Troubleshooting

Problems

Uneven Stitches

Puckering

Poor

chain-off stitches

Possible Causes

1.Wrong threading.

2.Wrong installation of thread stand.

3.Wrong setting of lower knfe.

4.Knives does not cut perfectly.

5.Thread guide or tension disc with burrs.

6.Needle point damaged.

7.Inadequate height of feed dog.

8.Inadequate thread tension.

1.Thread tension is too strong.

2.Inadequate pressure on presser foot.

3.Inadequate height of feed dog.

4.Knives does not cut perfectly.

5.Differential feed is not correct.

6.Needle is too thick.

1.Incorrect presser foot.

2.Inadequate synchronism of lopper cam.

3.Chain stitch looper installed wrongly.

4.Wrong passage of thread.

5.Thread tension inadequate.

6.Wrong relation of needle with looper.

7.Needle plate or presser foot with burr.

8.Rough thread tension disc.

Possible Solutions

1.Threading correctly.

2.Install thread support correctly.

3.Adjust lower knife correctly.

4.Adjust or replace knives.

5.Replace the part.

6.Replace the needle.

7.Adjust the height of feed dog.

8.Adjust thread tension.

1.Adjust thread tension.

2.Adjust pressure on presser foot.

3.Adjust the height of feed dog.

4.Adjust or replace knives.

5.Adjust differential feed ratio.

6.Use proper needle to cloth and thread.

1.Adjust presser foot correctly.

2.Adjust looper cam.

3.Adjust looper correctly.

4.Pass thread correctly.

5.Adjust thread tension.

6.Adjust relation of needle with looper.

7.Replace the part.

8.Polish thread tension disc.

Ultra High Speed Overedge and Safety Stitch Machine Instruction Manual and Parts List 19

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Singer 321K, 321D instruction manual Troubleshooting

321D, 321K specifications

The Singer 321K and 321D are revered sewing machines that cater to both novice sewists and experienced crafters alike. Renowned for their durability and user-friendly features, these machines blend traditional craftsmanship with modern technology. Their compact design makes them ideal for home use, while providing the performance needed for a variety of sewing projects.

One of the standout features of the Singer 321K and 321D is their robust build quality. Designed to withstand the rigors of regular use, these machines come with a metal frame that ensures stability and minimizes vibrations. This solid construction contributes to consistent stitching, allowing users to tackle everything from delicate fabrics to heavier materials with confidence.

Both models feature a versatile selection of built-in stitch options, catering to a wide range of sewing styles and projects. The stitches include straight, zigzag, and decorative patterns, enabling users to unleash their creativity with ease. Additionally, the adjustable stitch length and width provide further customization, allowing sewists to achieve precise results for any task.

Another highlight of the Singer 321K and 321D is their intuitive threading system. The machines are designed with a simplified threading process, complete with color-coded guides and an automatic bobbin winding system, which significantly reduces setup time. This user-friendly design is particularly beneficial for beginners who may be learning the ropes of sewing.

For added convenience, both machines feature a free arm, making it easier to sew cylindrical items such as sleeves and hems. The removable accessory storage compartment allows for easy access to tools and notions, keeping the workspace organized and efficient.

In terms of performance, the Singer 321K and 321D boast a powerful motor that delivers consistent speed and precision, making them suitable for various sewing tasks, including quilting, alterations, and garment construction. The machines also come with adjustable presser foot pressure, ensuring optimal fabric feed for different thicknesses.

Safety is another key consideration, as these machines include features like a built-in needle threader and safety switch. This ensures that users can sew with peace of mind, knowing that the machine prioritizes user safety while providing exceptional functionality.

In conclusion, the Singer 321K and 321D are remarkable machines that combine traditional sewing principles with contemporary technology. Ideal for both beginners and seasoned sewists, their durability, versatility, and user-friendly features make them a standout choice in the world of sewing machines. Whether for simple repairs or intricate creations, these models are a valuable addition to any sewing enthusiast's toolkit.