How to set the dimensions of the board on a band sawmill. Chainsaw rules

Sawing lumber- the fundamental process in wood processing. First, we need to recall a few terms that are used in the woodworking industry and which are defined by GOST 18288-87 sawmill production terms and definitions:

Lumber. Materials that have one or more even sides. Depending on the ratio of length to width and the number of parallel sides, timber, bars, boards, obapol and sleepers are distinguished.

bars- thickness less than 100 mm, width does not exceed twice the thickness. This category also includes slats, only their linear dimensions are much smaller.
bar- thickness more than 100 mm, width does not exceed double the thickness.
Boards- width exceeds two thicknesses, can be cut (all four sides are cut) or unedged (sides are not cut).
Sleepers- this is a beam with strictly defined dimensions, used during the construction of railways, is currently rarely used.
Lagging- the more familiar name "croaker", the outer side of the whip, has only one flat surface. Most often used for further processing into wood chips.

sawing wood methods

This is a very important factor; the overall yield of lumber and their quality largely depend on the chosen method. Depending on the direction of the cut to the annual rings, there are two ways:

Radial. The highest quality lumber has an excellent structure and high rates of physical strength. The saw moves perpendicular to the annual rings.
Tangential. It gives a much higher yield of lumber, but their quality is somewhat lower. The saw moves parallel to the annual rings or in a tangential direction.

The choice of a particular sawing method depends on the end use of the lumber and the condition of the whip. On the Internet you can find "strange articles" about sawing in a circle and so on. In fact, the vast majority of the whips are in the same position during sawing, as a result, part of the lumber has a tangential cut (about 2/3 of the total), and the rest of the lumber has a radial cut. The top and bottom of the log are cut tangentially, only the middle is sawn radially.

At the request of the customer or taking into account our own production, the whip can be sawn from the sides, then turned over by 90 °, sawing is performed again. As a result, a part of the unedged boards with a tangential cut is obtained, and the rest of the boards will be edged with a radial cut. Once again, we repeat that the cutting methods are selected in each case separately, taking into account the above factors. Currently, there are three types of sawmills, each with its own advantages and disadvantages. Let's talk about them in more detail.

Frame sawmills

These are the first mechanisms that began to be used for mechanical sawing of wood. Today, in our opinion, undeservedly "out of fashion." Consider objectively their advantages and disadvantages.

To make it clearer, you need to learn about the principles of work. On a frame sawmill, several saws are fixed in a vertical position (from ten or more, it all depends on the size of the frame), the distance between the saws is set once, sawing is carried out by the vertical movement of all saws with simultaneous feed of the whip.

pros.

You can fully mechanize the whole process
The sawmill is easy to set up and maintain
Performance is at an acceptable level
Saws the entire whip in one pass
All received unedged boards can be cut at the same time and also in one pass
Edged board is of high quality
Time saving

Minuses

It is believed that these sawmills convert a large amount of wood into sawdust. But this is true only for older models. Previously, saws were made from not very high quality steels, the thickness of each saw was up to 3 mm, plus a set of teeth, the cut increased to 5 mm. Today, by reducing the thickness of the saw and the angle of the teeth, the thickness of the cut is significantly reduced. We will compare the thickness of the cut with a band sawmill below, you will find out what their manufacturers are silent about.

Band sawmills

They are considered the most advanced equipment, the most productive, the amount of sawdust is minimal. We will discuss this later, but first we will briefly describe their structure and principle of operation. The cut is made by closed high-speed saws, the thickness of the saws is small, the width of the cut is reduced. Sawing occurs due to the forward / return movement of one saw along the whip. To be honest, we do not notice any special advantages (for the buyer), but there are disadvantages. In order not to be unfounded, we will talk about the intricacies of the cutting process.

Sawmills require a very attentive attitude. Incorrect sharpening of teeth, incorrect tension or choice of cutting speed (all of these parameters are chosen taking into account the type of wood) cause the lumber to get a wavy surface. The height of the waves can reach several centimeters. And such a waviness of even one board negates all the “advantages of a thin cut”. The wave on lumber is a visible defect in processing and reduces the grade of lumber. The classification of wood defects is described in detail in the article of the same name.

