Renishaw PH20 - TP20 stylus modules; The probe modules; Trigger force options; The low force probe module

TP20stylusmodules
Theprobemodules
Each probe module, which houses the kinematic switching touch sensor mechanism, carries the stylus
assembly and provides overtravel in the X, Y and +Z axes (–Z is offered when using the TP20 6-way probe
module). Incorporating an M2 stylus mounting, each probe module is compatible with Renishaw’s
comprehensive range of M2 styli.
Designed to minimise the possibility of probe module misalignment generating a probe ‘seated’ signal, the
probe module is held in position by a magnetically retained, highly repeatable kinematic coupling. Electrical
contact pins conduct the probe sense voltage through the coupling.
Triggerforceoptions
The standard force probe module is suitable for most
applications (when used with the recommended stylus range),
but sometimes the effects of stylus length and mass,
combined with machine acceleration
and vibration, can cause the probe to false trigger (these are
referred to as ‘false triggers’).
To allow the PH20 to be used on co-ordinate measuring
machines where acceleration forces or vibration would
otherwise result in spurious triggers, a choice of higher force
probe modules is available. A low force probe module is also
available for measurement of delicate materials. Refer to the
applications guide later in this document for information on
how to select the correct probe module for your application.
The extended force module is not suitable for use with the
PH20 system.
The type of probe modules supplied with your probe will be
clearly marked on each probe module’s front ring. The probe
modules also carry a colour-coded front cap as follows:
 Low force (LF) probe module (green cap)
 Standard force (SF) probe module (black cap)
 Medium force (MF) probe module (grey cap)
 6-way (6W) probe module (blue cap)
 Extension module 1 standard force (EM1 STD) (black cap)
 Extension module 2 standard force (EM2 STD) (black cap)
TP20modulekits
The following TP20 probe module kits are available from your supplier for use with PH20:
TP20 probe module kit (probe module only) Part number
Low force probe module A-1371-0392
Standard force probe module A-1371-0270
Medium force probe module A-1371-0271
6-way probe module A-1371-0419
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