Winding is the process of transferring yarn from one spinning bobbin to another suitable package. Winding is classified in different ways. Depending on the density of the package; winding is classified as
- Precision winding
- Non precision winding
Precision winding: When the successive coils of yarn on a package and laid close together and parallel or nearly parallel with each other, then it is possible to produce a very dense package in which maximum amount of yarn is stored in a given volume is called precision winding.
Features of precision winding: There are a lot of features of precision winding. Followings are the features of precision winding:
- Reciprocating motion is used for wound the package.
- Patterning or robbing causes damage of package.
- It contains more yarn.
- Its stability is low.
- It is hard and more compact.
- Flange may be used.
- Packages are dense.
- Unwinding process rate is low and process is harder.
- The wound coil is arranged parallel or near parallel.
Non precision winding: This type of package consists of single thread which is laid on the package at appreciable helix angle, so that the large cross one another and give stability and a less dense package is produced is called non precision winding.
Features of non precision winding: Low density package is produced in non precision winding. Followings are the features of non precision winding.
- Only one coil is used.
- Winding is done in cross angle.
- Minimum yarn is stored.
- Packages are soft and less compact.
- Stability of this package is high.
- Low density package.
- Flanged is not necessary.
- Unwinding rate is high and process is easier.
Difference between Precision Winding and Non Precision Winding
| Precision Winding | Non Precision Winding |
|---|---|
| The wound coil is arranged parallel or near parallel. | The coil is cross wise wound. |
| The yarn density of the yarn package is high. | The yarn density of the yarn package is low. |
| The stability of the package is low. | The stability of the package is high. |
| The unwinding rate is low and process is harder. | The unwinding rate is high and process is easier. |
| The yarn package is hard and more compact. | The yarn package is soft and less compact. |
| The flanged package may be used. | The package is not necessary to be flanged. |
| Difficult to dye, only surface of the yarn is dyed properly. | Easy to dye. |
| process is less hairy. | Process is more hairy. |
After winding, warping and sizing is done for make a weavers beam.
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