feed speed;
frequency of rotation of the cutter;
power plant power.

Entry bushings must be made of special grades of steel and are an indispensable element of the machine equipment. Their shape directly affects the quality and degree of processing of logs for the log house.

An important point is the initial preparation of blanks, from which a log house will be bred in the future. First of all, this concerns the technology of harvesting and the choice of the optimal type of wood. You should also pay attention to primary processing.

Professionals recommend logging round timber in winter at sub-zero temperatures. At this time, the moisture content in the wood is minimal. In the future, during drying, the change in the original geometry will be insignificant.

It is important to correctly select certain sections of the log for the log house. It is necessary that the density of the material be maximum. To do this, choose a site from the rhizome to the crown. They are characterized by a small presence of knots and other defects. A log cabin from such a log will be of the highest quality.

The degree of curvature of the surface should not exceed 1 cm per 1 r.m. The same applies to the deviation from the diameter of the base and top. If this parameter is greater than the above, the log must be rejected.

The video shows an example of the work of log machines, from which a log house will be built:

Woodworking equipment plant ENERGOTEH-ALTAI

Guarantee period:

The warranty period for this equipment is 1 year.

Specifications:

Product description:

The machine is designed for planing timber or boards up to 260 mm wide.
There are two working units on the machine, one for planing, and the second for chamfering if necessary. The workpiece is fixedly fixed on the guides. The movement of the machine is carried out manually.
One of the most widely demanded and popular elements in woodworking enterprises is the sba 260 beam planer. The use of this unit can significantly speed up the work with wood and increase the productivity of the enterprise.

Wide range of uses

Today it is difficult even to imagine the production of wood products without its preliminary planing. This procedure involves processing the boards in such a way that, after completion, the workpiece corresponds to the selected size. At home, hand tools will be quite enough, but for logging production you need a reliable one, namely a professional planing machine. Unlike hand tools, automatic planers have the following characteristics:
- high productivity - there are machines of various capacities, but the sba 260 machine guarantees a large output of planed timber in a short period of time;
- accuracy of cutting - when the machine is operating, the dimensions of the finished product coincide up to a millimeter;
- excellent quality of the planed material - all blanks have a smooth surface;
- full automation of the process - on a production scale it is much more profitable, since the use of such a unit provides a large yield of planed product.

In addition, planers are characterized by a high level of safety, which makes this equipment incredibly in demand for modern production.

The design and purpose of the device

The machine for planing timber sba 260 is used in production for processing timber and boards up to 260 mm wide, and the length of the raw material should not exceed 6000 mm. A similar machine for cutting wood is characterized by the presence of two working units. The first of them is planing - for processing boards, and the second node is intended for chamfering, if necessary. The cutting process is absolutely safe and proceeds quickly, since the workpiece is securely and immovably attached to the guides of this unit.

How to make the right choice

When buying a planer for production, you need to carefully study the characteristics and weigh the pros and cons. After all, the efficiency of work depends on how correctly the machine is selected or. The width should be taken into account - this is the maximum allowable width of the processed board, and the depth of planing - how many millimeters of material are cut off with knives in one go. You should also consider how many boards will be processed. Based on this, you can purchase a household or professional planer.

Planing machines are indispensable in modern production and in many private households. In order for the purchase to be rational and profitable, you should address such questions only to a respectable and reliable store. You can also buy machines from our dealers in Ufa, Krasnoyarsk, St. Petersburg, Yekaterneburg, Moscow and other 50 cities in 7 countries of the world.

Since wood is one of the oldest building materials and has been in use for a very long time, there are many methods that can be used to process this material. One of these methods was the planing of wood. The operation is quite old, but it is with the help of it that it is possible to give the desired shape and size to the workpiece.

Modern woodworking

To date, there are two ways to carry out this operation. It can be done manually, or it can be done mechanically. If we talk about the mechanical style of processing, then the most widespread operation is carried out on a planer.

Since today the technologies are developed quite strongly, the machines began to be equipped with program control, robotic complexes, automatic lines. All these improvements have led to the fact that the processing on the machines has become better, and it has also been possible to significantly improve the accuracy.

