Transcript No Slide Title

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SP600 family of
analogue scanning probes
Compact scanning probe with
rapid dynamic response for high
speed measurement
Slide 1
technology
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SP600 family of
analogue scanning probes
Q. What should an ideal scanning system offer?
Q. What are the SP600 family of probes?
Q. Where can these probes be used?
Q. What comprises the SP600 system?
Q. What’s the specification and performance?
Q. How do I compare SP600 with competitor offerings?
Slide 2
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What should an ideal scanning system offer?
 High speed, accurate scanning of the form of known
and unknown parts
 Rapid discrete point measurement when measuring
feature position
 Flexible access to the component to allow rapid
measurement of all critical features
 Easy interchange between stylus arrangements and also
between other types of sensor, including touch-trigger probes
and non-contact sensors. This allows optimised choice of
stylus/sensor to each measurement application
 Minimum stylus wear
 Reliability, productivity and low cost of ownership
Slide 3
Renishaw’s SP600 scanning probe
family gives you all this functionality
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What are the SP600 family of probes?
Renishaw’s SP600 product family are analogue scanning probes
providing high-performance inspection, digitising and profile
scanning, and are suited to a wide range of CMMs
3 models are available, designed to suit varying CMM mounting
arrangements and diverse application requirements:
SP600
SP600M
SP600Q
Shank Mounted
Autojoint Mounted for use
with articulating heads
In-Quill Mounted
Uses a shank adaptor
to suit the CMM
Slide 4
All 3 models have identical sensor mechanisms and specifications
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What are the SP600 family of probes?
What is an ANALOGUE scanning probe anyway?
– a probe that gives a continuous reading at any time while in
contact with the part
– an integral part of the CMMs motion control system - giving
real time response X, Y and Z outputs
– a probe whose output is proportional to its deflection
The SP600 probe family are PASSIVE sensors (as
opposed to ACTIVE sensor type) - so SP600 gives:
– simple, compact, accurate and high-performance design
– robust with high resistance to most collision damage
– use of short, light, simple and rapidly interchangeable
styli
Slide 5
– long service life, reliability and low cost of ownership

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Where can these probes be used?
SCANNING applications
– controlling the form or profile of complex
surfaces or features that form functional fits
with other parts
– determining the feature position, accurately
measuring the feature size and identifying
errors in the feature’s form or shape
– data capture speeds of up to 500 points per
second (with UCC1) giving significantly
improved productivity over other sensing
methods
Slide 6
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Where can these probes be used?
Scanning a cylinder block
• Typical scanning
routine, measuring
precision features
where form is critical to
performance
Slide 7
Scanning provides much more
information about the form of a feature
than discrete point measurement
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Where can these probes be used?
DISCRETE POINT MEASUREMENT applications
– not quite as fast as using a dedicated touch
trigger probe but still very viable where
requirement is secondary to scanning work
– extrapolate to zero routines have no need to
pause and give averaging for best measurement
results
– most features on most parts are best measured
with discrete point measurement so ability to do
this effectively with a scanning probe is of great
benefit
Slide 8
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Where can these probes be used?
Discrete point measurement
Video commentary
• Scanning probe
taking discrete
points at high speed
• ‘Extrapolate to zero’
routines
• High speed
scanning
Slide 9
Scanning probes must be able to measure
discrete points quickly
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Where can these probes be used?
DIGITISING applications
– capturing large amounts of data about an
unknown surface
– creation of CAD models
– uses many of the same techniques as scanning
REVERSE ENGINEERING applications
– digitised data can be exported to CAD for
reverse engineering purposes
– used to generate a machining program for
re-manufacture
Slide 10
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Where can these probes be used?
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 11
Digitising provides large amounts of data
to define unknown contoured surfaces
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What comprises the SP600 system?
SCANNING PROBE - 3 variants to meet your need:
SP600
– simple shank mount via adaptors and with external cabling
SP600M
– patented Autojoint mount for fitment to Renishaw’s PH10M &
PH10MQ indexing heads, the PHS1 servo positioning head
and also the PH6M fixed probe head - note that the ability to
articulate the probe brings maximum application flexibility to
the majority of CMMs
SP600Q
Slide 12
– fixed in-quill mounting ideally suited to smaller CMMs where
‘Z’ space is limited and probe articulation is not required
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What comprises the SP600 system?
