20
Calibrating a system
Calibration should be done in the following
circumstances:
• Before the system is used.
• When a new stylus is used.
• To allow for machine thermal growth.
• Poor relocation repeatability of the probe
holder.
It is important that calibration cycles are run at the
measuring cycle feedrate to cancel out system
errors.
Make measurements in every measuring direction
to provide complete calibration data for the
measuring cycles.
Probe interface signals
1. Error signal delay
A delay of 48 ms maximum for the OMM + MI 12
or 41 ms maximum for the OMI, will elapse
between an error occurring and the output
indicating error.
2. Probe signal delay
There is a nominal delay of 240 µs with a
repeatability of 3 µs for each interface, from the
time the probe actually operates, to the MI 12/OMI
interface outputting a probe change of state.
Enabling the enhanced trigger circuit will add a
further nominal 10 ms.
Probing cycles are available from Renishaw
X/Y
Z
X/Y
Probe moves
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