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CAD systems in Fashion and Textile Industry

Jimmy LamThe Hong Kong Polytechnic University

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Agenda

CAD background. CAD in Fashion & Textile industry

Woven design; knitted design; printed design and fashion design

CAD in Garment Production Specification sheet; grading and marker making

3-D body scanner Virtual shopping & e-Commerce

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Computer Aided Design (CAD)Background (I)

Emerged in the 1970s

Original functions – drafting and technical For aerospace industry, car industry To replace manual drawing by computer-based tools. E.g replace typer-writer by computer-based word

processing, MS Word Apply to garment industry in late 70s in:

pattern-making, grading, maker-making areas WHY and How?

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CAD background (II)

The widespread use of CAD has enable design firms to be more efficient and competitive

Today’s CAD software is available as either industrial or commercial

Industrial software focuses on specific industry need and often cost higher than commercial ones

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Systems used in Fashion and Textile design

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In woven textile designs

What are the special features need for woven textile design?

Yarn dyes, plain weaves, jacquards or dobbies could be designed using CAD

The designers can be employed by a manufacturer, design house, textile producer or work freelance

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Woven design

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In knitted design

What are the special features needed for knitted design?

Software is used to create and modify knitted fabrics and garment parts

Some systems generate preview on screen of resulting design effects, with all stitch information

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In printed design

Are any unique features for printed fabric design? How?

Involves the development and manipulation of a motif

Repeat Generating colourways Colour seperation

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Repeats

Half drop and half tone are Unique CAD feature on textile printing

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Colour separation

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In fashion design

Illustration system Texture mapping/

draping Virtual imaging Embroidery system

What special features are neededFor Fashion design?

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Garment Production

What CAD features are required for garment production?

How it can be applied in cutting, sewing andproduction operation?

Can it be used for production control, cost control?

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Garment manufacturing (I)Specifications and Costing

This systems store style information including:

Flat sketch Size spec Trim requirements Size grade charts

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Specifications sheet created by SpecView pre-production system

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What are the essential

Requirements for grading

System? The system

automatically produce pattern shapes in all the pre-specified sizes

Garment Manufacturing (2)Grading Systems

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Can computer marker system replace human judgement?

Marker – arrangement of all pattern parts for max. fabric utilization

The system indicates the percentage of waste

Automatic matching of stripes and plaids is common to most systems

Garment Manufacturing (3)Marker Making Systems

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Websites of CAD Retailers

www.fashionflash.com www.monarchcad.com www.lectra.com

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Questions

What are the specific requirements on CAD system for 1) woven design; 2) knitted design and 3) printed design?

What are the specific requirements on CAD system on garment manufacturing systems for 1) product specification; 2) grading and 3) marker making

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Advanced Topics on CAD

3-D Body Scanner for e-Commerce Virtual Shopping on Internet

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Electronic body scanningAdvanced CAD for e-Commerce

Why we need 3-D body scanning for e-Commerce?

A new trend in customizing clothing

After scanned, customers could used the measurement information for internet shopping e.g. ez-size

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Applications for 3-D body scanner

Retail E-Commerce Apparel Industry Clothing Design Anthropological Studies Automotive Design Ergonomic Research Computer Game Development Medical Applications Dress Form Manufacture Personal Fitness Industry

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How’s 3-D body scanner work?

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Example of 3-D body scannerFrom US TC2

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Example from Cyberware

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Virtual Shopping

Released by the military to show capabilities of scanning and 3-D viewing with garment application

E.g. Brook Brothers’ digital tailoring

http://www.brooksbrother.com/

http://www.cyberware.com

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Questions

What is 3-D body scanner? What are the advantages of 3-D body

scanner? Are there any limitations for 3-D body

scanner? Why virtual shopping is still not popular in

Hong Kong?