Types Of On-Line Quality Control System

Quality Control System

On-line quality control is a system that is performed during manufacturing. During this checking, if any faults are found in materials, one should take necessary steps to reduce the fault or to stop the process and take necessary steps to recover it.

Types of Quality Contro System

There are two types of quality control systems; one is an off line quality control system and another is an online quality control system.

Online Quality Assurance System:

Identically, online quality control comprises raw material quality control and process control. Online quality control consists of –

• Raw Material Control
• Process Control

Raw Material Control:

As the quality of the product depends on the raw material quality so we must be provided the best quality raw material with an economical consideration.

• Firstly, the fabric must be without fault, with proper absorbency, and whiteness as per the requirement of the subsequent process. The Greige inspection report gives the condition of the raw fabric. The information found on a greige report is given below-

Penalty Point Legends	Code
Hole	H
Oil stain	OS
Chemical stain	CS
Water spot	WS
Fly yarn	FY
Rub mark	R
Dye stain	DS
Dirt stain	D
Rust Stain	RS
Yarn Contamination	YC
Inspect spot	IS
Grease stain	GS
Missing yarn	MY
Drop stitch	DS
Needle line	NL
Uneven Tension	UT
Stripe	S
Thick & Thin place	TT
Slubs	Sl
Sinker Mark	SM
Birdseye	BE
Wrong Design	WD
Pinholes	PH
Barre mark	BM

• Secondly, the chemical should be of known concentration with a higher degree of purity.
• Lastly, the entire machine should be higher precisions.

Process Control:

The method chosen for the process must be provided with the necessary accurate parameters. The specific gravity, water level, residual hydrogen peroxide, etc. at each stage should be checked.

So, be careful during quality checking.