What is Jointing and Thickening?

Today we will look at one of the types of processing of wooden products - wood jointing . If you are going to build a house yourself, especially a frame house, then you will definitely need this.

Wood planing is a wood processing method that involves planing the plane of wood after sawing. The tool used for jointing is a jointer or plane (I will explain how they differ from each other a little later). The peculiarity of its work is to level the surface of the wooden workpiece, after which the working surface becomes smooth, even and without defects. Depending on the stages of jointing, different types of planes and jointers are used.

What can replace a surface planer?

Re: Thicknesser with what to replace

?
Of course, a router is more important than a thickness
, but for thicknessing with a planer you need to use a bunch of devices, and still the speed of processing the material will be incomparable with
a thickness planer
. Although it will be suitable for thicknessing small boards.

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Thickening and jointing operations. What is the difference?

Beginning carpentry masters often ask the question “What is the difference between thickness planing and jointing?” In fact, a person who has not seen these operations live is often confused and does not see the difference - after all, the apparent output effect from these operations is the same: a smooth surface of the workpiece.

However, in fact, there is a significant difference between these operations, despite the fact that they can both be called planing.

On a jointing machine, the plane is planed in a straight line. The processing unit of the machine is a round knife shaft with several knives, which is fixed in such a way that when wood is moved along the horizontal surface of the work table, planing is carried out along the bottom of the workpiece. When using a side stop, you can set the desired angle between the bottom and side surfaces. This operation also allows you to remove the chamfer.

The thickness planer also has a knife shaft and is designed for flat planing of wood. But unlike a jointing machine, the shaft is located on top and planing occurs on the upper side of the workpiece, while its lower part rests on the surface of the work table. Consequently, on a thickness planer it is possible to calibrate the workpiece to the size according to thickness.

TIPS FOR CARRYING OUT THE JOINTING OPERATION

- to reduce the amount of waste, it is necessary to cut the boards to the required sizes before jointing, leaving an allowance for processing - this way the workpieces will be processed in fewer passes, since shorter and narrower boards will have less deflection;
— in order to obtain a smoother and more even surface, it is not recommended to remove a layer of more than 0.8 mm from the workpiece in one pass. You should also take into account the feed speed - the lower it is, the smoother the surface;
- if the board has a winged feel, then when jointing you need to press its opposite corners to the table. After several passes on the machine, the corners will be aligned and will be able to ensure stability of the entire surface during further processing of the remaining part;
— when jointing, for better planing, it is recommended to use a clamping device.

TIPS WHEN PERFORMING THE THISING OPERATION

— during thicknessing, chips and other debris that fall between the workpiece and the feed drums or table can leave imprints on the surface of the workpiece. Therefore, it is recommended to use a chip cleaner - it will remove the waste produced by the machine;
— the workpiece should be fed at a slight angle — this promotes more uniform wear of the knives and reduces breakouts;
- if the thickness of the material is small, for example, 6 mm, then it can be attached with double-sided tape to an improvised sled. But do not process workpieces that are too thin (thickness less than 3 mm) - the knives of the machine can split them and throw debris at you;
- if you need to get several workpieces of the same width at once without traces from the saw blade, then they need to be folded face to face, pointing the edges already smoothed by jointing downwards, and then pass everything through a thickness planer.

produces universal woodworking machines that perform the functions of both jointing and thicknessing. These include the SDMR-2500 and SDR-2200 machines. In addition, thicknessing attachments TD-2000 / TD-2200 / TD-2500 will allow you to perform thicknessing when installed on BELMASH machines of the SDM series (according to the models): SDM-2000M, SDM-2200M and SDM-2500M.

What is a thickness planer

First of all, it’s worth understanding what a jointer and surface planer are.

A thickness planer is a machine designed for processing wood. It is a type of planing machine and is used to produce boards of a certain thickness. The machines are used in home workshops and in industry. With their help, wooden blanks of a strictly specified thickness are obtained, as well as an even and smooth surface.

It is worth noting that a thicknesser is also called a measuring device, thanks to which boards are measured before cutting.