These sawmills have a rather low productivity, requiring a lot of physical labor. For example, if your whip has a diameter of 100 cm, then calculate how many back and forth passes you need to make to cut it into boards 2 cm thick, and the frame sawmill will cut it in one pass. In addition, each sawn board must be manually removed from the sawmill and stored in a separate place. In this case, after each cut, you have to set the level of the saw again. Very high degree of danger during operation. The risks of injury while working on such a sawmill increase exponentially - this is a break in the saw at high speeds, and the presence of metal objects in the body of the tree (and this does not happen so rarely). Problems with cleaning sawdust. They are scattered along the entire length of the sawmill, it is long and difficult to remove them.

Of course, manufacturers of band sawmills are “shamefully” silent about such “subtleties”. When choosing a sawmill, we advise you to take into account the maximum number of factors: the required volume of lumber, the availability of qualified personnel, the features of lumber and the requirements for their quality. After all, professional workers at the band sawmill produce lumber of the 1st grade in accordance with GOST.

pros.

Relatively inexpensive
Sawing in both horizontal and vertical direction
Large whip thickness, up to 400 mm
Low waste
Purity saw

Minuses

Poor performance
Increased degree of danger
Complex setup
Highly qualified personnel
Mandatory "rest time" from 8 to 10 hours
Cleaning

Circular sawmills

Circular saws differ from band and frame (multi-saw) sawmills in the quality of the edges and the parallelism of the face. Lumber produced at a sawmill is rightfully considered the best, but only from the point of view of the consumer. The main factor that makes lumber produced at the sawmill unavailable for consumption is the high price. The high price does not allow to compete in the building materials market, despite the excellent quality of boards and beams produced by this method. This circumstance is connected with three facts affecting the increase in the cost of lumber from a sawmill:

Summarize: when choosing edged lumber, it is necessary to take into account not only the method of sawing lumber, but also the qualifications of the personnel servicing this equipment. You can buy good quality lumber from a trusted supplier, having familiarized yourself with the products according to the proposed photos on the manufacturer's website or arriving at the finished product warehouse. The Elka-Palka company is ready to offer its services in accordance with the price lists indicated on our website. We sell only high-quality products of our own production or purchased from trusted suppliers. Mandatory quality control.

Any construction is not complete without the use of wood. If you have logs, then you can saw it into boards yourself. So you can save money, and the log will go into business.

First you need to prepare the log for cutting. To do this, you will need to remove the bark. The simplest and most effective tool for this purpose is considered a scraper. Since the scraper, removing the bark, does not touch the tree.

To remove the bark, you can use a shovel or electric jigsaw. When using a shovel, you need to remove the bark "from yourself".

There are three ways to cut a log. We will not consider one of them, namely, saw cut obliquely. Since this method is used for specialized projects and developments.

Consider two methods that suit us: sawing logs along and across

Cross cutting is used to obtain parts in the form of disks or cylinders.

And the longitudinal method is used to dissolve the log on boards, bars, slats. To do this, many devices are used in production. We will consider how you can saw a log at home, on your own.

For cutting, you can use:

circular
Bulgarian with nozzles

So, we have already removed the bark from the log, so we proceed to the next steps:

We fix the log on the rails or bed
We saw off the slab on one side to get a flat surface
We turn the log over with the flat side on the frame and remove the second slab
Next, we dissolve the log on the boards

How to cut a log into even boards and beams

It is quite difficult to cut wood along the log evenly. After all, the same thickness must be maintained along the entire length. For this, there is special equipment that is attached to a log.

Many, for sawing logs at home, make a sawmill with their own hands

How to make a home sawmill with your own hands

Consider the two most used manufacturing options sawmills.

Option one

We weld a frame from channels and a profile pipe
We attach a saw with an electric or gasoline drive on a carriage with a vertical feed
Attach the ruler to a vertical stand in order for the boarding to be as accurate as possible.
Use a polished pipe or rod as a guide carriage, they are needed so that the carriage moves vertically.
We install a screw in the bearing so that it moves the carriage during movement

With this option, it is the saw that is set in motion, on a specially attached frame, and the log remains in place. A chain saw in this case will quickly cope with the task. If you plan to use a reciprocating saw, then the process will be delayed, since it works in one direction.

Option two

We weld the frame of metal plates and squares
We attach the engine to the bottom of the frame
In the upper part we put a shaft with pulleys
We attach one or more circular saws to the shaft
On the table we fix the guide from the square (metal)
Feed the log by moving it forward and pressing it against the guides.

Boards and timber are one of the main building materials. But not everyone has the financial means to buy ready-made boards. In such situations, one of the ways out is to independently harvest wood on a plot taken from the forestry.

