Originally computer programmers weredeveloped to grade garment patterns into a range of size for lay planning &marker making. Today there is major system that has the further facility fordesigning patterns & altering patterns to the size & fit for an individualcustomer.


The computer is a very useful tool,it when used correctly can increase accuracy and productivity & manageinformation. This removes the time consuming tasks of cutting card pattern& planning & drawing markers by hand & duplication of hand writteninstructions. This computer technology has enabled the clothing design, patternconstruction & product development to be integrated into a continuousprocess.


The invention of a computerizeddigitizer by Dr. H.J.Gerber in 1964 brought revolution in the apparelproduction technology. A typical system has two main functions- Pattern gradingand marker planning with a number of other options available such as- Patterndesign system- A programme which enables patterns to be constructed directly fromblock patterns or by modifications to existing styled patterns.

Digitizer


Digitizer tablets or graphicstablets are pressure-sensitive data input devices that allow users to selectand draw images with a special pen called a stylus or a mouse-like devicecalled a puck.


Pucks feature a series of buttons and a lens with crosshairsthat allows users to select images with greater accuracy. Both pens and puckscan be wireless devices or attached to digitizer tablets via cords or wires. Typically, pucks are used to trace highly detailed engineeringdrawings or medical X-rays while pens are used for a variety of sketching andtracing applications. With digitizer tablets, producing an image creates aseries of X,Y coordinates as either a continuous stream or a series of endpoints. Pens that record vector graphics in three-dimensional space are alsoavailable. The drawings that users produce with digitizer tables are stored asmathematical line segments. Outputs can be sent to computer aided design (CAD)applications, graphics programs, or related software applications.


Description of digitizer

  • This unit consists of a digitizing work table and a free floating cursor which are used to convert shapes into the format understood by the computer.
  • Underneath the plastic surface of the table, there is a fine printed network of wire lines, similar to that of graph paper, which when used in conjunction with the cursor, provides a high resolution grid for defining any position on the tables surface.
  • The cursor itself has two hairlines engraved on the viewing glass and the intersection of these two lines is used as the datum point.
  • When the cursor is placed on a line and the correct button pressed/pushed, the x and Y co-ordinates of the points location are registered by the computer.
  • This is repeated around the pattern until the outline and internal marks such as darts and pockets positions are all entered.

Operational procedure:


Pattern Adaptation and Alteration


After digitizing the basic pattern graph on the computer, the pattern is altered as per need and demand of the consumer. Many designs can be created by adapting basic pattern in pattern making software.

Author is Assoc professor and Head, Department of Textiles and Apparel Designing, College of Home Science, MPUAT, Udaipur (Raj.)