SP25M 3-axis system RENISHAW

SP25M

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The SP25M comprises two sensors in a single housing. Users can switch between a choice of four scanning modules (which can carry M3 styli with lengths from 20 mm to 400 mm) and an adaptor module that is compatible with Renishaw's TP20 range of probe modules. This capability enables scanning and touch-trigger probing in a single probe system.

The SP25M's compact size and autojoint mounting makes it compatible with the PH10M/MQ and PH6M probe heads. It can also be mounted on a multiwired extension bar. Together, these combinations permit excellent reach and access to part features.

For details of the technology in SP25M, refer to the SP25M Technical Paper.

World's smallest scanning probe at only 25 mm in diameter
Excellent metrology - isolated optical sensing and 3rd order polynomial compensation
Four modules provide optimal performance across a range of stylus lengths (up to 400 mm)
Two sensors in one - scanning and touch-trigger
Crash protection and simple stylus changing
Fast and simple probe calibration cycle
Ideal for profile and form measurement
Suitable for use on motorised indexing heads for greater flexibility and shorter scanning cycle times
Simple and robust design for greater reliability - no motors or locking mechanisms

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SP25M specification

Mounting	Renishaw autojoint : PH10M, PH10MQ or PH6M May be mounted on autojoint extension bars
Suitable interface	Either: UCC controller Or: AC3 PC interface card for machines not fitted with the UCC controller
Probe attributes	3-axis analogue measurement (X, Y, Z) Pivoting motion in XY plane with translation in Z direction For SM25-5: Plane translation in all 3 axes XYZ
Measurement range	±0.5 mm (±0.02 in) in X, Y and Z For SM25-5: ±0.3 mm
Overtravel range	±2.0 mm (±0.08 in) in X and Y 1.7 mm (0.07 in) in +Z 1.2 mm (0.07 in) in –Z For SM25-5: ±X, ±Y = 0.95 mm (0.037 in) +Z = 1.0 mm (0.039 in) -Z = 1.1 mm (0.043 in)
Crash protection:	X, Y, –Z - break-off of either module or stylus holder +Z - integral bump-stop design
Resolution	< 0.1 µm (0.000004 in) with either UCC2 daughtercard or AC3 interface card
Spring rate	0.2 N/mm to 0.6 N/mm nominal dependent on stylus length
Damping	Single viscous fluid damper For SM25-5: Two viscous fluid dampers
Power supply	+12 V (±5%), –12 V (+10% / –8%), +5 V (+10% / –13%) DC at probe
Outputs (X,Y,Z)	Non-linear and non-orthogonal analogue outputs - rate, gain and resolution are not fixed SP25M requires that a non-linear, third-order polynomial calibration method is used.
Stylus range	M3

SP25M modules and stylus holders

A range of module kits allows SP25M users to build up their probing capability over time.

Each SM25-# scanning module is optimised in terms of gain and spring rate to suit the range of stylus lengths specified. For every module, there is a matching SH25-# stylus holder.

The SH25-3 and SH25-4 stylus holders are constructed with a fixed carbon fibre stem to which an M3 stylus is mounted, selected to provide the correct working length.

Whilst the SP25M can carry cranked (non straight) styli configurations when using SM25-1/2/3/4 scanning modules and the original standard stylus holders (SH25-1/2/3/4) but for optimum metrology where larger offsets are required Renishaw recommends the new SH25-2A/3A/4A range of stylus holder, specifically designed to meet the challenges posed by such stylus arrangements.

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FCR25 flexible changing racks

A range of FCR25 module changing systems, each of which allows any of the SP25M system elements to be stored in each port.

SM25 scanning modules and the TM25-20 TTP module adaptor can be docked directly into the FCR25 ports
SH25 scanning stylus holders require a PA25-SH adaptor
TP20 modules can be stored with the help of a PA25-20 adaptor

FCR25	FCR25-L3	FCR25-L6	FCR25 port adaptor insert kit

Triple port unit suitable for fitment to the MRS modular rack system.	3-port stand-alone unit for smaller CMMs and optical CMMs.	6-port stand-alone unit for smaller CMMs and optical CMMs.	PA25-SH and PA25-20 inserts to store SH25-# stylus holders or TP20 probe modules

AC3 interface card

The AC3 interface card is designed for use where a PC or OEM Controller (ISA Bus) provides control of the CMM system. The card performs probe management functions.