The advantage of a chainsaw as a tool for sawing logs

You can cut a log using a sawmill, a gas or electric saw and additional devices. When choosing one of these tools, the scope of the work ahead should be taken into account. The cost of the cheapest stationary sawmill, together with all components, is 150 thousand rubles. A chainsaw is much cheaper. It is more convenient than an electric saw for the following reasons:

It does not require electricity to operate the tool - this makes it possible to use the chainsaw on the plots.
It is more powerful than the electric saw.
Starts smoothly and allows you to conveniently adjust the speed, which reduces the likelihood of chain breaks.
The operation of the inertial brake is faster than that of an electric saw.
Long working time without interruption - up to one hour.
Can be used in high humidity conditions.

Types of working nozzles

When sawing logs with a chainsaw, various nozzles are used.

Nozzle for longitudinal cutting. It is used for sawing logs along, the process takes place in a horizontal position. After work, the master receives the same thickness of the product. Finished materials are subjected to a drying process, after which the boards are used in construction. In appearance, the device is a small frame, it is attached to the tire on each side.

Drum debarker (rounder). With the help of such a nozzle it is easy to dissolve the log, it works due to the V-belt transmission. It is attached to the belts on both sides, for this purpose special pulleys are used. The speed of rotation of the shaft depends on the size of the pulleys, so the performance of the nozzle is easy to change. This technology forces the master to carefully monitor each stage of the process, some specialists use an assistant during this cut. But this option requires increased security measures.
Sawing with a lightweight nozzle. The method is not very productive, but is used quite often. The element is fastened on one side, but the workpieces are slightly uneven. Such materials are necessary for the construction of sheds or fences.

Features of sawing with a homemade tool

You can easily cut a log into boards with the help of a self-made tool. It's easy to make. To do this, follow these steps:

As a support, you need to use a frame from a school desk or a pipe with a section in the form of a square, its optimal size is 20x20, and more is allowed.
It is necessary to build two clamps, mount a cross member with two holes for the tie bolts at one end, and make a protrusion for the tire in the middle.
For longitudinal sawing of a log into boards, you need to make a support frame, its width should be seven to eight centimeters less than the length.
Then two parts ten centimeters long are welded to both sides, holes are made for the bolts, a handle is attached in the middle for ease of operation.
Then you need to insert the clamps into the grooves, install the tire, carefully fix everything.

It is not difficult to work with a home-made tool, this will require goats, they will serve as a support. In addition, you need to prepare a metal rail or board to use it as a guide. A log is laid from below, the required height for work is set.

The procedure for performing preparatory work

To cut a log lengthwise, you need to perform the following sequence of actions:

Take two straight boards and attach one to the other at a right angle. The result is a strong leading ruler.
To maintain the manufactured ruler, you need to make stops from the boards.
The movement of the trunks must be performed using a tilter.
The log should be placed on a comfortable base.
On the chainsaw tire using nuts, you need to fix the frame.
The supports of the leading ruler must be attached to the ends of the log, checking the horizontal position with a level.
Self-tapping screws must be used to fix all brackets and structural elements. Nails are not suitable for these purposes, since it is difficult to remove them in the future without causing damage to structural details.
The leading ruler must be attached to the supports with brackets and its height adjusted, taking into account that the cut will not go along it, but approximately one centimeter higher.
The log must be rotated and the second board must be fixed in such a way that it rests on the ground and supports the log.

The procedure for performing basic work

Now you need to start the chainsaw and make the first cut.
Next, you need to free the log from the stops and boards and attach the leading ruler on the cut surface of the log in the direction of the next cut. The ruler is fastened directly to the surface or to the ends of the log using supports. The second cut is made perpendicular to the first cut.
The log must be turned and fixed with a board point-blank to the ground.
A guide ruler is not required to perform the following steps. One of the cut sides serves as a guide.
It is necessary to adjust the thickness of the cut on the frame and saw off the log from the other side in such a way that you get a bar with bark remaining on only one side.
This beam must be turned over and fixed in such a way that the fixing point of the fixing board is as low as possible.
Then it is necessary to adjust the frame to the required thickness of the board and saw the timber into boards.

