In the process of garment making, many auxiliary lines need to be used. Although these lines are not the lines that we ultimately need, they are indispensable for the completion of the entire garment plate-making work. These auxiliary lines are actually the framework of the garment structure. The accuracy of the framework is directly related to the accuracy of drawings and templates. Given that these frameworks are generally straight lines, their main feature is "straight."
In the process of making plates, we often extend certain auxiliary lines as needed. The normal operation method is to use a ruler to extend directly, but it is difficult to grasp the extended portion along the original direction. In fact, a considerable number of garment pattern distortions are directly caused by the deflection of the frame auxiliary line. Then, what can we do to ensure that the drawn frame straight line and the continued straight line do not have large skew?
In fact, it is very simple. We know that whether we draw a straight line or continue drawing a straight line involves the problem of drawing the baseline. If we do not consider the baseline when we draw the line, the drawn or continued line must be skewed.
In general, when drawing the first straight line, the reference line is the edge of the template paper or drawing paper. Because the horizontal and vertical sides of the paper are generally in a standard vertical relationship, they are relatively reliable original reference lines. Whether it is drawing a straight line parallel to the paper edge or a straight line perpendicular to the paper edge, pay attention to the actual positional relationship with the paper edge. The ruler used by the operator is a relatively standard measure tool. The ruler and the triangle can perform the drawing operations of the parallel line and the vertical line. However, unfortunately, many operators still cannot grasp the parallelism. Why is this vertical? The reason is error. This is probably due to their lack of understanding of the principles of error formation.
We know that two points determine a straight line. When you draw a straight line, you only need to find two key points. The two key points are not on the straight line you want to draw, but on the reference line. The size of the error is related to the distance of the key point. We only need to remember that the greater the distance between two key points on the datum reference line, the smaller the error in the straight line direction drawn on this basis. With this common sense in mind, we can easily reduce the directional error of an auxiliary line during the future drawing and drawing process. When drawing lines that are parallel or perpendicular to the edges of the paper, we only need to find two key points. Within the allowed length of the drawing rule, the distance between the two key points can be as long as possible to effectively reduce the error. .
It is worth pointing out that in the process of drawing, we did not always use the edge of paper as a baseline. Many lines drawn inside the drawing are based on nearby straight lines. Our principle is to take two points as far as possible on these reference lines as key points. In addition, we must avoid using the short straight line segment as a baseline. If possible, it is best to use the original baselineâ€”the edge of the paperâ€”as the baseline, which minimizes the cumulative error of the cartographic line.
The same goes for the straight line. Continuing to draw a straight line, the baseline of this operation is the line itself. Then the two key points we choose on this line must be as long as possible. If you use a straight ruler to continue drawing this straight line, we must make this fairly long part of the ruler coincide with this straight line, so that the straight line that is drawn continues to maintain the original straight line as ideally as possible. Many operators ignore this detail and draw the line as a "fold line". This is something we must pay attention to.
Placing a garment model is a job that garment technicians often do, and ensuring the accuracy of pushing is the basic requirement for this job. At present, we often use the push-pull methods mainly include the following: point grading method, cymbal pushing method, dragging and pushing method, general drawing pushing and pushing method and similar shape pushing and releasing method and so on.
The point grading method is generally to draw the structure line by line on a special grading paper, and finally to form a general plan for pushing the file. Since the maximum number or minimum number can be introduced first during operation, and then the other files are equally divided in the middle, equal division means that the error tends to decrease, so that the push plate method can be well reduced. error.
During the push operation, the templates are regularly arranged. When stepping between the files of these regular layouts, it is best to calculate the difference between the maximum and minimum gears, and first control the distance between the two gears. All other files only need to be arranged according to the principle of equal division. This minimizes errors.
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