STYLUS MODULES - to give you more flexibility:
– allow rapid and repeatable interchange between
optimised styli arrangements without the need for
re-qualification of the styli tips
– save you time and ensure you can easily use
best styli configuration for the application
the
SCR600 STYLUS CHANGE RACK
– simple passive operation and ability to carry up to
4 stylus modules - use multiple racks if required
– rapid module changing with excellent repeatability
so eliminating need to re-qualify the styli tips
– increases your productivity significantly through
shorter inspection cycles
Slide 13
– crash protection in-built into the design
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What comprises the SP600 system?
MODULAR STYLUS CHANGER SYSTEM
MRS - modular rack system
– offering choice of rail lengths to carry
individual SCP600 ports
– modular legs to provide variable height
adjustment
SCP600 - individual stylus change ports for
SP600 stylus modules
– choose the number you need for your
applications and simply mount them onto
the MRS - easy programming of change
cycle
Slide 14
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What comprises the SP600 system?
INTERFACE CARD - choice of two...
- analogue counter card performs probe
management functions
- connects directly to a standard Renishaw multiwire
probe signal cable
AC1 - 8 bit ISA bus adaptor card
- gives 1.0 µm resolution
- compatible with 8 bit PC expansion slot
AC2 - 16 bit ISA bus adaptor card
- gives better than 0.1 µm resolution
- compatible with 16 bit PC expansion slot
Slide 15
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What’s the specification and performance?
Slide 16
Measurement range
±1mm in all axes and orientations (50mm stylus)
Linear and Parallel motion in all axes
Resolution
AC1 gives 1.0µm
Spring rate
1.2 N/mm nominal in all directions
Damping
20% (X, Y, Z) typical at 23°C
Operating temp
10°C to 40°C
Physical mass
SP600 172g / SP600M 216g / SP600Q 299g
Physical size
SP600: 50mm max x 89mm (excl shank)
SP600M: 50mm max x 107.5mm
SP600Q: 60mm ‘’ flange x 99mm
Max stylus lgth/mass
280 mm/20 g
Data collection rate
Up to 500 points per second (with UCC1)
Service life
Renishaw’s service records indicate an
operational life in excess of 50,000 hours
whilst
AC2 gives <0.1µm
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What’s the specification and performance?
Discrete point measurement results (3D tests)
PROBE
TP7
TP200
SP600M
Styli (lgth x ball diam)
50 x 6
10 x 3
20 x 3
ISO 10360-2
0.74µm
0.78µm
0.83µm
B89
1.27µm
1.46µm
1.47µm
PROBE
Slide 17
SP600M with extended styli operation
Styli (lgth x ball diam)
50 x 6
100 x 6
150 x 6
ISO 10360-2
1.27µm
1.61µm
4.93µm
B89
1.91µm
2.55µm
5.00µm
Test conditions
CMM spec’n:
U3 =0.9+L(mm)/500mm
Controller / Head: UCC1 / PH10MQ
Ring Gauge:
Datum Ball:
50mm Grade AA, Form error 0.35µm
25mm Grade 5, roundness 0.08µm
Probe: SP600M
Styli: Ball stylus - lgth & diam as above
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What’s the specification. and performance?
FORM ERROR
Scanning results (2D tests)
VDI / VDE 2617
V2 = 0.88µm
ADAPTIVE PATH
Filtered data
Radius
23.49
Slide 18
23.495
23.5
Test conditions
CMM spec’n:
U3 =0.9+L(mm)/500mm
Controller / Head: UCC1 / PH10MQ
Ring Gauge:
Datum Ball:
50mm Grade AA, Form error 0.35µm
25mm Grade 5, roundness 0.08µm
Probe: SP600M
Styli: 50mm long x 6mm ball diameter
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What’s the specification and performance?
Scanning results (3D tests)
ISO 10360-4
THN = 2.6 µm
Time = 70 secs
A circle
B Circle
13
13
A Circle
8
B Circle
8
Sphere
Sphere
A circle
3
B Circle
3
+ 1.2 µm
+ 1.2 µm
- 1.4 µm
-17
Slide 19
-12
-7
-2 -2
3
8
13
- 1.4 µm
-17
-12
-7
-2
-2
-7
-7
-12
-12
-17
-17
3
8
13
C ½ Circle D ½ Circle
Test conditions
CMM spec’n:
U3 =0.9+L(mm)/500mm
Controller / Head: UCC116/ PH10MQ
14
Ring Gauge:
Datum Ball:
50mm Grade AA, Form error 0.35µm
25mm Grade 5, roundness 0.08µm
16
14
Probe: SP600M
Styli: 50mm long x 6mm ball diameter
8
8
Sphere
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Sphere
A circle
3
B Circle
3
+ 1.2 µm
+ 1.2 µm
- 1.4 µm
- 1.4 µm
What’s the specification and performance?
