APPAREL MANUFACTURING - I 3(1+2)

Lesson 7 : Pattern Grading

The principles of computer grading

The principles of computer grading are

1. The computer constructs diagrams by using mathematical co-ordinates which can be recorded by placing the pattern on a digitizer which works as an electronic grid and it records special points around the shape by means of cursor.
2. The centre of cross hairs of the cursor is placed on the points to be recorded.
3. When the cursor button is pressed signals are sent to the computer which is translated into a numerical record of the shape and information for the piece.
4. Once a basic shape, its significant features and grading information is stored in the computer memory.
5. Then range of sizes can be graded and plotted out onto pattern paper or used to construct lay plans for production markers.

Computerized pattern grading can be an integral part of sizing technology as long as the actual grading system used is correct. The computer cannot make a good grading system out of a bad one but can, if properly used, complement and enhance an accurate and efficient system.