Renishaw OMP40-2 User manual

OMP40-2 optical machine probe
Installation guide
H-4071-8504-05-B

Renishaw part no: H-4071-8504-05-B
Issued: 02.2009
Revised 11.2019
09.2022
© 2009–2022 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.
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 .............................................................1.1
Disclaimer .................................................................1.1
Trademarks ................................................................1.1
Warranty ..................................................................1.1
CNC machines .............................................................1.1
Care of the probe ...........................................................1.2
Patents ...................................................................1.2
Intended use ...............................................................1.2
Safety ....................................................................1.3
Microchip software licensing agreement ..........................................1.5
OMP40-2 basics ..............................................................2.1
Introduction ................................................................2.1
Getting started ...........................................................2.1
System interface..........................................................2.2
Trigger Logic™ ...........................................................2.2
Probe modes...............................................................2.2
Configurable settings.........................................................2.3
Switch-off methods........................................................2.3
Enhanced trigger filter .....................................................2.4
Optical transmission method ................................................2.4
Optical power ............................................................2.5
OMP40-2 dimensions ........................................................2.5
OMP40-2 specification .......................................................2.6
Typical battery life.........................................................2.7
System installation ...........................................................3.1
Installing the OMP40-2 with OMM-2 receiver with OSI or OSI-D interface or OMI-2 /
OMI-2T / OMI-2H interface / receiver ............................................3.1
Operating envelope .......................................................3.1
Positioning the OMM-2 receiver with OSI or OSI-D interface or OMI-2 / OMI-2T /
OMI-2H interface / receiver .................................................3.2
Installing the OMP40-2 with a OMM-2C receiver with OSI or OSI-D interface .............3.3

OMP40-2 installation guide
ii
Contents
Operating envelopes ......................................................3.3
Positioning the OMM-2C receiver with OSI or OSI-D interface ......................3.4
Preparing the OMP40-2 for use ................................................3.5
Fitting the stylus ..........................................................3.5
Stylus weak link ..........................................................3.6
Installing the batteries .....................................................3.7
Mounting the probe on a shank ..............................................3.8
Stylus on-centre adjustment.................................................3.9
Calibrating the OMP40-2.....................................................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™ ...............................................................4.1
Reviewing the probe settings ..................................................4.1
Probe settings record ........................................................4.2
Changing the probe settings ...................................................4.3
Master reset function.........................................................4.4
Operating mode.............................................................4.6
Maintenance .................................................................5.1
Maintenance ...............................................................5.1
Cleaning the probe ..........................................................5.1
Changing the batteries .......................................................5.2
OMP40M system .............................................................6.1
OMP40M system............................................................6.1
OMP40M dimensions ........................................................6.1
OMP40M screw torque values .................................................6.2
OMP40-2LS system ..........................................................7.1
Introduction ................................................................7.1
Performance envelope with an OMM-2 receiver with OSI or OSI-D interface or OMI-2 /
OMI-2T / OMI-2H interface / receiver ..........................................7.1
Fault-finding .................................................................8.1
Parts list .....................................................................9.1

1.1
Before you begin
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.
CNC machines
CNC machine tools must always be operated by fully trained personnel in accordance with the
manufacturer’s instructions.

OMP40-2 installation guide
1.2
Before you begin
Care of the probe
Keep system components clean and treat the probe as a precision tool.
Patents
Features of the OMP40-2 probe, and other similar Renishaw probes, are subject of one or more of the
following patents and / or patent applications:
EP 1457786
US 7285935
US 7486195
Intended use
The OMP40-2 is an optical spindle probe that enables automated workpiece inspection and job set-up
on multi-tasking machines and machining centres.

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.

OMP40-2 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.
OMP40-2 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.

1.5
Before you begin
Microchip software licensing agreement
This product’s firmware has been developed by Renishaw with the use of the Microchip libraries, under
the following licensing terms:-
This software is developed by Microchip Technology Inc. and its subsidiaries (“Microchip”).
Redistribution and use in source and binary forms, with or without modification, are permitted provided
that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this list of conditions and
the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions
and the following disclaimer in the documentation and/or other materials provided with the
distribution.
3. Microchip’s name may not be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY MICROCHIP “AS IS” AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
MICROCHIP BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL DAMAGES (INCLUDING BUT NOT LIMITED TO PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA OR PROFITS; OR BUSINESS
INTERRUPTION) HOWSOEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
OF SUCH DAMAGE.
(c) Copyright 1999-2013 Microchip Technology, All rights reserved

OMP40-2 installation guide
1.6
Before you begin
This page is intentionally left blank.