-17
-12
-7
-2 -2
3
8
13
-17
-12
-7
-2
-7
3
-2
8
13
-7
Scanning Results (3D tests)
-12
ISO 10360-4
THN = 2.6 µm
Time = 70 secs
-12
-17
-17
C ½ Circle D ½ Circle
16
16
C ½ Circle
14
14
Sphere
Z
12
12
C½ Circle
10
+ 1.2 µm
10
8
- 1.4 µm
8
Sphere
6
6
D½ Circle
4
4
2
2
0
-17
Slide 20
-12
-7
-2
D ½ Circle
+ 1.2 µm
- 1.4 µm
0
3
8
13
-17
-12
-7
-2
3
8
13
Test conditions
CMM spec’n:
U3 =0.9+L(mm)/500mm
Controller / Head: UCC1 / PH10MQ
Ring Gauge:
Datum Ball:
50mm Grade AA, Form error 0.35µm
25mm Grade 5, roundness 0.08µm
Probe: SP600M
Styli: 50mm long x 6mm ball diameter
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Renishaw scanning - our offering
• The fastest and most accurate scanning
– passive scanning probes with dynamically
superior mechanisms
– sophisticated probe calibration
• The most flexible and productive
solution
– probe changing
– stylus changing
– articulation
• The lowest ownership costs
– innovative hardware and scanning
techniques reduce complexity
Slide 21
– robust designs and responsive service for
lower lifetime costs
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Responsive service and expert support
• Application and product support wherever you are
• Renishaw has offices in over 20 countries
• responsive service to keep you running
• optional advance RBE (repair by exchange) service on many products
• we ship a replacement on the day you call
• trouble-shooting and FAQs on www.renishaw.com/support
Service facility
at Renishaw
Inc, USA
Slide 22
apply innovation
SP600 family of
analogue scanning probes
Compact scanning probe with
rapid dynamic response for high
speed measurement
Slide 23
technology
apply innovation
SP600 family of
analogue scanning probes
Q. How do I compare SP600 against
competitor scanning offerings?
A. The following slides will help explain the
justification for choosing a SP600 probe...
Slide 24
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Active or passive sensors?
Passive sensors
Simplicity
• no motor
drives
• no locking
mechanism
• no tare system
• no
electromagnet
s
Active sensors
Complexity
• Drive motors
• 3 Dampers
• LVDTs mounted on
stacked axes
• no electronic
damping
• Design
– Active sensors are large, heavy and complex
Slide 25
– Passive sensors are small and relatively
simple
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Method of control
Passive sensors
• simple device
senses
deflection
• no powered
motion
• measurements
taken using
machine to
control stylus
deflection
• 3 axes under
servo control
Slide 26
Active sensors
Compact
passive
sensor
Complex
active
sensor
• effectively a
miniature CMM
• motors control
the deflection
to minimise the
force on the
stylus
• 6 axes under
servo control
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Sensor design and calibration
Passive sensors
Active sensors
• smaller axis
travels required
– at 300
mm/sec,
deflections can
be held within
a 100 µm
range*
Compact
passive
sensor
• stylus bending
compensated
by sophisticated
calibration
routine
Slide 27
* using adaptive scanning
Complex
active
sensor
• large probe
travel needed to
keep the contact
force steady
during scanning
• directiondependent
stylus bending
variations
minimised by
controlling the
contact force
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Dynamic response
Passive sensors
Active sensors
• Light weight
• Motorised stylus carrier
– high natural frequency
suspension system
Slide 28
Probe suspension must
respond whilst scan
vector is adjusted
– driven on internal servo
loop
Motors adjust stylus
position to keep contact
force within set limits
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Measurement performance
Passive sensors
Active sensors
• low inertia probe holds
surface at high speeds
• motorised probe
mechanism enables high
speed scanning
• fast discrete point
measurement cycles with
'extrapolate to zero'
routines
• no heat sources for
improved stability
– 500 mW power
consumption
– < 1ºC temperature change
inside probe
Slide 29
• slow discrete point
measurement cycles due
to the need to servo and
static average probe data
• heat sources: motors and
control circuits generate
heat
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Minimum inspection cycle times
High speed measurement
High speed scanning on a
large component
Slide 30
Scanning a complex surface
at high speed
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Minimum inspection cycle times
High speed measurement
Video commentary
• scanning probe
taking discrete
points at high speed
• ‘extrapolate to zero’
routines
• high speed
scanning
Slide 31
Rapid discrete point measurement and
scanning combined
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Robustness
Passive sensors
Active sensors
• no motors
• more things to go wrong
– position feedback system is
only electro-mechanical
element
• kinematic stylus changing
and Z over-travel bump
stop provides robust crash
