Singer 321D, 321K instruction manual Troubleshooting

Page 21

Troubleshooting

Problems

Possible Causes

Possible Solutions

Broken needle

Broken thread

Skip stitches

Failure in stitches

1.Needle installed the wrong way.

2.Wrong kind of needle.

3.Damaged needle.

4.Wrong relation with needle guards.

5.Wrong relation with looper.

6.Needle is not centralized with the hole at the needle plate or the presser foot.

1.Low quality thread.

2.Thread is thicker than the eye of the needle.

3.Wrong passage of thread.

4.Thread tension too tight.

5.Needle wrongly set.

6.Thread stand wrongly set.

7.Needle overheating.

8.Tension disk or guides with burrs .

9.Wrong relation of needle with looper .

10.Needle, looper, needle plate and guides have burrs.

1.Wrong relation of needle with looper.

2.Wrong passage of thread.

3.Needle installed the wrong way.

4.Inadequate tension of thread.

5.Point of looper damaged.

6.Needle damaged.

7.Wrong installation of needle guards.

1.Wrong threading.

2.Thread is thicker than needle hole.

3.Wrong thread tension.

4.Needle thread is not lubricated.

5.Wrong relation of needle with looper.

1.Install the needle correctly.

2.Use needle adequate for cloth and thread.

3.Replace for a new one.

4.Adjust needle guards.

5.Adjust the looper.

6.Adjust the needle plate or the presser foot.

1.Use good quality thread.

2.Use adequate needle to cloth and thread.

3.Pass thread correctly.

4.Adjust the thread tension unit.

5.Set needle correctly.

6.Set the thread stand correctly.

7.Fill in silicon oil or adjust needle guards.

8.Replace the parts.

9.Adjust the synchronism of needle and looper.

10.Replace the part.

1.Adjust the relation of needle with looper.

2.Pass thread correctly.

3.Install needle correctly.

4.Adjust thread tension button.

5.Replace the part.

6.Replace for a new needle.

7.Adjust the needle cover.

1.Pass thread correctly.

2.Use proper needle hole for cloth and thread.

3.Adjust the thread tension units.

4.Fill in the silicon oil.

5.Adjust the needle and looper.

Ultra High Speed Overedge and Safety Stitch Machine Instruction Manual and Parts List 18

Image 21
Contents 321D Contents Contents Safety Instructions For Safe Operation Product Description Product Description Machine SpecificationMachine Specification For 321D series Motor Motor Pulley V-Belt SpecificationsTable Cut-Out Diagram Setup and Adjustment InstructionsMachine Installation 2cm Lubrication Oil Drainage Fill Silicon Oil to Reservoir Needle Attachment Or ReplacementReplacing the upper knife Replacing Upper Lower KnifeMachine Threading DiagramThreading EasyThread Tension Adjustment Presser foot pressure Adjusting Differential Feed RateStitch Length Adjustment Parts Relation and Timing Oil Change Filter Cleaning Machine Head CleaningSafety Inspection Troubleshooting Troubleshooting Parts list Machine Bed Frame Components Machine Bed Frame Components Machine Cover Components Machine Cover Components1 31 32 Machine Cover Components Crank Shaft Drive Components Description Qty Thread 20702001 Crankshaft 20702050 Thread Tension Components Thread Tension Components Components Thread Guide Take-upThread Guide Take-up Components For 3-thread and 4-thread Thread Guide Take-up Components Thread Guide Take-up Components 20713054 Needle Bar Components Needle Bar Components For 3 thread For 4 thread For 5 thread Xxxxxxxx Needle Plate Needle Guard Components Needle guard Front S01027 Screw Upper Looper Components Upper Looper Components Lower Looper Components Lower Looper Components Chain Stitch Looper Components Chain Stitch Looper Components Chain Stitch Looper Components Chain Stitch Looper Components Differencial Feed Components Differencial Feed Components Feed Dog Components Main feed dog assembly Knife Drive Components Xxxxxxxxx Presser Foot Components Spring except 321D-251H / 321K-251H Lubrication Components Lubrication Components Lubrication Lubrication Components Silicon Oil Reservoir Components Silicon Oil Reservoir Components Exclusive Parts List for 321K series Exclusive Parts List for 321K series Thread Stand Components Thread Stand Components Accessories Accessories Machine Support Plate For Semi Submerged Components Xxxxxxxx Specific Parts for 321D-251H and 321K-251HParts OptionalOptional Parts Back Latch Components Back Latch Components Option parts Vacuum Suction AFL DeviceAFL Device Option parts Vacuum SuctionCutter Device ChainList Rev.05 Jun.2010

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.