Renishaw OMP400 User manual

OMP400 optical machine probe systems
Installation guide
H-5069-8504-05-B

Renishaw part no: H-5069-8504-05-B
First issued: 01.2008
Revised: 09.2022
© 2008 - 2022 Renishaw plc. All rights reserved.
This document may not be copied or reproduced in whole or in part, or transferred to any other media
or language, by any means, without the prior written permission of Renishaw plc.
Renishaw plc. Registered in England and Wales. Company no: 1106260. Registered office: New Mills,
Wotton-under-Edge, Gloucestershire, GL12 8JR, UK.
Compliance information for this product is available by scanning the QR code or visiting
www.renishaw.com/mtpdoc

i
Contents
Before you begin
Disclaimer .................................................................1.1
Trademarks ................................................................1.1
Warranty ..................................................................1.1
Changes to equipment .......................................................1.2
CNC machines .............................................................1.2
Care of the probe ...........................................................1.2
Patents ...................................................................1.2
Safety ....................................................................1.3
OMP400 basics
Introduction ................................................................2.1
Optical transmission method...................................................2.2
Legacy mode ............................................................2.2
Modulated mode .........................................................2.2
Twin probe system...........................................................2.2
Trigger Logic™ .............................................................2.2
Modes of operation ..........................................................2.3
Configurable settings.........................................................2.3
Switch-on delay ..........................................................2.3
Switch-on / switch off methods...............................................2.4
Enhanced trigger filter .....................................................2.4
Auto-reset facility .........................................................2.5
Optical transmission method and probe identity .................................2.5
Optical power ...........................................................2.5
OMP400 dimensions.........................................................2.6
OMP400 specification ........................................................2.7
Recommended styli..........................................................2.8

OMP400 installation guide
ii
Contents
System installation
Installing the OMP400 with an OMI-2T / OMI-2 / OMI-2H / OMI ........................3.1
Performance envelope with an OMI-2T / OMI-2H / OMI-2 (modulated transmission) .....3.2
Performance envelope when using the OMP400 with the OMI (legacy transmission).....3.3
Installing the OMP400 with an OMM and MI 12 ....................................3.4
Performance envelope with an OMM (legacy transmission) ........................3.5
Preparing the OMP400 for use .................................................3.6
Fitting the stylus ..........................................................3.6
Installing the batteries .....................................................3.7
Mounting the probe on a shank (or machine table) ...............................3.8
Stylus on-centre adjustment.................................................3.9
Calibrating the OMP400 .....................................................3.10
Why calibrate a probe? ...................................................3.10
Calibrating in a bored hole or on a turned diameter..............................3.10
Calibrating in a ring gauge or on a datum sphere ...............................3.10
Calibrating the probe length ................................................3.11
Trigger Logic™
Reviewing the current probe settings ............................................4.1
Probe settings record ........................................................4.2
Changing the probe settings ...................................................4.3
Changing the probe settings (continued) .........................................4.4
Operating mode.............................................................4.5
Maintenance
Maintenance ...............................................................5.1
Cleaning the probe ..........................................................5.1
Changing the batteries .......................................................5.2
Fault finding
Parts list

1.1
Disclaimer
WHILE CONSIDERABLE EFFORT WAS MADE TO VERIFY THE ACCURACY OF THIS DOCUMENT
AT PUBLICATION, ALL WARRANTIES, CONDITIONS, REPRESENTATIONS AND LIABILITY,
HOWSOEVER ARISING, ARE EXCLUDED TO THE EXTENT PERMITTED BY LAW.
RENISHAW RESERVES THE RIGHT TO MAKE CHANGES TO THIS DOCUMENT AND TO THE
EQUIPMENT, AND/OR SOFTWARE AND THE SPECIFICATION DESCRIBED HEREIN WITHOUT
OBLIGATION TO PROVIDE NOTICE OF SUCH CHANGES.
Trademarks
RENISHAW® and the probe symbol are registered trade marks of Renishaw plc. Renishaw
product names, designations and the mark ‘apply innovation’ are trade marks of Renishaw plc or its
subsidiaries.
Google Play and the Google Play logo are trademarks of Google LLC.
Apple and the Apple logo are trademarks of Apple Inc., registered in the U.S. and other countries.
AppStore is a service mark of Apple Inc.,registered in the U.S. and other countries.
Other brand, product or company names are trade marks of their respective owners.
Warranty
Unless you and Renishaw have agreed and signed a separate written agreement, the equipment
and/or software are sold subject to the Renishaw Standard Terms and Conditions supplied with such
equipment and/or software, or available on request from your local Renishaw office.
Renishaw warrants its equipment and software for a limited period (as set out in the Standard Terms
and Conditions), provided that they are installed and used exactly as defined in associated Renishaw
documentation. You should consult these Standard Terms and Conditions to find out the full details of
your warranty.
Equipment and/or software purchased by you from a third-party supplier is subject to separate terms
and conditions supplied with such equipment and/or software. You should contact your third-party
supplier for details.
Before you begin

