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Switch on / switch off
Switch on / switch off method
The OMI-2H operates using only optical on / optical off as the switch on / switch off method.
Optical on / optical off is available with all Renishaw's OMP range of spindle probes and the optical tool
setter (OTS). Time out, spin on / spin off and shank on / shank off options are not compatible with the
2.7
OMI-2H.
Start up times
In normal operation the start up time for modulated probes is 410 ms max. for kinematic probes. For
strain gauge probes the start up time is 1 sec max.
The turn off time is 0 seconds.
Normal operation refers to when the on / off status of the probes is in synchronisation with the receiver
on / off status. The active probe should correspond to the respective active system LED.
When changing from Probe 1 to Probe 2, or Probe 2 to Probe 1, allow 1 second between the
cancelling of one machine start input and raising of the other start input, also allow 1 second when
turning the probe off and back on again.
Synchronisation recovery
Under abnormal operating situations the system may lose synchronisation between the receiver and
probes. An internal synchronisation recovery will be initiated when the next machine input is received.
The maximum time for system recovery from an abnormal operating situation is 3.5 seconds. Such a
time delay could cause a machine alarm if controllers require ready signals within a time of less than
3.5 seconds.
NOTE: When used in conjunction with an OMP400 or OMP600, ensure the probe is set to the
standard switch-on delay.
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