Planing technology. general description

Wood planing technology or the general technological process is that part of the process during which the shape, size or properties of the processed material are changed. In addition, since wood is a rather demanding material for processing, the whole process is divided into several stages. The first stage is drying, because if the workpiece is not dried, then it will definitely warp in the future. This is followed by the stage of cutting the material into blanks of the desired size. The next stage is just the planing of wood, or any mechanical processing of wood, the purpose of which is to give the desired shape and fit to the desired dimensions.

It should also be noted that the sequence of technological operations may vary. It depends on the type of raw material, on the method of finishing, on the organization of production, etc.

The essence of planing wood is that all roughness, warping and other defects are eliminated from the surface of the workpiece. It is worth noting here that most often these defects occur after the wood blank passes the sawing stage. Sawing is the process of cutting wood, in which the direction of the straight line coincides with the direction of the working movement. That is, sawing and planing of wood are two main processing methods, the technology of which is quite simple, but it is with its help that all wood raw materials take their shape.

Manual planing. Tools for the job

As the main tool for work in manual processing is a planer. With its help, all planes are processed. You can also use jointers or sherhebels. The body of almost all plows consists of such parts as a block, horns, stop, knife, wedge. The wedge is necessary in order to be able to fix the knife in the block. For manual planing of wood, a knife is used here, which is used as a steel plate. The thickness of the element is 3 mm, and it is made of carbon tool steel grades U8 or U9. The lower part must be hardened.

The block is presented in the form of a rectangular block of wood. The front part of this detail at the sherhebel or planer is equipped with a horn mounted on top. The jointers behind the knife have a handle. In addition, the block has a sole. It is this part that wears out the fastest in the area that is located in front of the span. For this reason, in some cases, a pentagonal insert made of the most durable wood is glued into a regular sole. When planing wood with a planer, it is necessary that the knife lies flat against the back of the notch. To do this, it must be made perfectly flat. There is also a stop behind the end of the knife, which is necessary so that the handle does not rub your hand during operation.

Sherhebel is a tool that is used only for primary processing. In other words, rough wood planing is carried out. The knife of this tool is presented in the form of an oval cutter. With its help, the surface layer is removed, however, after its work, rather deep hollows remain.

The next tool is a planer. Planing wood with this tool is also primary, and it consists of approximately the same elements as the sherhebel. The essential difference is that the knife here is made in the form of a rectangle, and its edges are somewhat sharpened so as not to pick up the wood during processing. It is used to level surfaces previously treated with a sherhebel.

Operation methods

Types of wood planing are divided into manual and mechanical, but they, in turn, can also be carried out in different ways. Before proceeding with the procedure itself, it is necessary to carefully examine the workpiece and determine in which direction the fibers go. It is also important to understand the degree of roughness of wood. There is an important rule. Planing of wood is always carried out in layers. In other words, you need to lead the tool in the direction of the exit of the cut annual and oblique fibers. This is important, as choosing the right direction will help make the whole process easier. In addition, there will be less roughness. While working with tools such as a sherhebel or planer, they must be held as follows: the horn is held with the left hand, and the tool rests with the right hand. If a jointer or semi-joiner is used for work, then the handle is taken in the right hand, the left palm is placed on the block.

Naturally, this operation must be carried out in accordance with strict safety rules. It is possible to carry out sawing and planing of wood only with those tools that are sharp and correctly sharpened, as well as correctly fitted with wedges. The sole of the tool must be perfectly flat. In addition, you can only clamp the workpiece whose ends are parallel and perpendicular to the edges. The material that is clamped on the workbench should fit snugly against it so that there are no bends.

After the planing of wood with a hand tool has been completed, you can not put it on the sole, put it on its side, with the sole away from you.

Mechanical restoration. Tools for the job

For the implementation of wood by this method, an electric planer is used. Models for work IE-5707A-1 and IE-5701A.

As for the first manual electric apparatus, it is most often used in carpentry workshops, if the place of work is equipped with a workbench. For planing wood with a planer of this type, it must consist of an electric motor, a V-belt drive, a cutter with replaceable knives, movable and fixed skis, a head, and a handle. The essence of the processing technology is as follows. The rotor of the electric motor rotates in two ball bearings. A fan is mounted on the shaft. In addition, a drive pulley is also fixed at the end of the shaft. The torque that the rotor creates is transmitted to the cutter using a V-belt drive. On this unit there is a possibility of regulation of depth of planing. To do this, the front ski can be lowered or raised. The equipment can also carry out roughing and final processing. The difference is that a grooved cutter is used for the rough cut, and a flat cutter is used for the final cut.