OMP400 installation guide
1.2
Before you begin
Changes to equipment
Renishaw reserves the right to change equipment specifications without notice.
CN 101142461
CN 101171493
CN 101198836
EP 1457786
EP 1866602
EP 1880163
EP 1893937
EP 2154471
IN 305341
IN 307453
IN 364693
JP 5283501
JP 530811
JP 5357541
JP 5611297
US 6860026
US 7285935
US 7486195
US 7603789
US 7689379
US 7792654
US 8140287
Intended use
The OMP400 is a optical spindle probe that enables automated workpiece inspection and job set-up
on multi-tasking machines and machining centres.
CNC machines
CNC machine tools must always be operated by fully trained personnel in accordance with the
manufacturer's instructions.
Care of the probe
Keep system components clean and treat the probe as a precision tool.
Patents
Features of the OMP400 probe, and other similar Renishaw probes, are subject of one or more of the
following patents and / or patent applications:

1.3
Before you begin
Safety
Information to the user
This product is supplied with non-rechargeable lithium metal batteries. Refer to the battery
manufacturer’s literature for specific battery operating, safety and disposal guidelines.
• Do not attempt to recharge the batteries.
• Replace the batteries only with the specified type.
• Do not mix new and used batteries in the product.
• Do not mix different types or brands of batteries in the product.
• Ensure that all batteries are inserted with the correct polarity in accordance with the instructions in
this manual and indicated on the product.
• Do not store the batteries in direct sunlight.
• Do not expose the batteries to water.
• Do not expose the batteries to heat or dispose of the batteries in a fire.
• Avoid forced discharge of the batteries.
• Do not short circuit the batteries.
• Do not disassemble, apply excessive pressure, pierce, deform or subject the batteries to impact
• Do not swallow the batteries
• Keep the batteries out of the reach of children.
• If the batteries are swollen or damaged do not use them in the product and exercise caution when
handling them.
• Dispose of waste batteries in accordance with your local environmental and safety laws.
Ensure that you comply with international and national battery transport regulations when transporting
the batteries or this product with the batteries inserted.
Lithium metal batteries are classified as dangerous goods for transportation and require labelling and
packaging in accordance with the dangerous goods regulations before being offered for transportation.
To reduce the risk of shipment delays, should you need to return this product to Renishaw for any
reason, do not return any batteries.
Information to the machine supplier/ installer
It is the machine supplier's responsibility to ensure that the user is made aware of any hazards
involved in operation, including those mentioned in Renishaw product literature, and to ensure that
adequate guards and safety interlocks are provided.
Under certain circumstances, the probe signal may falsely indicate a probe seated condition. Do not
rely on probe signals to halt the movement of the machine.

OMP400 installation guide
1.4
Before you begin
Information to the equipment installer
All Renishaw equipment is designed to comply with the relevant EC and FCC regulatory requirements.
It is the responsibility of the equipment installer to ensure that the following guidelines are adhered to,
in order for the product to function in accordance with these regulations:
• any interface MUST be installed in a position away from any potential sources of electrical noise,
i.e. power transformers, servo drives etc;
• all 0 V/ground connections should be connected to the machine 'star point' (the 'star point' is a
single point return for all equipment ground and screen cables). This is very important and failure to
adhere to this can cause a potential difference between grounds;
• all screens must be connected as outlined in the user instructions;
• cables must not be routed alongside high current sources, i.e. motor power supply cables etc, or be
near high speed data lines;
• cable lengths should always be kept to a minimum.
Equipment operation
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the
equipment may be impaired.
Optical safety
This product contains LEDs that emit both visible and invisible light.
OMM-2C is ranked Risk Group: Exempt (safe by design).
The product was evaluated and classified using the following standard:
BS EN 62471:2008 The photobiological safety of lamps and lamp systems.
Renishaw recommends that you do not stare at or look directly into any LED device, irrespective of its
risk classification.