2.1
OMP40-2 basics
Introduction
The OMP40-2 is an optical machine tool probe suitable for use on small to medium machining and
small multi-tasking centres. It is designed to resist optical interference, false triggering and shock.
The OMP40-2 can be operated in either ‘Modulated’ or ‘Legacy’ optical transmission modes (see page
4.1, “Reviewing the probe settings”, for further information).
When operating in ‘Modulated’ mode, the OMP40-2 becomes compatible for use with an OMM-2 or
OMM-2C receiver with an 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.
In ‘Modulated’ mode, it is possible to define the probe ID. This is factory set to PROBE 1, but can be
changed to PROBE 2 for use with twin probes or PROBE 3 for use with multiple probe systems.
In ‘Legacy’ mode, the OMP40-2 is compatible with an OMM receiver and an MI 12 interface, or with an
OMI receiver / interface.
All OMP40-2 settings are configured using Trigger Logic™. This technique enables the user to review
and subsequently change probe settings by deflecting the stylus whilst observing the LED display.
Configurable settings are:
• Switch-on / switch-off method
• Enhanced trigger filter setting
• Optical transmission method
• Optical power
Getting started
Three multicolour probe LEDs provide visual indication of selected probe settings.
For example:
• Switch-on and switch-off methods
• Probe status – triggered or seated
• Battery condition
see Section 1, “RMP60 basics”

OMP40-2 installation guide
2.2
OMP40-2 basics
System interface
The interface conveys and processes signals between the probe and CNC machine controller.
OMM-2 or OMM-2C receiver with OSI or OSI-D interface or OMI-2 / OMI-2T / OMI-2H / OMI-2C
receiver / interface (modulated transmission)
The OMI-2T receiver / interface or OMM-2 receiver with OSI or OSI-D interfaces are the recommended
interfaces for use with the OMP40-2 as they provide substantially increased resistance to light
interference whilst providing the user greater flexibility to operate a multiple probe system.
OMI receiver / interface or OMM receiver with MI 12 interface (legacy transmission)
Alternative interfaces are the OMI receiver / interface or OMM receiver with the MI 12 interface.
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 deflections (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.
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 (see page 4.1, “Reviewing the
probe settings”, for further information).
Probe modes
The OMP40-2 probe can be set in one of three modes:
Standby mode – probe is waiting for a switch-on signal.
Operational mode – when activated by one of the switch-on methods described later in this section.
The probe is switched on and ready for use.
Configuration mode – where Trigger Logic may be used to configure the following probe settings.
NOTE: A visual indication of currently selected probe settings is provided on battery insertion, by the
three multicolour LEDs located within the probe window (see Section 4, “Trigger Logic™”).

2.3
OMP40-2 basics
OMP40-2 switch-on method OMP40-2 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 90minutes
after the last trigger if it is not
switched off by machine input.
Legacy (start filter off):
0.3 seconds
Legacy (start filter on):
0.8seconds
Modulated: 0.3 seconds
Optical on
Optical switch-on is
commanded by machine input
or auto start.
Timer off (timeout)
Timeout will occur 12, 33 or 134
seconds (user configurable) after the
last probe trigger or reseat.
NOTE: Issuing a further M code
during the timeout period will also
reset the timer.
Configurable settings
Switch-off methods
The following switch-off options are user-configurable.
1. Optical on / Optical off
2. Optical on / Timer off

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 10ms 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 PROBE2 start (OMI-2T or OMM-2 with OSI or OSI-D) or PROBE3 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.

2.5
OMP40-2 basics
OMP40-2 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)
Dimensions given in mm (in)
50 (1.97) 19 (0.75)
12.5°
12.5°
50 (1.97)
Ø40 (1.57)
A range of probe-ready shanks
are available from Renishaw
Battery cassette
Window
M4 stylus
XY overtravel
Transmit diode
Receive diode
Probe status LED
Optical power
Where the separation between the OMP40-2 and the receiver is small, low optical power may be
used. In this setting, the optical transmission range will be reduced, as shown on the performance
envelopes, so that battery life will be extended.
Ultra low power is recommended for any machine using the OMM-2C receiver or for use in small
machining centers where the maximum separation distance between probe to receiver is less than 1.5
m (4.9 ft), for further increased battery life.
Low or ultra low optical power should be used whenever possible for increased battery life.
Dotted lines on the performance envelopes represent the OMP40-2 in low and ultra low optical power
modes.
Maximum battery life is achieved when lithium-thionyl chloride (LTC) batteries are used in conjunction
with ultra low power mode.
The probe is factory set to standard optical power.