The work process is simple: the board is fed manually or using rollers along the work table. It passes under the knife shaft, which removes part of the wood and at the same time presses it. If the thicknesser is double-sided, then there are two knife shafts on it - on the top and bottom, on the table. This allows the material to be processed faster.

There are also multi-sided thicknessing machines. They process three or more sides of the workpiece simultaneously. Such devices are characterized by increased productivity, high price and significant size. They require careful care and regular repairs.

Source obzor-expert.com

Before choosing a thicknesser or jointer, it is worth learning more about them. Thicknessers are divided into:

Mobile. These are small, lightweight machines that are easy to move. They are easy to use and are often used in the home.
Stationary. This is a large piece of equipment with a lot of weight and high performance. Such machines are capable of producing large boards with a large number of edges. They are usually used in production.

Mobile machines are usually purchased for a home workshop. They are small, inexpensive, but do the job well.

Sharpening jointer knives

Do not forget that knives should be sharpened periodically. Even when using high-quality steel, there is a possibility of damage to the cutting edge. The features of the process include the following:

Requires special equipment.
You need to maintain a certain angle.
Even minor defects can cause a serious reduction in efficiency.

You can sharpen the jointer knives yourself, but this requires certain equipment.

How are repairs carried out on a ship?

Maintenance is what keeps any mechanical equipment or machinery running. Whether it's a small machine or a large structure, effective maintenance can help with longevity and a favorable outcome. On a ship, maintenance is what keeps the equipment up to date and running smoothly. In this article, we will learn how maintenance is carried out on a ship.

In the ship's engine room, where the maximum number of machines are located, engineers and crew carry out maintenance for safe and efficient operation. Every machine on board a ship requires maintenance, which must be performed at regular intervals.

In the old days, the number of crew and engineers on a ship was large, so maintenance was quick and easy. However, in the present scenario, the number of crew members and engineers on the ship has been drastically reduced.

Many ships only have 3-4 engineers on board, and even the time required to maintain the ship has been reduced. Maintenance requires manpower and time, which may not be available at all times since the number of crew members is less and the amount of equipment is more.

For this reason, it is important to plan equipment maintenance in advance so that it can be properly repaired and maintained. Typically, the second engineer must plan the ship's maintenance schedule.

Effective planning and adequate use of equipment are the keys to productive maintenance. In this article, we will look at the main types of maintenance procedures performed on a ship.

Types of Maintenance Procedures

1) Preventive or planned maintenance system

It is known as PMS or Planned Maintenance System. In this type of system, maintenance is performed according to the operating hours such as 4000 hours, 8000 hours, etc., or at calendar intervals such as 6 months, a year, etc. of the equipment. Maintenance is carried out regardless of the condition of the equipment . Parts must be replaced if scheduled, even if they can be used.

2) Maintenance or Troubleshooting

In this system, maintenance is carried out when equipment breaks down. This is the reason why it is known as hardware repair. This is not an appropriate or good method as situations may arise where the equipment is required in an emergency. The only advantage of this system is that the operation of the machine parts is used for its entire service life or until it breaks down. This system can be costly as some other parts may also be damaged when it breaks down.

3) Condition Maintenance system

In this system, equipment parts are checked regularly. Using sensors, etc., the condition of the equipment is checked regularly and appropriate maintenance is carried out. This system requires experience and knowledge, as misinterpretation can damage the equipment and lead to costly repairs that may be unacceptable to the company.

Tags: general recommendations Image Credits Planned maintenance Ship maintenance system

.Power supply: installation location and case selection - How to properly plan and select parts for an air-cooled PC, part 1 Power supply

: installation location and housing selection

Block based power supply

Many modern PC cases place the power supply under the motherboard. This installation option has many benefits, so we highly recommend a chassis configured this way. As you can see from the diagram, the fan draws cool air from floor level through the power supply's own intake, uses it to cool the active components inside the power supply, and forces it out the back of the device.

Advantages for bottom mounting :

• Continuously blows cool air from the floor to the outside of the case • Directly pushes out of the case • Lower fan speed • Cooler operation allows for more efficient power supply • Less thermal stress on components, longer life • Lower center of gravity • No overhead power cable

Flaws:

• The chassis must have a bottom opening • It must also have an air filter • Possible impact on acoustics depending on the floor material.

