Sewing Thread Winding System | Different Types Winding | Precision winding | Parallel winding

A transformer winding in which all the turns are arranged on a bobbin instead of in the form of a disk. Generally used for the high-voltage windings of small transformers.

Different types of Sewing Thread winding system

Precision winding: 

• Constant winding ratio

• Winding angle reduces with increasing diameter

• No pattern areas

• Good off-winding characteristics

• High package density

Step precision or digicone winding:

• Almost constant winding angle

• The wind ratio is reduced in steps

• Combines the advantage of random and precision winding

• No pattern areas

• Higher consistent package density

• Perfect unwinding characteristics

• Straight sided packages

Random winding: 

• Winding angle is kept constant since the winding ratio reduces with increasing diameter

• Stable packages

• Even density

Pineapple winding:

• Winding traverse reduces to produce packages with tapered edges

• Required for filament winding operations

• All three types of winding applicable

Parallel winding:

• Very high package density

• Thread vertical to package axis

• Relatively short lengths of thread

• Suitable for side unwinding

• No pattern areas 5,6

Ball winding:

• Very easy unwinding 

• Winding takes place in 4 stages:

1. Rough base winding

2. Form winding

3. Surface layer winding

4. Circumferencial winding

Skein winding:

• Easy unwinding

• Very small parallel strand of soft twisted thread.