If you bought a new sewing machine, and it does not work as you would like, this is not a reason to carry it for repairs or return it to the store. She may just be out of tune. This means that we need to set up the machine before starting work.
Instructions
Step 1
The spring that squeezes the thread should be twisted so that the cap, tucked in by the bobbin and in the state raised by the extended end of our thread, does not allow the thread to unwind until we pull it up sharply.
Step 2
We pass the upper thread through the feeding system. Typically, this process looks like this: the thread passes through several metal eyes, then passes through the tension regulator, then it passes into the eye of the thread take-up lever and through several staples it enters the eye of the needle.
Step 3
We figured out how to skip the thread. Now let's move on to adjusting its tension. We will get the most beautiful and high-quality stitching if the lower and upper threads are intertwined in the depth of the material invisibly to the eye. This will happen if the thread tension is correct. We can adjust the tension of the upper thread by the mechanism on the front of the machine, and the lower thread by the adjusting screw located on the hook.
Step 4
Adjusting the bobbin thread tension is easy, so we will not cover it here. And we will better touch on the process of adjusting the tension of the upper thread, which consists in tightening the screw that compresses the plate-shaped washers. So, to check, take a small piece of fabric and sew it. If the loops come out dangling, then the upper thread is too loose or too tight. If the seam is relatively even, then we look - on which side the knots of the plexus of the lower and upper threads are more noticeable. Nodules are usually easily felt with a finger. If the tension is adjusted correctly, the nodules will not be felt at all.
Step 5
So, we draw conclusions:
The nodules are located approximately in the middle of the seam and cannot be felt (practically not felt). This indicates that the thread tension is optimal.
The knots are felt on the underside. This means that the upper thread is not tight enough.
Knots are felt on the upper side of the seam. In this case, the upper thread tension is too high.
The loops turn out to be hanging - the tension of the upper thread deviates greatly from the norm, both in one direction and in the other.
The seam will be weak and unusable if the bobbin thread is loose on the bobbin case or not pulled at all. The upper thread also has a weak tension.
Step 6
The presser foot pressure can be adjusted using a spring. Automatically, this setting is carried out in the most advanced models of sewing machines. For sewing sufficiently thick materials, the presser foot can be raised to a height of 12 mm. If the presser foot presses heavily on the fabric, this can cause the layers to be stitched to shift, make it difficult to move, and sometimes tear the fabric. If the presser foot has little or no pressure on the fabric, an incorrect seam will result.