protection
– probe will survive most
accidents
• simpler motion control
– motor drives
– locking mechanism
– tare system
– electromagnets
– electronic damping
– control hardware for the
above
• limited crash protection if
the stylus is deflected
beyond its limits
• more complex motion control
Slide 32
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Robustness
Crash protection
Video commentary
• overtravel in XY plane
• causes stylus module
to unseat
• stop signal generated
• stylus reseats as
machine backs off
surface
• probe still operational
Slide 33
Detachable styli allow stylus overtravel
without damage to the probe or
component
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Lifetime costs
Passive sensors
Active sensors
• lower purchase costs
• higher purchase costs
– simple and cost-effective
to purchase
• lower running costs
• higher running costs
– crash protection for
greater reliability
– complex sensor
– 50,000+ hours MTBF
– vendor technician needed to
remove damaged sensor
– advance replacement
service at discounted price
– customer-replacement on
site due to simple fittings
– less downtime
Slide 34
– complex and high cost
sensor
– cost-effective repair
– limited crash protection
– more downtime
– high repair charges
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SP600 family - key design characteristics
Passive sensor - no motors
• minimal heat source for greater stability
• no electro-mechanical wear
• reduced vibration during discrete point
measurement
Box spring mechanism
• unique design
• compact mechanism - fits inside Ø50
mm probe body
• low inertia
• rapid dynamic response
• low spring rates
Slide 35
• single 3D ferro-fluid damper
Parallel acting
springs
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SP600 family - key design characteristics
Z pos
Isolated optical metrology
Readheads
attached to
probe body
• readheads attached to probe
housing
• measures deflection of whole
mechanism, not just one axis
– eliminates inter-axis errors
– picks up thermal and
dynamic effects
• competitor probes with stacked
axes cannot measure inter-axis
errors directly
Slide 36
Inter-axis error
Y pos
X pos
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SP600 family - key design characteristics
Kinematic stylus changing

optimise stylus and hence
repeatability for each feature:
– minimum length
• Longer styli degrade repeatability
– maximum stiffness
– minimum joints
– maximum ball size
• Maximum effective working
length
• repeatable re-location
– no need for re-qualification
• passive
Slide 37
– no signal cables
Kinematic stylus changing in
around 10 seconds means that
you can pick the best stylus
for each feature
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SP600 family - key design characteristics
Long styli
Video commentary
• 200 mm (8 in) stylus
• scanning deep
features in a cylinder
block
• compact probe
dimensions further
extend the reach of
the probe
• styli up to 280 mm
(11.0 in) can be used
with SP600 probes
Slide 38
SP600 scanning with a 200 mm (8 in)
stylus for access to deep features
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SP600 family - key design characteristics
Crash protection
• stylus change joint has low
release force
– over-travel in XY causes stylus
to detach
• patented Z crash protection
– outer housing provides a ‘bump
stop’ to prevent probe
mechanism and readhead
damage
Slide 39
Stylus deforms in a severe Z
crash, whilst probe
mechanism is protected
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SP600 family - key design characteristics
Crash protection
Slide 40
Renishaw scanning probes are robust - even
after bending or breaking the stylus, they
still work!
Video commentary
• steel stylus crushed
against SP600
• more severe than any
Z crash since E Stop
would prevent
continued force
• bump-stop protection
system saves probe
mechanism
• probe was still
functional after test
completed
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SP600 family - key design characteristics
Circle C
Compression test data
Circle B
Stylus ball
shatters
Circle A
Force (N)
Circle D
1800
ISO 10360 Part 4
1600
1400
1200
1000
800
600
400
200
0
Slide 41
0
0.5
1
1.5
2
Deflection (mm)
2.5
3
3.5
Scan deflection = 0.5 mm
(All data in m)
Circle
Before
After
A
4.0
3.8
B
3.7
3.2
C
1.7
1.7
D
3.3
2.9
Result
4.0
3.8
apply innovation
Renishaw scanning - our offering
• The fastest and most accurate scanning
– passive scanning probes with dynamically
superior mechanisms
– sophisticated probe calibration
• The most flexible and productive
solution
– probe changing
– stylus changing
– articulation
• The lowest ownership costs
– innovative hardware and scanning
techniques reduce complexity
Slide 42
– robust designs and responsive service for
lower lifetime costs
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Questions?
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Slide 43