The second type of electric planer consists of approximately the same parts. The difference lies in the fact that the knife shaft is driven with the help, and not the cutter. The knife shaft itself consists of two knives.

Sawing and planing of wood OKVED 2: code 16.10

OKVED is the all-Russian classifier of types of economic activity. This document includes the following stages of wood processing:

Cutting cleaning or splitting lumber.
Manufacture of wooden railway sleepers.
Sawing and planing of wood, impregnation of wood with various chemicals to protect it from environmental influences.
Mandatory drying of lumber.
Production of unassembled flooring.

The All-Russian Classification of Economic Activities - OKVED for sawing and planing wood - is a document that also has several clarifying, child codes. The main entry is under the code 16.10.

Tool setting and operation methods

Before starting work, it is necessary to check the equipment. It is important that the blades on electric planers are properly set, sharp enough and properly sharpened. It is very important that the blades come out the same length and are flush with the back panel. Another important rule is that the mass of working knives must be the same. The electric planer itself must be grounded, and any adjustment, adjustment or repair can only be carried out if it is disconnected from the mains.

The operation of the electrical apparatus is carried out as follows. is connected to the network, after which, by pressing the power button, the electric motor will start. After the electric planer reaches the required speed, it can be lowered onto the wood blank. It is important that the workpiece is completely free of any debris, dust, dirt or ice if work is carried out in winter. It is very important that the planer lowers slowly enough, otherwise, when the workpiece and the knife come into contact, a push will occur, which is likely to destroy the lumber. The unit must move along the material in a strictly straight line. It is also worth mentioning that after the processing is completed for the first time, the machine is turned off, the wood returns to its original position and the operation is repeated.

It is also very important to observe safety precautions.

It is important to ensure that all live parts of electrical equipment are properly protected. In addition, only a person who has undergone special training is allowed to work with an electrical unit. It is also important to ensure that the knives do not touch metal parts during operation.

Planer

It is worth considering the device of this machine from the fact that it can be one-sided or two-sided. If a double-sided machine is used, then two adjacent surfaces of one workpiece can be machined at once. There are also machines with manual feed or with mechanized feed. If everything is simple and clear with manual feed, then for mechanical feed it is necessary that an automatic feeder be installed nearby. In some cases, a built-in conveyor feeder may be used instead. Also, these machines are equipped with devices such as chip collectors, which are used to collect chips and dust. It joins the factory exhaust network.

Preparation for operation

Preparation for work includes the stage of technical adjustment of the unit, as well as checking its performance. As for technical adjustment, it consists in the following. Knives that are installed on jointers must have a straight line shape. With the help of a ruler and a feeler gauge, the deviation from straightness is controlled. The gap that is allowed between the ruler and the blade is only 0.1 mm if the blade length is up to 400 mm. If the blade is up to 800 mm long, then the gap can be 0.2 mm. As in the case of an electric planer, the knives must be balanced in weight. The knives are installed sequentially. The device has a chip breaker. Blades of knives should protrude above this element by no more than 1-2 mm. To test the machine, it is necessary to have a control block, which is usually made from hard, dry, seasoned wood. It also has precisely machined edges. The cross section of the faces can be 20-30 x 50-70 mm and a length of 400 to 500 mm.

Technology of the machining process on the machine

When operating a planer, which has a manual feed, one worker is needed. The worker takes the workpiece from the stack and evaluates its condition. Excessively warped lumber should be discarded. If it is not strongly concave or warped, then it can be used, the product is placed on the table with the concave side. Next, the workpiece is pressed against the ruler with the left hand, and fed to the machine with the right hand. In this case, the end of the wood will move the fan fence. This will open access to the shaft with rotating knives. When the front part is processed, it is necessary, still holding the workpiece with your left hand, with your right hand, little by little push it forward, at a uniform speed. In this case, of course, you need to keep your hands at a safe distance from the knives.

