TP20 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 ‘spurious triggers').

To allow the TP20 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 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)
• Extended force (EF) probe module (brown 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)