The stitch length adjustment of a coverstitch machine is a key step in optimizing sewing quality, directly affecting the density and uniformity of the stitches. Through an illustrated guide, users can intuitively understand the adjustment process, which typically involves rotating the stitch length dial or adjusting the corresponding control lever. For different fabric requirements, stitch length settings should be adjusted flexibly to ensure tight and secure stitches that do not easily loosen.
The table below summarizes common stitch length ranges and their suitable applications for quick reference:
|
Stitch Length (mm) |
Applicable Fabric Type |
Expected Stitch Effect |
|
1.0–2.0 |
Lightweight elastic fabrics |
Fine and even |
|
2.0–3.0 |
Medium-thickness knits |
Standard density, durable |
|
Above 3.0 |
Heavy materials or overlock stitching |
Loose, anti-fraying |
Before making any adjustments, it is recommended to turn off the power and clean the needle plate area to prevent dust from affecting adjustment accuracy, thereby improving the efficiency of subsequent feed dog height calibration. In addition, the illustrated steps clearly demonstrate the linkage of the needle bar swing amplitude, providing a solid foundation for adjusting elastic fabrics.