Modes Of Operation - Renishaw SP600 Installation And User Manual

SP600 installation and user's guide
www.renishaw.com
Using the SP600, SP600M and SP600Q
Qualification
The SP600M family of probes require qualification before they are able to give accurate positional data. Renishaw has extensive
experience of scanning, and offers support and advice on scanning algorithms and control software. Please contact your local Renishaw
subsidiary for further information.

Modes of operation

The SP600M is an analogue output measurement probe and may be used in a variety of ways. Principally, these will be as either a single
point measurement or a profile measurement/digitising probe.
Scanning mode
SP600 can be used as a continuous deflection analogue contact scanning probe for profile measurement or for surface digitising
purposes. In this case the CMM controller must respond to the deflections of the probe in real time to maintain surface contact, i.e. 6 axes
must be controlled simultaneously.
Single point measurement mode: Extrapolate to zero method
Data is acquired whilst in contact and moving normal to the surface, either on the way in or whilst backing off. This is extrapolated to the
zero surface position. It has the advantage that the measurement takes place at zero force, minimising the deflection on probe, stylus and
CMM, and additionally that the probe does not need calibration.
Static point measurement mode: Static averaging method.
SP600 can be used to take single points to give increased accuracy whilst reducing the effects of machine vibration by performing static
averaging.
The probe's stylus should be made to contact the workpiece and deflect the stylus to the recommended amount (50 microns). The CMM
should be halted and kept nominally stationary.
Whilst the machine is stationary surface position readings should be taken which are then averaged to give one single surface point. The
longer the system is kept stationary, the more readings can be gathered, to give a more accurate result and to average out the effect of
machine vibration.
Issued 01 2018
51