Transcript Digitising pros and cons

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Copying and
reverse
engineering
Digitising of complex forms
for replication and remanufacturing
Slide 1
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Copying and reverse engineering
Digitising is a way to gather a large
volume of data to define the surface of a
complex, unknown component
It uses many of the techniques needed for
scanning, except that the motion of the
CMM is controlled in a different manner.
Slide 2
On known parts, the probe can move in a
pre-defined vector, accommodating any
measurement errors in its travel. By
contrast, on an unknown part the probe
is moved within a pre-defined grid and
the probe deflection is used to
determine which way to move the CMM
to keep the probe stylus in constant
contact with the surface.
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Digitising pros and cons
Benefits
• High speed data collection
– Scanning is all about capturing
lots of surface data quickly.
Scanning probes can record
100s or 1,000s of points per
second.
Slide 3
Disadvantages
• Wear on the stylus
– Friction between the stylus
and the part causes wear.
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What is digitising?
Scanning (digitising) is a method to gather
data about an undefined 2D or 3D
shape
The captured data can then be used to
create NC part programs or CAD
outputs
Slide 4
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Digitising
Re-manufacture and reverse engineering
• Digitising a master part
to acquire an accurate
description of the
surface
• Scanning cycle and
data analysis handled
by Tracecut software
• Digitising can be
performed on CMMs,
machine tools or
dedicated platforms like
Cyclone
Slide 5
Digitising provides large amounts of data
to define unknown contoured surfaces
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Digitising sensors
Renishaw’s analogue sensors
provide accurate, high density
data (up to 1,000 points per
second)
Slide 6
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Digitising sensors
Renishaw’s analogue sensors
provide accurate, high density
data (up to 1,000 points per
second)
Laser scanners provide high speed
data capture and are ideal for
digitising soft materials
Slide 7
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Data capture platforms
Renishaw supports a range of data
capture platforms:
– machine tools
– CMMs
– Cyclone
CMMs
Cyclone
Machine
tool
Slide 8
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Integrated scanning on machine tools
OEMs who support scanning on
machine tools include:
• Fanuc Renscan 400
• OSAI integrated scanning
Slide 9
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Tracecut software at the heart of the scanning process
CAD
> 15 formats
Data capture
> 100 devices
Slide 10
Machining
> 85 CNCs
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Key features of Tracecut
Digitising
• Master parts can be scanned in
several orientations
Slide 11
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Key features of Tracecut
Data modeling
• Scan data is assembled into
wireframe or rendered models
Slide 12
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Key features of Tracecut
Tracesurf
• Surfaces can be generated in STL
or IGES for output to CAD
Slide 13
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Key features of Tracecut
Machining
• Flexible machining options and
tool path verification
Slide 14
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Digitising applications
Applications
• Automotive
• Turbine blade refurbishment
• Coins, medals and giftware
• Shoes
• Medical
• Toys
• …and many, many more!
Slide 15