Safety rules when performing work

Do not use the saw blade without the guard.
Wear earmuffs, gloves, goggles, heavy clothing and a respirator.
Do not pour fuel into the hot tank of the tool, you need to wait until it cools down.
Children must not be allowed in the work area.
It is necessary to start the tool on the ground with the chain brake applied, which must be released just before starting to cut.
You should always have a first aid kit on hand.
When working, you need to hold the chainsaw by the handle of the arc, moving it forward along the guide. Do not press hard on the chainsaw - it should move freely.
Right-handers should place the log on their right side, left-handers on their left.

Has your band sawmill been installed and made all the necessary adjustments? So it's time to proceed directly to the sawing process itself. In order to get really high-quality material, it is necessary to correctly install the log and fix it with special clamps.

The quality also depends on the correct calculation of the amount and type of material that you want to get from this log.

Having gained experience in the future, one glance at the log will be enough, and you will already know how much and what kind of material can be obtained from it. Learn to accurately determine where the top is and where the butt of the log is. The butt, as a rule, is larger in diameter than the top. And this largely affects the thickness of the slab.

How to calculate a log

So, you have measured the diameter of the log, and it is measured from the top. We calculate the approximate amount of material according to the diameter and proceed to further actions.

First of all.

We pay attention to all the bends and bulges of the log - a perfectly even trunk is rare. Therefore, we try to turn it so as to get as little waste as possible from it, such as slabs. When the log is laid and fixed, it is worth making sure that it passes freely between the guide rollers.

Set the size on the ruler of the sawmill according to the diameter, and to this size add the greatest height of the bulge of the log. This is that bulge that is higher than the diameter of the top or narrowest part of the log.

Using a regular tape measure, measure the height of the highest part, and from this size you start counting the dimensions of the required material, taking into account the size per cut, which is from 2 to 5 mm.

Secondly.

As soon as the width of the cut reaches the required size, and the remaining height of the log has reached the desired size, it is turned over. That is, if you saw a beam, for example, at 150, then both the width of the cut and the height of the rest of the log should correspond to this value, even be larger, taking into account the removal of the slab.

To do this, after turning the log over, start the calculation from the final size to the full use of the log height, but do not forget to take into account the size of the cut, which, as we already know, is from 2 to 5 mm.

For example - you have a log on the flyover that you cut to a size of 260 mm. Let's flip the log and continue.

The end result we want to achieve is a gun carriage with a thickness of 150 mm. Further, in a simple way, considering that 260 mm-150 mm \u003d 110 mm. We get as much as 110 mm of additional material thickness. And that is exactly what needs to be calculated.

We take this additional size and calculate, in order to obtain a chopping block, which has a size of 50 mm, 110-50=60, do not forget the cut, and in our case it is 2 mm, 60-2=58 mm, then the gap, equal to 25 mm, 58 -25-2=31 mm, slab 20 mm, 31-20-2=9 mm.

As you can see, from our calculations, it turns out 9 mm slab, 20 mm slab, 25 mm cleft and 50 mm chopping block. And the final size will be 150 mm.

Possible mistakes

As you can see, there is nothing complicated here. Often, inexperienced sawmillers make a mistake in the calculations when they start counting from zero. For example, if the final size of the material is 150 mm, then there is no need to add 2 mm to the cut to it, otherwise it will turn out like this 150 + 2 = 152. There should not be such an error, the cut is calculated only between the material, for example, a 50 mm board and 150 mm carriage, we obtain as described above, 150 + 50 + 2 \u003d 202 mm.

If necessary, to obtain edged material, turn the log 90 degrees and perform the same manipulations that are described above.

So you sawed your first log, look at the quality of the material and the accuracy of the dimensions. Make sure your calculations are correct. The main mistake in the calculations is that they forget to take into account the size of the cut. Try to take into account this fact. And don't make those mistakes.

In the future, when you gain experience, the calculation will take place automatically in your head, it will be enough to look at the log.

We are confident that everything will work out for you, we wish you success in your work.

Many masters have developed their own methods of wood processing, many years of experience with machines and makes it possible to significantly reduce the process. To get high-quality material, sawing on a band sawmill is necessary, taking into account all factors, observing the rules for operating the device.

Calculation features

The log is installed in the guide rollers with its fixation in the clamps. The amount of material obtained is calculated based on the diameter of the log. The correct calculation of the type and quantity of material also affects its quality.

An experienced sawmiller, having looked at the log, is already able to determine all the parameters of the future material, immediately find the butt and top of the log. The diameter of the butt is larger than the top. The thickness of the slab will depend on the accuracy of the calculation.

