1 cad systems in fashion and textile industry jimmy lam the hong kong polytechnic university
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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?