If a planer with a mechanical feed is used in the work, then the feed rate of the lumber is calculated based on the maximum power of the electric motor. After processing, it is necessary to check the product. Deviation from the plane is allowed no more than 0.15 mm for every 1000 mm. The deviation of adjacent surfaces is allowed no more than 0.1 mm at a height of 100 mm.

When using this tool for planing wood, it is very important to ensure that there are no defects or inhomogeneities on the surface. If during operation the knife stumbles upon such a defect, the workpiece may twitch, and the worker's hand lying on the product may fall into the knife slot.

The most dangerous is the planing of wood that is quite thin, narrow or short. For this reason, if the machine has a manual feed, then there are restrictions on the dimensions of the workpieces. Length up to 400 mm, width up to 50 mm, thickness up to 30 mm.

Since ancient times, mankind has been using trees to build housing. This material is widespread, does not require complex preparation and retains heat well. Currently, the tree can be subjected to any processing to give the desired shape to the log. To obtain even logs with the same cross-sectional area, rounding machines are used.

Such an installation allows you to carry out various wood processing operations:

Tree rounding.
Groove making.
Edged board production.
Obtaining elements for parquet.
Cutting boards.
Beam production.
Milling of a smooth log.
Sawing wood on a gun carriage.

Rounding machines are used in sawmills, large industries and in private households. The main function of the equipment is to remove the top layer of wood through the use of a cutter and various types of knife tools.

Varieties of cylindering equipment

Depending on the technology, the log rounding machine is divided into:

Checkpoint - carries out the processing of wood during movement, without stopping.
Cyclic - when processing wood, the movement of the log is interrupted. The movement scheme is a cycle of operations.
And also cyclic installations are classified into two subspecies:
Cyclo-positional - the processing of the material occurs in the process of moving towards the tool
Cyclo - through - wood is subjected to woodworking with a tool that itself makes the necessary movements.

With the pass-through processing method, the log produces a linear movement, and the machine rotates. And the cyclo-through equipment provides for the movement of the log with respect to the axis, and the movement of the tool occurs by torsion. Cyclo-positional machines carry out rotating movements of the log, and the tool performs a rectilinear movement parallel to the axis of the workpiece.

According to the mechanism of operation, the machines are divided into:

Mechanical - assume the presence of an operator who adjusts the modes, configures, loads and unloads equipment.
Automatic - the entire processing scheme is performed by the machine. There are models where a person only needs to load the material.
Semi-automatic - the installation automatically performs only one cycle of operations, and then the person must start the mechanism again.

The machine for rounding logs in the case of a separate type gives different performance. Passage equipment is more productive, but inferior in terms of correct processing and the formation of pronounced roughness of the material.

Cyclo-positional installations give good clarity and high quality, but the output is much less. If we compare in terms of the occupied area, then much less space is needed to accommodate cyclo-positional equipment than for walk-through installations.

Features of machine tools for cylindering

The installation consists of the main blocks - a metal frame, front and rear headstock, milling cutters. Usually, square pipes serve as a frame, with guides for the movement of the power structure and the carriage. Headstocks are required to secure the log in the central part and to push the rotational action.

Milling cutters are the main running tool. They provide easy entry into the wood, reducing vibration and increasing accuracy. They are versatile and curly. The universal cutter is used for classical rounding, milling and selection of crown cups. The curly cutter is used when sampling grooves.

The cutters are equipped with knives that can be removed. If the resulting parameters of the log do not match, it is necessary to replace the knives. They are made of durable steel and are used for a long time.

To reduce the time and make it easier to place the log on the frame, levers are used that are installed in the center of the log. To select the crown cup, you need a secure attachment of the bottom bracket. Therefore, braking devices are used, placed at the ends of the carriage. If you need to get a longitudinal groove, then use a convenient wood rotation regulator.

The choice of a machine for the production of rounded logs

To select a machine, you should not rely on advertised settings. It is necessary to evaluate the proposed samples well. Of course, it is useful to visit the factories where such machines are used. Communication with the direct operators of the equipment will bring good results when choosing an installation.