The diameter of the log must be measured from the top. Further actions of the wizard:

There are practically no perfectly straight trunks. Therefore, it is necessary to carefully examine all the bends, bulges.
Rotate the log so that the minimum amount of waste in the form of a slab is obtained.
When installing a log, make sure that it moves freely in the guides.
On the ruler of the sawmill, set the dimension according to the diameter of the log plus the maximum height of the bulge.
The size of the bulge is determined from the difference in the diameter of the butt and top.
The tape measure measures the size of the highest part, from the result obtained, the countdown of the dimensions of the material begins.
The master must take into account the size of the cut 2-5 mm.

log turning

When the remaining height of the log approaches the desired size, it is turned over. If you need to get a beam with a thickness of 150 mm, the sawn width and the remaining height of the log should be slightly larger than this size, taking into account the slab.

When the log is turned over, the remaining height after the cut is made is measured, and the material is calculated before using this dimension completely.

Calculation example:

The rest of the log height after cutting is 270 mm. The goal is to get a beam with a thickness of 150 mm: 270–150 \u003d 120 mm.
From 120 mm it is necessary to obtain a block of 50 mm: 120–60–3=57 mm. The value of 3 mm is given for propyl.
Tesina 25 mm: 67–25–3 = 40 mm.
Podgorbyl 25 mm: 40–25–3=12 mm.
Slab 12 mm.

Further obtaining of lumber is achieved by turning the log at an angle of 90 degrees and similar calculations. One of the common mistakes is not taking into account the allowance for cut or adding more times. The master needs to be careful.

Sawing technology

Sawing technology is selected taking into account the type of wood, the size of the log, the design features of the sawmill.

Quality of raw material

The cutting efficiency depends on the quality of the raw material. First you need to evaluate the wood, sort the logs. Sorting is carried out according to the appearance of the log. Main signs:

curvature;
the volume of the false nucleus;
number of knots;
diameter.

The log is divided into 4 equal sides. A facet that does not have knots, cracks, rot, scars, chips, or damage from insects is considered clean. This results in the highest quality lumber.

Logs intended for sawing must be stored in accordance with the requirements. The sooner after cutting the tree the log gets into sawing, the easier it is to work with it. In dried raw materials, the saw can give a wave, and the thickness of the boards will change. The most valuable wood is outside the log, quality drops towards the center.

sawing methods

In the process of sawing, it is necessary to take into account the thickness of the board, the compensation of the taper, the flip of the log. Craftsmen can cut on a band sawmill in three ways.

Simple sawing

The log is subject to sawing to the end with the receipt of unedged boards, but the coup is not performed. The method is simple and fast, but has disadvantages. The resulting boards must then be cut from the sides.

Lumber comes out of poor quality with a lot of waste. The central boards crack easily, the method is suitable for working with low-grade wood.

circular sawing

Having made a cut, the sawyer turns the log over to another side, and so on in a circle to the remaining central part. For medium and higher grades of wood raw materials, the method is the best, but it is difficult to turn the log over at individual sawmills. Suitable for sawmills with hydraulics.

Sawing timber

The beginning of the cut is made in a circle, and the central part is left in the form of a certain size of the beam. Sawing timber ensures maximum productivity of the sawmill, the method is used for sawing medium and low grade logs.

First cut

It is important to choose the edge of the sawn wood to start processing. When sawing timber and circular processing, craftsmen use 2 methods.

The worst side is to be cut first, the taper of the log is not taken into account. Taking into account such a feature means tilting, raising the log so that the saw runs parallel to the bark. Short boards and a large amount of slabs will come out of this part.

Since the taper is not taken into account, from the best edge of the log, the sawing will go parallel to the bark without tilting and lifting, this approach will allow you to get the maximum of long boards of good quality.

Start by sawing the best side of the log, but take into account the taper. That is, set the log so that the saw is directed parallel to the bark.

The result will be the same, but in the second method it is easier for the sawmiller to choose the best edge, since it is visible. In the first method, the best part is hidden and inaccuracies are possible when installing the log. If the wood being cut is of high quality, both methods work in the same way. With raw materials of lower quality, it is better to use the second method.

log flip

If the turn is made by 180 degrees, unedged boards are obtained, requiring additional processing from the sides, and then the half-beam is sawn into an edged board.

With a turn of 90 degrees, unedged and semi-edged boards are obtained with the need to trim from one side. The 180° flip sawing method will produce more valuable wide boards. But if the edge trimming machine is equipped with only one saw, 90 degree flipping is convenient.

