Renishaw SP25M Bedienungsanleitung Seite 47

SP25M user's guide
http://www.renishaw.com
SP25M cranked stylus carrying capability for typical stylus
combinations
As well as straight styli, SP25M has the ability to carry cranked styli when using the standard range of SM25 scanning modules. For
optimum metrology and when larger offsets are required, it is recommended that the SH25-3A, SH25-4A and SH25-5A modules are used.
For SH25-1, SH25-2 and SH25-2A it is mandatory that a 20 mm or longer stylus extension is used between the SH25 stylus holder and the
crank centre to give the correct crank down distance from the stylus holder to the crank centre.
When using SH25-3, SH25-4, SH25-3A and SH25-4A, the crank centre may either be mounted directly to the stylus holder or to a stylus
extension between the stylus holder and the crank centre.
For SM25-1, SM25-2, SM25-3 and SM25-4, a straight downward pointing stylus can be added to the crank centre to continue the projection
down from the stylus holder. This is providing that the maximum overall stylus length and mass does not exceed the recommended limits for
the particular module being used.
For 3D scanning with SM25-1 and SM25-2, the maximum crank out distance is 28 mm and is measured from the cranked (non straight)
stylus tip to the centre of the crank centre. For 3D scanning with SM25-3 and SM25-4, the maximum crank out distance is 58 mm.
Multiple cranked styli may be used providing the overall mass of the crank centre and stylus does not exceed the recommended limits for
the particular module being used.
Please refer to the Renishaw stylus catalogue for the full range of cranked and star stylus configurations available. It is recommended that a
one piece star stylus is used whenever possible to minimise the mass of the assembly. Greater flexibility is offered however by configuring
a crank centre with one or more cranked styli.
Module 'Crank down' distance
/ stylus using an extension*
holder between the stylus
holder and the crank
centre
SM25-1 25 mm**
/
SH25-1
SM25-1 55 mm**
/
SH25-1
SM25-2 55 mm
/
SH25-2
SM25-2 85 mm
/
SH25-2
Issued 10 2015
3D scanning 2D scanning and
Maximum 'crank point taking
out' distance Maximum 'crank
when measured out' distance
to tip of crank when measured
(star) stylus to tip of crank
(star) stylus
28 mm** 58 mm**
28 mm** 58 mm**
28 mm 83 mm
28 mm 83 mm
Maximum 'down' Maximum
stylus (same as permissible
'effective stylus mass of crank
reach' - see (star) centre
straight styli) plus all styli
50 mm 9 g***
50 mm 9 g****
105 mm 6 g***
105 mm 7 g****
Maximum
operating stylus
tip deflection for
above in any
orientation
0.4 mm
0.4 mm
0.4 mm
0.4 mm
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