The following models are widely represented on the Russian market: Rus, Sherwood and Termit. Sherwood and Russ equipment can be separate components, or be part of a woodworking system. The volume of the log that passes through these installations is 24 cm. There are models that allow larger diameters to pass. Such installations are used in the processing of various materials: birch, oak, ash, pine and others.

Of course, you can buy popular machines, but sometimes you have to remake them for your own needs. Therefore, a more practical way is sometimes the manufacture of a cylindering machine with your own hands.

Independent manufacturing of a machine for working with wood

A home-made cylindering machine is preferably performed using a sawmill. In order for the log to rotate, an electric motor is used, which is installed additionally. Instead of the front conical conical part, an emphasis is made, the bearing for which is the headstock located at the back.

The manufacture of the cutter occurs by collecting from the constituent elements. For the movement of the cutter, a rail is used. The installation resembles a milling machine, since the installation of the log takes place in the existing grooves, then torsion occurs. As a result, the cutter begins to move along the log.

A homemade rounding machine is mounted on a hard surface, preferably concrete. In the manufacture of the frame, sleepers or thick timber are also used.

Stages of machine assembly:

Assembling the frame, using a level to place it in a stable horizontal position. Usually the height of the frame reaches 20 cm.
Mounting of the power structure (front and rear headstock), on which the cable for attaching the electric cable is pulled.
Equipment of power racks with a stopper.
Providing grounding.
Connecting a motor that causes the log to twist. In this case, you should focus on the exact connection of the phases. If connected incorrectly, the direction of the power head will not match the direction of the buttons.
Checking the direction of torsion of the log. If the direction is wrong, it is necessary to replace the phases on the electric motor. It should be remembered that until the power phases are correctly connected, the rotational actions of the log and the engine are prohibited.

And also it is necessary to firmly fix the headstock, installing them simultaneously with the guides. The lines of movement of the axes of the racks should be similar. To do this, the exact length is measured between the longitudinal profile and the central part of the rack and between the nearest rail and the center of the headstock. These distances must be equal for both attendants.

The milling cutters are installed on a conical element, and they are fixed with bolts. It is necessary to maintain the balance of cutters and change the jump in sharpening knives.

After all installation operations, check the correct assembly and the horizontalness of the frame.

After a long period of standing without work of your machine or being in a humid room, you must withstand the installation in a dry room before starting to remove excess moisture.

Video: homemade cylindering machine.

Advantages of a homemade machine

A do-it-yourself cylindering machine has certain advantages:

Small amount of wood.
Obtaining material for any own needs.
Achievement of good quality of the received log.
Having a machine handy.

Of course, like any purchased machine, home-made equipment requires the purchase of component parts. But the processing of wood on their own equipment turns out to be more suitable for the personal purposes of using the resulting log. The achievement of certain technical properties of products occurs in the presence of self-made cylindering equipment.

The old masters managed to assemble a log house using one ax, but looking at their work, the tongue would not dare to call it clumsy. Unfortunately, I do not have such skill, so I wanted to somehow simplify and mechanize this process. I had a band saw on my farm, on which I cut logs into boards. To do this, I have long built to it all the necessary devices for fastening and orienting these logs.

After quite a lot of thinking and careful measurements, I found a place to install a special profile (“cylinder”) cutter on a band saw movable platform. There was also a place for the cutter drive electric motor. To this end, using electric welding, I attached a powerful metal corner with shelves 100x100 mm to the platform, and already welded a corner in the form of a platform to it, on which I installed both a cutter on bearings and a drive motor. The axis of rotation of the cutter was oriented in space so that it was strictly perpendicular to the longitudinal axis of the log, located exactly the same as when sawing.

Thanks to this installation method, the cutter can, together with the band saw platform, move in height and at the same time along the log. Therefore, it is enough to set the log exactly along the axis of movement of the cutter and, turning on the electric motor, start milling. The speed and depth of milling depend on the selected processing mode. The number of passes is affected by the condition of the surface to be processed (knotty, curvature and other defects).

To place the log exactly in the center of the rotating cutter, I had to additionally install a guide from a 050 mm pipe on a stationary platform on which the processed log is attached. It is located strictly in the center of the cutter and perpendicular to the axis of its rotation. To find the exact location of this guide, I used a regular plumb line, after making a mark with a felt-tip pen exactly in the center of the concave part of the cutter blades.