2.12.1
Introduction
Welcome to the OMP400, Renishaw's ultra compact probe for small to medium machining centres that
sets new standards for reliability and robustness in the harshest of machine tool environments.
Successfully combining the miniaturisation of the popular OMP40 with the high accuracy of the
MP700, the OMP400 provides existing probe users with a simple upgrade to solid-state strain gauge
technology and all the associated benefits this brings:
• excellent 3D performance to allow probing of contoured surfaces;
• improved repeatability in all probing directions;
• low pre-travel variation to provide high accuracy, even when used with long styli;
• a proven ten-fold improvement in life (10 million triggers);
• the elimination of reseat failures;
• high resistance to machine tool vibration;
• a 360° optical ‘switch-on’ facility, allowing the probe to be turned on / reset in any position;
• resistance to shock and false triggering through the use of digital filtering;
• full compatibility with Renishaw’s industry proven optical transmission systems.
In addition to providing high accuracy measurement on your machine tool, the OMP400 also offers:
• Faster calibration:
On complex 3D parts, it is common to measure in several different directions. Each direction
of a standard mechanical probe must be calibrated to ensure that the pre-travel variation is
compensated in the measurement. Performing this calibration for every 3D direction can be
time-consuming.
The OMP400 has almost no pre-travel variation, so a single calibration value may be used for any
probing angle in 2D or 3D. This results in a vastly reduced calibration time. An additional benefit is a
corresponding reduction in errors introduced by environmental changes within the machine during
a long calibration cycle.
OMP400 basics

OMP400 installation guide
2.2
OMP400 basics
Optical transmission method
The OMP400 can be operated in either legacy or modulated mode. The modulated mode has a
higher resistance to light interference. Certain forms of light interference can cause false triggers or
mimic a start signal and falsely activate the probe. These effects are much reduced when modulated
transmission is selected.
Legacy mode
When set to legacy mode, the probe will only function with an OMI or OMM / MI 12.
If start problems are experienced in legacy mode, activate the Legacy Start Filter ON option. This
introduces a 1 second delay to the probe switch on time, and improves the probe's resistance to false
starts caused by light interference.
NOTE: The probing program on the machine will need to take account of this delay.
Modulated mode
When set to modulated mode, the probe will only function with an OMI-2, OMI-2T OMI-2H or
OMI-2C interface.
Modulated transmission is capable of providing two different coded start signals. This allows the use of
two probes with one interface. Twin probe installations require an OMI-2T interface.
Twin probe system
To operate a twin probe system, one probe needs to be set to PROBE 1 start and the other set to
PROBE 2 start. These settings are user configurable.
In a twin probe system, such as a spindle probe and an optical tool setting probe, the spindle probe
would be set to PROBE 1 start and the tool setter to PROBE 2 start.
NOTE: When used in conjunction with an OMI-2T, the OMP400 switch on method must be set to
optical on (standard).
Trigger Logic™
Trigger Logic™ (see Section 4 - Trigger Logic™) is a method that allows the user to view and select
all available mode settings in order to customise a probe to suit a specific application. Trigger Logic™
is activated by battery insertion and uses a sequence of stylus deflection (triggering) to systematically
lead the user through the available choices to allow selection of the required mode options.
A Probe Setup app is available that simplifies this process with clear, interactive instructions and
informative videos and is available for download on the App Store and Google Play.

2.3
OMP400 basics
or
Current probe settings can be reviewed by simply removing the batteries for a minimum of 5seconds,
and then replacing them to activate the Trigger Logic™ review sequence
Modes of operation
The OMP400 probe can be in one of three modes.
Stand-by mode: where the probe is awaiting a switch-on signal;
Operational mode: activated by one of the switch-on methods described later in this section. In this
mode the OMP400 is ready for use.
Configuration mode: where Trigger Logic™ may be used to configure the following probe settings.
Configurable settings
Switch-on delay
When the standard switch-on is selected, the probe will be operational in less than 0.8 seconds. After
being switched on, the OMP400 must remain operational for a minimum of 1 second before being
switched off.
A second switch-on mode is available where a 3 second delay is invoked after the probe start signal
is received. This feature is aimed at machines where 'Auto-start' is required, i.e. it will ensure that
when the probe receives a start signal during a tool change, it will switch-on correctly in the spindle.
To ensure that the probe activates correctly, it is important to make sure that it is stationary when it is
switched on. If the probe is not stationary during a start sequence, there is a possibility that the strain
gauges could auto-zero in the incorrect position and produce a permanently triggered output. The
3 second delay ensures that the start sequence only occurs when the probe is safely located in the
machine spindle (this assumes that the tool change process is completed in less than 3 seconds).
NOTES:
The probing program on the machine will need to take account of this delay.
When used in conjunction with an OMI-2T, the OMP400 switch on method must be set to optical on
(standard).