OMP40-2 installation guide
2.6
OMP40-2 basics
Principal application Workpiece inspection and job set-up on small to medium machining
centres and small multi-tasking machines.
Dimensions Length
Diameter
50mm (1.97 in)
40mm (1.57 in)
Weight (without shank) With batteries
Without batteries
250 g (8.82 oz)
234 g (8.25 oz)
Transmission type 360° infrared optical transmission (modulated or legacy)
Switch-on method Optical on
Switch-off methods Optical off or Timer off
Spindle speed (maximum) 1000 rev/min
Operating range Up to 5 m (16.4 ft)
Compatible receiver/
interface
Modulated
OMM-2 or OMM-2C with
OSI or OSI-D or with
OMI-2 / OMI-2T / OMI-2H
/ OMI-2C
Legacy
OMI / OMM with MI 12
Sense directions ±X, ±Y, +Z
Unidirectional repeatability 1.00 µm (40 µin) 2s(see note 1)
Stylus trigger force
(see notes 2 and 3)
XY low force
XY high force
Z
0.50 N, 51 gf (1.80 oz)
0.90 N, 92 gf (3.24 oz)
5.85 N, 597 gf (21.04 oz)
Stylus overtravel XY plane
+Z plane
±12.5°
6 mm (0.24 in)
Environment IP rating IPX8, BS EN 60529:1992+A2:2013
IK rating (OMP40-2 and
OMP40-2 LS)
IK01, BS EN 62262:2002+A1:2021
[for glass window]
IK rating (OMP40M) IK02, BS EN 62262:2002+A1:2021
[for glass window]
Storage temperature –25 °C to +70 °C (–13 °F to +158 °F)
Operating temperature +5 °C to +55 °C (+41 °F to +131 °F)
Battery types 2 x ½AA 3.6 V lithium-thionyl chloride (LTC)
Battery reserve life Approximately one week after a low battery warning is first given
(based on 5% usage).
Typical battery life See page 2.7
Note 1 Performance specification is tested at a standard test velocity of 480 mm/min (18.9 in/min) with a 50 mm stylus.
Significantly higher velocity is possible depending on application requirements.
Note 2 Trigger force, which is critical in some applications, is the force exerted on the component by the stylus when the
probe triggers. The maximum force applied will occur after the trigger point (overtravel). The force value depends
on related variables, including measuring speed and machine deceleration.
Note 3 These are the factory settings; manual adjustment is not possible.
OMP40-2 specification

2.7
OMP40-2 basics
Typical battery life
Modulated transmission
2 × ½AA 3.6 V LTC batteries
(typical)
Standard power Low power Ultra low power
Standby life 600 days 1500 days 1500 days
Light usage 1% 460 days 1000 days 1200 days
Heavy usage 5% 220 days 480 days 600 days
Continuous use 480 hours 960 hours 1350 hours

OMP40-2 installation guide
2.8
OMP40-2 basics
This page is intentionally left blank.

3.1
System installation
see Section 2, “System installation”
Installing the OMP40-2 with OMM-2 receiver with OSI or OSI-D
interface or OMI-2 / OMI-2T / OMI-2H interface / receiver
Operating envelope
When used with the OMM-2 receiver with OSI or OSI-D interface or the OMI-2 / OMI-2T / OMI-2H
interface / receiver, the OMP40-2 uses modulated transmission.
Natural reflective surfaces within the machine may increase the signal transmission range.
Coolant and swarf residue accumulating on the probe or receiver / interface windows will have a
detrimental effect on transmission performance. Wipe clean as often as necessary to maintain
unrestricted transmission.
WARNING: Ensure the machine tool is in a safe condition and power is removed before removing
covers. Only qualied persons should adjust switches.
OMP40-2 probe
Workpiece CNC machine
controller
OMI-2 / OMI-2T
or OMI-2H OMM-2
CNC machine
controller
OSI or OSI-D
interface unit

OMP40-2 installation guide
3.2
System installation
OMP40-2
OMM-2
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)
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 m (ft)
1 (3.3) 1 (3.3)
Switch-on / switch-off
Operating – standard power mode
Operating – low power mode
Operating – ultra low power mode
CAUTION:
If two or more systems are operating in close proximity to each other, take care to ensure that signals
transmitted from the OMP40-2 on one machine are not received by the receiver on the other machine,
and vice versa. When this is the case it is recommended that the OMP40-2 low or ultra low optical
power is used and that the low range setting is used on the receiver.
Positioning the OMM-2 receiver with OSI or OSI-D interface or OMI-2 / OMI-2T /
OMI-2H interface / receiver
WARNING: Ensure the machine tool is in a safe condition and power is removed before removing
covers. Only qualied persons should adjust switches.
To assist in nding the optimum position for the OMM-2 receiver with OSI or OSI-D interface or the
OMI-2 / OMI-2T / OMI-2H receiver / interface, signal condition is indicated on a multicoloured LED.
Performance envelope when using the OMP40-2 with a OMM-2 receiver or OMI-2 / OMI-2T or
OMI-2H interface / receiver (modulated transmission)
The diodes of the OMP40-2 and the OMM-2 receiver / OMI-2 / OMI-2T / OMI-2H interface / receiver
must be in each other’s field of view and within the performance envelope shown. The OMP40-2
performance envelope is based on the optical centre line of the OMM-2 / OMI-2 / OMI-2T / OMI-2H
being at 0° and vice versa.