This guide serves as a location for a height-adjustable support for the front end of the log (where processing starts). The adjustable post is made of a threaded shaft with a matching nut. The lower end of the shaft is free, and a \/-shaped support for a log is welded to its second upper end. The free lower end of the threaded shaft is inserted into the tubular rack and rests on the nut. Two levers are welded to the nut so that it can be rotated without a key, raising or lowering the front end of the log up or down. For fixing the far end of the log, a support that is not adjustable in height is installed.

Before starting milling the upper surface of the log, it is necessary, without including the rotation of the cutter, to pass it over the log placed on the supports. This is necessary not only to make sure that the log and cutter are “aligned”. It's no secret that all logs have a certain taper. Some are larger, others are smaller, but when installing a log on supports, the surface to be treated must be in a strictly horizontal position. This is what the height-adjustable support for the front end of the log serves for. When sawing logs into boards, as well as when preparing logs for a log house, it is more convenient to process them when they are with the thin end towards the operator, so that the processing process starts from the thin end.

Having milled the upper surface of the log for a log house with a profile (“cylinder”) cutter along its entire length, you can proceed to subsequent processing. To do this, the log on the supports is rotated by 180 °. Then, with a band saw, the upper part of the log is cut off along its entire length (see photo 1), so that the cut width is at least 100 mm. It is this width that a semicircular longitudinal groove should have on the lower supporting surface of a log prepared for assembling a log house.

The easiest way to choose such a chute would be a milling cutter with an appropriate knife profile. But for this, it would be necessary to replace the cutter, that is, reinstall it again, adjust and adjust everything. And this is too long, inconvenient and troublesome. So I came up with another idea. To form a concave surface on the supporting part of the log, adjust an electric planer. The only condition was that the width of the treated surface must be at least 100 mm. For this, a tool from one of our domestic manufacturers with a power of 2 kW with a planing drum width of 100 mm was almost ideal. In order for them to be able to form the surface of the desired profile, they had to make knives of the appropriate shape and slightly modify the body of the electric planer itself.

Refinement of the electric plane turned out to be not too difficult. Firstly, in the sole of the planer, in the place where the blades work, I bored holes in accordance with the geometry of the new planer knives. And secondly, in order to limit the depth of planing, I installed an overlay on the sole of the planer that repeats the shape of the knives.

I cut this overlay from an oak plank and attached it to the sole with screws. It turned out to be not much more difficult to choose a semicircular chute of an ideally regular shape along the entire log with such a modified planer than usual - to cut a flat flat surface.

In fairness, I want to note that my technology for preparing logs for a log house has its drawbacks. Thus, the entire processing cycle of the workpiece cannot be performed with the band saw blade installed on the machine, since it is impossible to use the cutter without removing the saw. And every time you take it off and put it on - it's simply unthinkable. Therefore, you first have to process several blanks of logs with a cutter at once, then put the saw blade in place, make a cut, and only after that complete the work with an electric planer of the entire batch of prepared logs. But the accuracy and cleanliness of the surface treatment of all blanks is such that it is impossible to achieve such with any ax!

To demonstrate this, we folded an impromptu wall from the logs prepared for the assembly of the log house. The logs in it are not fastened with anything, they are simply stacked one on top of the other, almost perfectly even. It was not possible to carefully lay only the topmost log, since it is quite difficult to lift such a weight from the ground to a height of more than 1 m and accurately place it. Therefore, we did not begin to build a wall higher. I think that everything is clear.

If desired, on such a band-saw-milling machine, it is quite possible to perform circular processing of logs. That is, to perform something like cylindering. But I try to do this only in exceptional cases, since during circular processing not only a large amount of wood is inevitably removed, which is transferred to waste, but also the most durable and precious subcortical layer is destroyed, which reliably protects the core of the log from all kinds of external influences.

Scheme of preparing logs for assembling a log house

First, the upper surface of the log is milled with a profile (“cylinder”) cutter along its entire length (left). Then the log is rotated on supports by 180 °, and with the help of a band saw its upper part is cut along the entire length so that the cut width is 100 mm. After that, a planer with semicircular knives cuts a longitudinal groove on the lower supporting surface of the log.