After sawing opposite edges, the worst of the remaining faces is cut first, but this option does not take into account the taper. But the high quality edge must be sawn parallel to the bark, which increases the yield of quality lumber.

Common mistakes and fixes

Masters are aware of a number of situations that adversely affect the material processing process.

When entering the material, the saw jumps up, but after that it works normally, at the end the power drops. The reason is often a large sharpening angle of the teeth, it must be reduced by 5 degrees.

Entering the wood, the saw rises, then the craftsmen get a curved board. The reason is that the sharpening angle exceeds the norm, and the wiring is insufficient. It is necessary to increase the sharpening angle by 4-6 degrees, and slightly increase the divorce.

After the dives, the saw goes smoothly, the sawmill gives several reasons: blunting of the cutting blade, a small sharpening angle. If the shape of the tooth corresponds to the standard, it is necessary to increase the sharpening angle.

The saw comes with constant dives. Small sharpening angle with insufficient wiring.

There is a large amount of sawdust on the surface of the boards, the setting of the teeth is increased.

Sawdust hot and pressed - underestimated divorce.

The cut is obtained in the form of a wave. If the saw is quite sharp, then the wiring is insufficient. Too little setting sometimes leads to saw blade breakage.

The fabric is cracking at its trailing edge. The rear stops of the rollers, in which the log lies, are far from the trailing edge. It is necessary to set the distance less than 0.3 mm.

Rolling sawdust on the saw blade. Small set of teeth, you need to increase the set.

Rolling sawdust on the inner surface of the tooth, they are not on the canvas. Poor tooth sharpening (high feed rate, excessive metal removal). Additional reasons - the sharpening angle is large, the saw was used after the blade was blunted.

After sharpening at the cavity of the tooth, the blade cracks. The geometry of the tooth is broken or the stone for sharpening is carelessly refueled.

Setting up a sawmill

Choice of coolant

Sawing on a band saw with water for lubrication is not correct. It is better not to use lubricant until the sawdust “runs” on the saw. If this happens, the optimal treatment is: 1/2 chainsaw tire lubricating oil, 1/2 diesel oil. The mixture is applied on both sides of the saw blade, but the amount of cooling solution is small.

Such a lubricant will extend the life of the sawmill pulleys and reduce the number of boards with traces of flowering.

Releasing tension

The cloth in the process of sawing is heated, which is why it stretches in length. After cooling, the desire for compression begins. At this point, overload occurs due to excess tension, cracks may appear.

The blade remembers the shape of the pulleys, deformation of the pulley belts occurs, which can lead to vibration of the blade. The hump on the belts is jammed, which ensures self-centering of the saw. When you stop sawing, the tension on the saw must be removed.

Band saw wiring

The optimal wiring is considered when between the saw blade and the sawn wood is a mixture of 2/3 sawdust and 1/3 air. If 80% sawdust is thrown out, the saw is set correctly.

In the presence of a lot of loose sawdust on the cut, and scratches on the surface of the board, the saw spread is more than necessary. The saw at the same time functions jerkily. With insufficient divorce, hot sawdust, tightly pressed, will remain on the surface of the boards during the sawing process, this situation has a detrimental effect on the saw. And after cutting the wood, waves will remain on the material.

Before sawing, the logs are sorted by diameter:

For a larger diameter, the divorce increases, but it is performed only on 1/3 of the tooth from above.
For soft wood, the divorce should be increased, sharpening should be done after preparing the equipment with the obligatory observance of the shape of the tooth.

The indicator of the divorce device works in a busy mode and often goes astray, therefore it is necessary to constantly check it.

Sawing speed

Increasing the sawing speed will result in a cleaner cut, but the life of the saw will be shortened. If the cut quality drops, the feed rate must be reduced. For the initial 5 minutes, the equipment operation indicator should not be more than 1/2 of the maximum value.

Preparation for work

During operation, the sawmill requires adjustment, verification of all its important components. The most significant part of the device is band saws.

Before starting work, you must:

Check whether parts and screw connections are securely fastened.
Lubricate rubbing surfaces.
Check the reliability of grounding.
Turn on the electric motor at idle, check how the belt moves.
Check the installation of the band saw, adjusting if necessary.
To reduce the saw blade deflection, move the left roller 5–10 cm from the side edges of the tree.
Raise the band saw above the log and check its reversal.
Check the fastening of the protective covers of the saw, gear, wedge-repair gear.