OMP40-2 installation guide
2.4
OMP40-2 basics
Enhanced trigger filter
Probes subjected to high levels of vibration or shock loads may output probe trigger signals without
having contacted any surface. The enhanced trigger filter improves the probe’s resistance to these
effects.
When the filter is enabled, a constant nominal 10ms delay is introduced to the probe output.
It may be necessary to reduce the probe approach speed to allow for the increased stylus overtravel
during the extended time delay.
The enhanced trigger filter is factory set to OFF.
Optical transmission method
Probes subjected to particular forms of light interference may accept spurious start signals.
The OMP40-2 can be operated in either ‘Modulated’ or ‘Legacy’ optical transmission mode.
Modulated mode
The OMP40-2 becomes compatible for use with the OMM-2 or OMM-2C receiver with OSI or OSI-D
interface or with an OMI-2 / OMI-2T / OMI-2H / OMI-2C receiver / interface to provide substantially
increased resistance to light interference.
Modulated transmission in the OMP40-2, is capable of providing three different coded start signals.
This allows the use of two probes with an OMI-2T receiver / interface and up to three probes with an
OMM-2 receiver with a OSI or OSI-D interface respectively.
Twin / multiple probe system
To operate in a twin or multiple probe system, one probe must be set to PROBE 1 start and the other
probe must be set to PROBE2 start (OMI-2T or OMM-2 with OSI or OSI-D) or PROBE3 start (OMM-2
with OSI or OSI-D only). These settings are user configurable.
In a twin probe system, such as a spindle probe and an optical tool setting probe, the spindle probe
must be set to PROBE 1 start and the tool setter to PROBE 2 start.
In a multiple probe system, with two spindle probes and one optical tool setting probe, the two spindle
probes must be set to PROBE 1 and PROBE 2 start, respectively, and the tool setter must be set to
PROBE 3 start.
Legacy mode
A start filter improves the probe’s resistance to light interference.
When ‘Legacy’ (start filter on) is enabled, an additional one second delay is introduced to the probe
activation (switch on) time.
It may be necessary to revise the probe program software to allow for the increased activation time.
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