OMP400 installation guide
2.4
OMP400 basics
Switch-on / switch off methods
The following switch-on / switch-off options are user-configurable.
1. Optical on / Optical off.
2. Optical on / Timer off.
NOTE: A visual indication of currently selected probe settings is provided, on battery insertion, by the
three multicoloured LEDs located within the probe's window (see Section 4 - Trigger Logic™).
Enhanced trigger filter
Probes subjected to high levels of vibration or shock loads may output 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 8 or 16 ms delay is introduced to the probe's output. The probe
is factory set to 8 ms. If false triggering is noticed then consider increasing the filter delay to 16 ms.
NOTES:
It may be necessary to reduce the probe's approach speed to allow for increased stylus overtravel
during the extended time delay.
Whilst there is also a 0 ms setting, this is for Renishaw's use only. Renishaw does not recommend that
you use this setting as false triggering is likely to occur.
OMP400 switch-on
method
OMP400 switch-off method
Switch-off options are configurable
Switch-on time
Optical on
Optical switch-on
is commanded by
machine input.
Optical off
Optical switch-off is commanded by
machine input.
A timer automatically switches the probe
off after 90 minutes from last trigger if not
turned off by machine input.
Timer off (time out)
Time out will occur (12, 33 or 134 seconds
- user congurable) after the last probe
trigger or reseat.
Legacy lter off:
Legacy lter on:
Modulated
0.8 seconds
1.6 seconds
0.7 seconds.
Optical on (3 second
delay)
Optical switch-on
is commanded by
machine input.
Timer off (time out)
Time out will occur (12, 33 or 134 seconds
- user congurable) after the last probe
trigger or reseat.
3 seconds.
NOTE: After being switched on, the OMP400 must be on for 1 second before being switched off.

2.5
OMP400 basics
Auto-reset facility
The Auto-reset function in the OMP400 compensates for stylus forces, due to high accelerations and
changes in probe orientation, that can cause the probe to trigger when using long styli (>100 mm).
This feature is suitable for radial rotations (e.g. vertical to horizontal). It is selectable using Trigger
Logic™.
NOTE: The Auto-reset function cannot compensate for rotations around the probe's axis when
horizontal with long styli (>100 mm). A manual reset will be required in this situation.
When a manual reset is required, the method used will depend on the probe's switch-off setting:
• In optical off mode, the probe must be switched off then on again.
• In timer off mode, the probe must be switched on using an M code start signal.
Optical transmission method and probe identity
The OMP400 can be operated in either legacy or modulated mode. The modulated mode has a
higher resistance to light interference. Certain forms of light interference can cause false triggers or
mimic a start signal and falsely activate the probe. These effects are much reduced when modulated
transmission is selected.
Legacy mode
When set to legacy mode, the probe will only function with an OMI or OMM / MI 12.
If start problems are experienced in legacy mode, activate the Legacy Start Filter ON option. This
introduces a 1 second delay to the probe switch on time, and improves the probe's resistance to false
starts caused by light interference.
NOTE: The probing program on the machine will need to take account of this delay.
Modulated mode
When set to modulated mode, the probe will only function with an OMI-2, OMI-2T OMI-2H or
OMI-2C interface.
For most applications, the spindle probe should be set to PROBE 1 start.
PROBE 2 start should only be selected for a secondary spindle probe in a twin probe application.
Optical power
Where the separation between the OMP400 and the receiver is small (no more than 2 m), the low
optical power setting may be selected. This setting reduces the optical transmission range and extends
battery life.

