Professional sewing equipment known as 23rd classIt is a unique engineering solution designed to perform specific crosslinking operations. Unlike household models, this unit is designed to work with thick materials, leather, tarpaulin and multi-layer products. The reliability of such mechanisms has been tested by decades of intensive operation in industrial workshops.
The basis of the functionality is double-strandedIt provides a strong and elastic seam that does not dissolve when stretching the fabric. The design of the machine allows you to penetrate particularly dense areas without stitches, which is critically important in the manufacture of workwear, shoes and accessories. Understanding the principles of operation of this node is necessary for each operator.
In this material, we will discuss in detail the technical nuances, maintenance rules and methods for eliminating common faults characteristic of the equipment of this series. Competent setting thread-tension And the correct selection of needles allows you to achieve perfect stitch quality even on complex materials.
Design features and principle of work
The Class 23 machine is based on a robust design with a vertical swinging shuttle, which distinguishes it from machines with a horizontal or rotational type. Such a mechanism of movement of the shuttle creates minimal friction and allows you to develop a high sewing speed without overheating the nodes. swaying shuttle ensures stable capture of the upper thread even when working with the puffy tissues.
The most important element of the kinematic scheme is feed-in, which in this model often has a rack or geared design with the ability to adjust the height of the lift. This allows the operator to control the progress of the product under the foot, preventing the displacement of the layers. The accuracy of the interaction of the needle and shuttle is regulated by a gap, which should not exceed the permissible norms.
The technical secret of a swinging shuttle
Unlike the rotary counterparts, the swinging shuttle in Class 23 machines has less inertia, which reduces noise and vibration, but requires more accurate synchronization with the needle in time of hamstring.
The process is used to manage the reverserThis allows you to make fasteners at the beginning and end of the line without turning the product. All moving parts are lubricated either manually through oils or through a centralized lubrication system, depending on the year of manufacture modification. Regular monitoring of the oil level in the crankcase prevents premature wear of rubbing pairs.
Technical specifications and scope
Class 23 equipment is primarily designed for heavy-duty, such as natural and artificial leather, high-density denim fabric, tarp and technical fabrics. The maximum thickness of the punched package can reach 10-12 mm depending on the modification and the installed needle. This makes the machine indispensable in the shoe industry and in the sewing of working clothes.
The rotation frequency of the main shaft is usually from 2000 to 3000 revolutions per minute, which ensures high productivity. Length of stitch It is regulated in a wide range, allowing you to perform both small fasteners and long connecting seams. The power of the electric motor is selected with a margin to overcome the resistance of dense materials.
- 🧵 Line type: Two-stranded shuttle, full-length (depending on the configuration).
- 📏 Maximum length of stitch: up to 9-12 mm.
- ⚙️ Leg height: Up to 16 mm (standard) or up to 25 mm (special version).
- 🔌 Drive type: direct drive or belt transmission from a friction wheel.
It is important to note that the car is doing a great job with multilayerwhere thickenings need to be broken (for example, seams on jeans or joints in bags). The design of the needle driver is strengthened, which eliminates its deformation when working with dull or thick needles. However, the use of inappropriate consumables can disrupt the balancing of the mechanism.
Preparation of the machine for work and refueling
Before the start of operation, it is necessary to conduct a visual inspection of the machine of class 23 for the absence of external damage and check the presence of lubrication. Filling of the thread is carried out strictly according to the route indicated on the scheme, usually located on the body of the machine. Violation of the thread path leads to change tension and the formation of loops.
Insert the spools into the shuttle so that the thread exits counterclockwise (for standard configuration). Stretching the thread through the shuttle's tension spring until a characteristic click. The top thread is refueled through the nitrogen rulers, tension regulator and needle. needle shall be fitted flat to the side indicated by the manufacturer (usually to the right or back).
☑️ Checklist for sewing preparation
After refueling, be sure to perform a test run on an unnecessary scrap of material. This will allow you to assess the quality of the stitch and, if necessary, twist the screws of the regulators. If the machine has not been used for a long time, it is recommended to make several turns of the flywheel manually to distribute the lubricant to the nodes. A sharp start without preparation can lead to jamming of the mechanism.
⚠️ Attention: Never start a car without a pre-installed needle and a tucked-in "idle" thread at high speeds, as this can lead to a needle holder hitting the needle plate and breaking the shuttle nose.
Adjustment of thread tension and stitch quality
The quality of the seam on a class 23 machine depends on the correct balancing of the tension of the upper and lower threads. The ideal stitch is obtained when the node of the connection of threads is strictly in the middle of the thickness of the material. If the nodule is visible from above, then it is slightly stretched. top-strand Or the bottom is too tight.