Despite the minor drawbacks, the above configuration is preferable to some of the other setup options that follow, and you should always look for a case that fits it. But this is also where you can go wrong:

Do not install the power supply with its opening facing up in the chassis. You should only go this route with passively cooled "quiet" power supplies to allow warm air to rise. Otherwise, you are fighting the forces of convection and possibly creating a situation where a screw or other loose part can become caught in the power supply.

Power supply at the top of the unit

Older PC cases built to the ATX specification place the power supply under the top of the case. Air is drawn in from inside the case and then expelled. This supposedly improves dissipation and prevents heat buildup. However, this also causes the power supply to absorb most of the heat generated by the graphics cards and processor. Consequently, you get inefficient operation from the power supply, making maximum power and efficiency nearly impossible to achieve at temperatures exceeding 40°C (as these are typically based on an operating environment of around 25°C.) The durability of the components inside the power supply will suffer too.

Advantages for top mounting:

• Helps with cooling in some systems • Shorter cable required for 12V connection

Flaws:

• Higher PSU temperature • Inefficient and loud operation • System ages faster

The perfect chassis...

… does not exist. However, large, well-designed towers like the Corsair Graphite 600T come very close. There is nothing that can restrict the airflow within the structure. Space, cable routing at the rear, and multiple fans and air filters combine to create a solution that fits what we consider ideal.

As much as possible, you should stick to cases that don't restrict airflow from bottom to top. If you want to include a particularly long graphics card in your configuration, use a chassis that is as deep as possible. Otherwise the card will split the air flow. Thick cables should always be at the back. Additionally, anything that rattles around will significantly disrupt the air flow.

Planer or planer

A fairly common question is what is the difference between a planer and a jointer. Both options allow material to be removed from the surface. The difference is this:

The plane is intended for primary work. As a rule, the layer of material for which the equipment is configured is removed from the surface. Planing is carried out to remove knots and bumps. The design is represented by a combination of a knife and a block; in some cases, two cutting elements are installed.
The jointer is considered a type of the first tool; it is a long version of the body, due to which the device is pressed with great force onto the surface being processed. In this case, 2 blades are also installed, which provide a finishing jointer.

Both options are found in the standard kit of a professional who processes wood.

Electric

Today, a stationary jointer can be manufactured in an electric version. Professional devices are characterized by the following features:

Quite a large mass and clamping force.
During operation, high precision can be achieved.
Increased labor productivity.
Often the design provides the ability to quickly change knives.

Read also: Making a screw with your own hands video
An electric jointer is used in industry and everyday life, the product is characterized by high performance characteristics. The only drawback in most cases is the high cost, as well as significant energy consumption.

What is a jointer

A jointer is a carpentry tool that is used to level the surface of a wooden piece. As the name suggests, a jointer is used for jointing or creating a base. The result is perfectly flat edges, without grooves, depressions or screws.

The design of a jointer differs from that of a planer. The knife shaft is mounted on the machine bed. The back of the table should be level with the cutting shaft. The table itself consists of a fixed back part and a liftable front part, which is adjusted according to the thickness of the material that is planned to be removed at a time. The workpiece is pulled along the front table through a knife shaft, which removes the layer. You need to carry the board several times to get a completely smooth surface.

Source stankicentr.ru

When analyzing the difference between a thicknesser and a jointer, it is worth noting the functions of the second. The jointer is used:

For leveling large parts of boards;
For rough leveling;
For removing edges;
For selecting grooves at angles.

There are several types of machines. They are single-sided and double-sided (you can process two planes at a time), manual and electric, and also differ in power, size, speed, etc.

Electric hand tool

For simple operations on processing short boards, hand tools with an electric drive are used. To trim the surface, a lot of force is required, so an electric motor was added and the design was slightly improved. Because of this innovation, its performance characteristics have improved:

the mass has become larger, the pressing force has increased;
processing has become more accurate;
work has accelerated;
Replacement nozzles have appeared in the kit sold.