OMP400 installation guide
2.6
OMP400 basics
OMP400 dimensions
Stylus overtravel limits
Stylus length ±X/±Y Z
50 (1.97) 12 (0.47) 6 (0.24)
100 (3.94) 22 (0.87) 6 (0.24)
UK
50 (1.97)
Dimensions given in mm (in)
19 (0.75)
11°
11°
50 (1.97)
Ø40
(1.57)

2.7
OMP400 basics
OMP400 specification
Principal application Small to medium machining centres and mould and die applications
Dimensions Length
Diameter
50 mm (1.97 in)
40 mm (1.57 in)
Weight (without shank) With batteries
Without batteries
262 g (9.24 oz)
242 g (8.53 oz)
Transmission type 360° infra-red optical transmission
Switch-on methods Machine M code or Auto-start
Switch-off methods Machine M code or timer
Operating range Up to 5 m (16.4 ft)
Receiver/interface OMI-2T, OMI-2, OMI-2H, OMI-2C, OMI or OMM / MI 12
Sense directions Omni-directional ±X, ±Y, +Z
Repeatability 0.25 µm (10 µin) 2 sigma – 50 mm stylus length*
0.35 µm (14 µin) 2 sigma – 100 mm stylus length
X,Y (2D) form
measurement deviation
±0.25 µm (10 µin) – 50 mm stylus length*
±0.25 µm (10 µin) – 100 mm stylus length
X,Y, Z (3D) form
measurement deviation
±1.00 µm (40 µin) – 50 mm stylus length*
±1.75 µm (70 µin) – 100 mm stylus length
Stylus trigger force
XY plane
+ Z direction
0.06 N, 6 gf (0.22 ozf) typical minimum
2.55 N, 260 gf (9.17 ozf) typical minimum
The stylus trigger force is the
force exerted on the component
when the probe triggers. However,
the maximum force applied to
the component will occur after
the trigger point and will be
greater than the trigger force. The
magnitude depends on a number
of factors affecting probe overtravel
including measuring speed and
machine deceleration. If the
forces applied to the component
are critical, contact Renishaw for
further information.
Stylus overtravel force
XY plane
+ Z direction
1.04 N, 106 gf (3.74 ozf) typical minimum §
5.5 N, 561 gf (19.78 ozf) typical minimum †
Stylus overtravel XY plane
+Z plane
±11°
6 mm (0.23 in)
* Performance specication is for a test velocity of 240 mm/min (9.45 in/min) with a 50 mm carbon bre stylus. Test velocity does not constrain performance in application.
§ Stylus overtravel force in XY plane occurs 70 µm after the trigger point and rises by 0.1 N/mm, 10 gf/mm (9.1 oz/in) until the machine tool stops (in the high force
direction and using a 50 mm carbon bre stylus).
† Stylus overtravel force in + Z direction occurs 10 µm to 11 µm after the trigger point and rises by 1.2 N/mm, 122 gf/mm (109.6 oz/in) until the machine tool stops.

OMP400 installation guide
2.8
OMP400 basics
A
D
C
B
Recommended styli
High modulus carbon fibre styli are designed to minimise pre-travel and improve accuracy, as the
stem material is extremely stiff. This inherent stiffness makes the following styli most suitable for strain
gauge applications.
Part number A-5003-7306
Carbon fibre
A-5003-6510
Carbon fibre
A-5003-6511
Carbon fibre
A-5003-6512
Carbon fibre
ABall diameter mm (inch) 6.0 (0.24) 6.0 (0.24) 6.0 (0.24) 6.0 (0.24)
BLength mm (inch) 50.0 (1.97) 100.0 (3.94) 150.0 (5.91) 200.0 (7.88)
CStem diameter mm (inch) 4.5 (0.18) 4.5 (0.18) 4.5 (0.18) 4.5 (0.18)
DEWL mm (inch) 38.5 (1.52) 88.5 (3.48) 138.5 (5.45) 188.5 (7.42)
Mass (grammes) 4.1 6.2 7.5 8.7
LEGACY optical transmission mode
Stand-by life
(typical)
5% usage = 72 minutes/day
(days-typical)
Continuous use
(hours-typical)
Standard power
mode
Low power
mode
Standard power
mode
Low power
mode
Standard power
mode
Low power
mode
One year One year 75 90 95 110
MODULATED optical transmission mode
Stand-by life
(typical)
5% usage = 72 minutes/day
(days-typical)
Continuous use
(hours-typical)
Standard power
mode
Low power
mode
Standard power
mode
Low power
mode
Standard power
mode
Low power
mode
One year One year 70 85 85 105
Environment IP rating IPX8, BS EN 60529:1992+A2:2013
Storage temperature −10 °C to +70 °C (+14 °F to +158 °F)
Operating temperature +5 °C to +50 °C (+41 °F to +122 °F)
Battery types 2 x 1/2 AA (3.6 V) Lithium Thionyl Chloride
Battery reserve life Approximately one week after a low battery warning is first given.
Typical battery life See table below.