Adjustment is carried out by means of a nut on the rod of the needle driver (for the upper thread) and a screw on the spring of the shuttle (for the lower one). The rotation of the screw clockwise increases tension, against - reduces. To work with elastic tissues, tension often has to be weakenSo that the seam does not wrinkle after stitching.
| Seam defect | Probable cause | Elimination method |
|---|---|---|
| Loops on top | Weak tension of the upper thread | Twisting the nut of the upper thread regulator |
| Loops from below. | Weak tension of the lower thread | Pull the screw up the shuttle |
| Skip stitches | Wrong needle or blunt point set | Replace the needle, check the gap with the shuttle |
| Thread break | Excessive tension or burrs | Reduce tension, check the path of the thread |
When switching to another type of material, always conduct a test deferral. Thickness of the thread It also plays a role: the use of too thin thread in thick fabric can lead to its rubbing, and too thick - to rupture of the fibers of the material. An experimental approach to setting parameters is key to success.
Use threads of the same composition and thickness for the top and bottom line when working with decorative seams - this will ensure uniform tightening and the same brilliance of the seam on both sides.
Typical malfunctions and methods of their elimination
In the process of operation of the machine of class 23, various problems may occur, most of which are eliminated without a call from the master. A common problem is needle-breakThis usually occurs when a material is jerked or a curved needle is used. After replacing the needle, be sure to check if the shuttle's nose is damaged during the impact.
If the machine began to make a knock or increased noise, you need to stop work and check the lubrication system and fasteners. Weakened screws attaching the needle driver or rod can lead to serious breakdown crank-and-shifter. Also, noise can be made by a polluted shuttle, which needs to be cleaned of pile and old lubricant.
- 🔧 Failure of the mechanism: often caused by thickened oil or dust; complete cleaning and washing of the nodes is required.
- 🧵 Tangle of thread: It occurs when improper filling or using low quality threads with a large pile.
- 🦶 Uneven feeding: wear of the teeth of the reiki or weakening of the clamping leg.
⚠️ Attention: If after replacing the needle and refilling the thread, the problem with the stitches is still missing, in no case increase the sewing speed - this will lead to breakage of the shuttle nose. Requires a fine mechanical adjustment of the gap.
Maintenance and lubrication rules
The durability of the 23rd class machine depends on the regularity of maintenance. Every day after work, it is necessary to clean the working units from dust and fabric scuffs with a special brush. Shuttle move should be removed and wiped with soft rags, removing accumulated down, which is mixed with oil and forms an abrasive gruel.
Lubrication should be produced only with a special oil for sewing machines that do not have odor and impurities. The use of car oils or solidol is strictly prohibited, as they thicken in the air and clog the thin channels of the lubrication system. Olives It should always be at the operator’s fingertips.
Schedule of lubrication of the main nodes:1. Shuttle passage - before each shift (2-3 drops).
2. Needle plate - 1 drop in the hinge of the foot.
3. Carter Main Shaft - Check the level once a week.
4. Rattle is lubricated through available holes once a month.
Every six months, it is recommended to carry out complete prevention with disassembly of the main components to remove the old lubricant and check the wear of parts. Pay special attention to the state bearing and bushing. Timely replacement of worn-out elements is cheaper than repairing the entire mechanism in the case of jamming.
Regular cleaning of the shuttle from the pile and drip lubrication before each shift increase the life of the machine 23 class 2-3 times, preventing 90% of mechanical breakdowns.
Advice of professionals on working with equipment
Experienced seamstresses know that the Class 23 car likes confident but smooth handling. You should not make excessive efforts when promoting the material, relying on the power of the feeding mechanism. Synchronization The hands of the operator and the movement of the machine are the key to a smooth and beautiful line. When sewing corners or complex areas, the speed should be reduced.
Use only quality needles of proven brands, corresponding to the type of material. Cheap needles can have microscopic surface defects that result in filament rupture or tissue damage. Needle number The rule states that the diameter of the ear of the needle should be 15-20% larger than the diameter of the thread.
How to keep the car in a simple way?
If the machine 23 class is not used for a long time, it must be thoroughly cleaned of dust, cover the metal parts with a thin layer of oil for preservation and cover with a cover. Store equipment should be in a dry room, excluding direct sunlight and moisture to prevent corrosion and drying of the osteoils.
Can I sew fine fabrics on a 23rd class car?
Yes, it is possible, but it requires reconfiguration. It is necessary to reduce the pressure of the foot, install a thinner needle (for example, No. 90 or No. 100) and use thin threads. You may also need a paper lining under the seam to prevent the reiki teeth from damaging the delicate fabric structure.
Why does the machine miss stitches on thickenings?
Most often this is due to the fact that the needle does not have time to form a loop for capture by the shuttle due to the displacement of the tissue. Solution: slow down the flywheel rotation speed at the time of thickening puncture, use a needle with an increased point (such as an LR or LL type) and make sure that the gap between the needle and the shuttle is minimal (0.05-0.1 mm).
What is the maximum size of the needle that can be used?
For standard models of the 23rd class, it is usually recommended to use needles up to the size No. 150 (according to the European classification). The use of thicker needles is possible only in specialized modifications with an increased gap in the needle driver, otherwise the risk of breakage of the needle driver or deformation of the needle is high.
Should I change the oil in the crankcase and how often?
Yes, the oil in the crankcase (if the model has an oil bath) must be changed periodically, about once a year during intensive operation or once every 2-3 years with moderate use. Old oil contains metal shavings and wear products that work like an abrasive, accelerating the destruction of gears and bearings.