Issue link: https://docs.hic.us/i/403552
It should also be noted, that as the bobbin unwinds, the tension tends to decrease. So while the first run looks good, successive runs may develop problems as the bobbin gets used up. In fact, the last 10% of the bobbin should be considered unusable and it should be discarded. The Design Has The Proper Density. Density refers to the amount of coverage by the top threads in a given area. For example, a density setting of 65spi, means there are 65 stitches contained per each linear inch of coverage. A higher spi setting, means more stitches in the same one inch area. Obviously, if your density setting is too low, then the fabric can be seen through the design. Our natural tendency with see-thru embroidery is to immediately increase the density. But sometimes this makes the situation worse. If you use too much density it can cause puckering of the fabric around the design or a distortion of the design itself. (High density fills are sometimes referred to as bulletproof, for obvious reasons.) Another symptom of too much density is thread breaks and sometimes needle breaks. The density should be increased gradually and tested on scrap fabric until the proper settings have been determined. The worst case is a white fill on a dark fabric or dark fill. Due to the extreme contrast in colors, this situation can rarely be fixed by increasing the density. A better solution is to lay down a piece of tear-away backing as a topping, immediately prior to the sewing of the problem area. As soon as the area has been sewn, stop the machine and tear off the excess backing. Then continue sewing. This provides a solid white backdrop for the white thread and successfully masks the fabric color from showing through. Figure 10 – Bleed-Thru (on boat) The Design Is Straight And Correctly Placed. Another one of those obvious quality issues. The operator must take special care to ensure that the embroidery is in the correct location and straight. Crooked is not acceptable. This means taking the time to make a precise measurement. Never assume that the lines in the fabric are straight. It's tempting to use them as a reference point, but many times the fabric itself is crooked. Use a device such as a measuring angle, which looks like a capital "L". Use safe reference points such as where the shoulder seam meets the neck and then measure from there. In the case of a placket shirt, use the placket as a reference point, assuming it's straight. But what happens when key reference points such as the placket, or maybe a pocket, are crooked? Take a look at the visual perspective of these key components. If you are www.hsi.us care@hsi.us 169