3.1
System installation
Installing the OMP400 with an OMI-2T / OMI-2 / OMI-2H / OMI
The probe and OMI-2T / OMI-2H / OMI-2 / OMI diodes must be in the others field of view or line of
site, and within the performance envelope shown. The OMP400 performance envelope is based on the
receiver being at 0°, and vice-versa.
Natural reflective surfaces within the machine may change the signal transmission range.
Coolant residue accumulating on the OMP400 or receiver windows will have a detrimental effect on
transmission performance. Wipe clean as often as is necessary to maintain unrestricted transmission.
Operation in temperatures of 0 °C to 5 °C or 50 °C to 60 °C (32 °F to 41 °F or 122 °F to 140 °F) will
result in some reduction in range.
CAUTION: If two systems are operating in close proximity to each other, take care to ensure that
signals transmitted from the OMP400 on one machine are not received by the receiver on the other
machine, and vice versa. When this is the case, use of the probe’s low power mode or receiver's low
range setting.
TM
TM
CNC machining centre spindle
Mounting bracket
OMI-2T / OMI-2H / OMI-2 / OMI
Power supply
(optional)
CNC
machine
control
Tool setting probe, only with OMI-2T / OMI-2H
Workpiece
Cable
Stylus
OMP400
inspection
probe

OMP400 installation guide
3.2
System installation
Performance envelope with an OMI-2T / OMI-2H / OMI-2 (modulated transmission)
OMP400
OMI-2T /
OMI-2H /
OMI-2
0°
Optical
centre line
60°
45°
45°
15°
30°
30°
15°
60°
0°
60°
45°
45°
15°
30°
30°
15°
60°
75°
4 (13.1)
3 (9.8)
2 (6.5)
1
(3.3)
5 (16.4)
4 (13.1)
3 (9.8)
2 (6.5)
1
(3.3)
5 (16.4)
75°
75°
75°
Typical plot at 20 °C (68 °F)
360° transmission around
probe axis in metres (feet)
Switch on/off
Operating - standard power mode
Operating - low power mode

3.3
System installation
Performance envelope when using the OMP400 with the OMI (legacy transmission)
OMP400
OMI
0°
Optical
centre line
60°
45°
45°
15°
30°
30°
15°
60°
0°
60°
45°
45°
15°
30°
30°
15°
60°
75°
4 (13.1)
3 (9.8)
2 (6.5)
1
(3.3)
5 (16.4)
4 (13.1)
3 (9.8)
2 (6.5)
5 (16.4)
75°
75°
75°
Typical plot at 20 °C (68 °F)
360° transmission around
probe axis in metres (feet)
Switch on/off
Operating - standard power mode
Operating - low power mode
1
(3.3)

OMP400 installation guide
3.4
System installation
MI 12
TM
TM
CNC machining centre spindle
CNC
machine
control
Mounting bracket
Cable
Workpiece
OMM
Stylus
Power supply
(optional)
MI 12 interface
OMP400
inspection probe
Installing the OMP400 with an OMM and MI 12
The probe and OMM diodes must be in the others field of view, and within the performance envelope
shown. The OMP400 performance envelope is based on the OMM being at 0°, and vice-versa.
Natural reflective surfaces within the machine may change the signal transmission range.
Coolant residue accumulating on the OMP400 or OMM windows will have a detrimental effect on
transmission performance. Wipe clean as often as is necessary to maintain unrestricted transmission.
Operation in temperatures of 0 °C to 5 °C or 50 °C to 60 °C (32 °F to 41 °F or 122 °F to 140 °F) will
result in some reduction in range.
On large machine tools, it is possible to provide greater reception coverage by mounting two OMMs
connected to a single MI 12 interface.
CAUTION: If two systems are operating in close proximity to each other, take care to ensure that
signals transmitted from the OMP400 on one machine are not received by the receiver on the other
machine, and vice versa. When this is the case, use of the probe’s low power mode or OMM low range
setting