After acquiring an overlock, I immediately want to get to work. But do not rush! In order for the work to turn out to be of high quality, it is necessary to carefully set up such a delicate device. Set up the sewing machine in stages.
How to properly configure overlock before sewing
Compared to a sewing machine, an overlock device is very difficult. The setting of many criteria of the device nodes, the repair work of the mechanisms are subject only to an experienced specialist. A number of works (for example, the interaction of loopers) on their own to carry out is very problematic. But often no repair or adjustment work is required, you just need to perform the correct tincture of the thread tension by the isod, which will ensure high-quality operation of the machine.
Thread tension
Previously, setting up an overlock was difficult, as all actions were regulated by conical springs closed under the machine body. Today, the availability of the necessary controls on the external panel makes it easier to set balanced values.
Professionals advise adjusting the tension using whole indicators on the regulator. The divisions between them are necessary in order to adjust the stitch for a particular type of work.
In order for the thread tension (three-thread overlock) to be optimal, it is necessary to achieve the correct position of the controller on the body of the sewing machine.
Exposed values from 2 to 4 will lead to low tension, values from 4 to 5 to average tension, a mark from 6 to 7 will provide strong tension.
Important! All regulators should be located at the same mark, and all threads tucked into them of the same number and structure.
Stitch and Cut Size
To make a seam of high quality, it is advisable to determine the width and length of the stitch. The presence of a universal mode provides standard overlock work on most fabrics. To make small seams, the machine is optional to configure.
It is required to apply the highest indicators in cases when a larger volume of fabric needs to be accommodated inside the stitch. At minimum values, it is quite difficult to work: due to the optimal tension, it periodically breaks off.
How to get a quality line
To achieve optimal settings, you will need a little knitwear to check the quality of the stitch. Stitch the material and carefully examine the resulting seam.
First, inspect the stitches of the left needle. The presence of wrinkled tissue indicates a strong tension of the left needle thread. It is necessary to weaken it, gradually changing the performance of the regulator. Check each change with a line until the wrinkles on the fabric completely disappear.
At the next stage of the instrument setup, it is necessary to check the evenness of the stitch: position the fabric so that the stitch is in the middle, stretch the ends to the sides - a ladder of threads requires an increase in tension.
Important! It is necessary to focus on the left thread of the needle, since it is responsible for connecting the loop with each other.
If it is properly stretched, the line will be of high quality. Having found the correct indicator of the left thread, you need to duplicate it on the right thread. This principle is acceptable for all types of matter, the values for the right and left should be the same.
The last step is to determine where the looper threads are intertwined (the last piece of fabric). The stitch should be even with a smooth pattern between the stitches. The presence of a loop around the edge of the material indicates that the looper threads are loose, it is necessary to pull them and double-check on another piece of fabric. If the loops of only one looper protrude, it is necessary to tighten its thread. In some cases, it is necessary to immediately tighten one and loosen the other looper (it is better to begin to loosen, then tighten).
Resolving Common Issues
If the material does not move when overcasting, then the foot presses the fabric very weakly. When working with too thin a material, it is necessary that the pressure of the foot is minimal or the fabric will wrinkle.
- When overcasting thick material, the presser foot pressure must be increased.
- A cliff indicates improper refueling. Loopers should be threaded with particular care. In certain types of machines, you can only refuel with curved tweezers - the process is quite complicated.
- Using the scheme will allow you to correctly insert the thread at the required places, skipping one fastener will lead to uneven seam.
- A break can be the result of an improperly selected thread. The threads used are also important for working on an overlock; they are indicators of overcast seams. Different quality and thickness will affect the change in the pattern of the seam. It is better not to use thick or cotton threads. Thin and elastic will easily pass through the fabric being processed, into the needle, loopers. The same threads are recommended for use on conical bobbins.
- Entanglement is possible due to improperly wound thread on the spool. It is necessary to check the direction of the thread.
Skipped stitches may result from:
- the needle is bent or not sharp. A dull needle is determined by holding the thumbnail along the tip of the needle around the circumference. If the needle is bent, the nail will feel it. The same can be done with a magnifier. If a defect is detected, do not straighten the needle - this is unacceptable for fine tuning the overlock.
It is important to study which needle is in the machine and use only those categories and brands that are recommended by the manufacturer.
the needle is not installed correctly; - the needle cannot be used according to the recommendations of the manufacturer, wrong;
- weak pressure of the foot;
- skipping one of the thread mounts.
Overlock lubrication and cleaning
Long-term use of the machine leads to the need to clean the compartments of the loopers and other accessible places for the accumulation of contaminants (cuttings, tows, oil stains). You can lubricate and clean the overlock with your own hands. Today there are a large number of videos that show how to carry out these procedures. Regardless of whether Chinese, company or industrial, an overlock is used.
For cleaning, it is better to use a hard hair brush. Excessive oil at the needle must be avoided as this may damage the material. Accuracy is necessary to lubricate components in contact with the material.
Lubrication should be carried out once every six months, with frequent use once every 30 days. The oiler can (better) be replaced with a medical syringe, it will provide access to difficult places with low oil consumption.
In the diagram you can find instructions for lubrication, but it is better to lubricate all available places.
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