Renishaw OMI-2 Installation Manuals
OMI-2 optical machine interface
Installation guide
H-5191-8504-02-A
Renishaw part no: H-5191-8504-02-A
First issued: 02.2015
Revised: 08.2018
© 2015–2018 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.
The publication of material within this document
does not imply freedom from the patent rights of
Renishaw plc.
i
Contents
Before you begin .............................................................1.1
Before you begin ............................................................1.1
Disclaimer ..............................................................1.1
Trade marks .............................................................1.1
Warranty ................................................................1.1
Changes to equipment .....................................................1.1
CNC machines ...........................................................1.1
Care of the interface .......................................................1.1
Patents .................................................................1.2
EC declaration of conformity ...................................................1.3
WEEE directive .............................................................1.3
FCC Information to user (USA only) .............................................1.3
Safety ....................................................................1.4
OMI-2 basics .................................................................2.1
Introduction ................................................................2.1
Power supply ............................................................2.1
Input voltage ripple ........................................................2.1
OMI-2 visual diagnostics ......................................................2.2
Magnetic label ...........................................................2.2
START SIGNAL LED (yellow) ................................................2.3
LOW BATTERY LED (red) ..................................................2.3
PROBE STATUS LED (green, red) ............................................2.3
ERROR LED (red, blue, yellow, violet) .........................................2.3
SIGNAL CONDITION LED (red, yellow, green) ..................................2.3
OMI-2 inputs ...............................................................2.4
OMI-2 outputs ..............................................................2.4
OMI-2 output waveforms ......................................................2.5
Switches SW1 and SW2 ......................................................2.6
Switch on / switch off ......................................................2.7
OMI-2 dimensions ...........................................................2.8
OMI-2 specification ..........................................................2.9
OMI-2 installation guide
ii
Contents
System installation ...........................................................3.1
Mounting bracket (optional) ....................................................3.1
Wiring diagram (with output groupings shown) .....................................3.2
OMI-2 cable ................................................................3.3
Cable sealing ............................................................3.3
Fitting flexible conduit ......................................................3.3
Screw torque values .........................................................3.4
Maintenance .................................................................4.1
Maintenance ...............................................................4.1
Cleaning the interface .....................................................4.1
Removing the OMI-2 window ..................................................4.2
Fitting the OMI-2 window ......................................................4.2
Fault-finding .................................................................5.1
Parts list .....................................................................6.1
1.1
Before you begin
Before you begin
Disclaimer
RENISHAW HAS MADE CONSIDERABLE
EFFORTS TO ENSURE THE CONTENT OF THIS
DOCUMENT IS CORRECT AT THE DATE OF
PUBLICATION BUT MAKES NO WARRANTIES
OR REPRESENTATIONS REGARDING
THE CONTENT. RENISHAW EXCLUDES
LIABILITY, HOWSOEVER ARISING, FOR ANY
INACCURACIES IN THIS DOCUMENT.
Trade marks
RENISHAW and the probe symbol used in the
RENISHAW logo are registered trade marks of
Renishaw plc in the United Kingdom and other
countries. apply innovation and names and
designations of other Renishaw products and
technologies are trade marks of Renishaw plc or
its subsidiaries.
All other brand names and product names used
in this document are trade names, trade marks, or
registered trade marks of their respective owners.
Warranty
Equipment requiring attention under warranty
must be returned to your equipment supplier.
Unless otherwise specifically agreed in writing
between you and Renishaw, if you purchased
the equipment from a Renishaw company, the
warranty provisions contained in Renishaw’s
CONDITIONS OF SALE apply. You should consult
these conditions in order to find out the details
of your warranty but, in summary, the main
exclusions from the warranty are if the equipment
has been:
• neglected, mishandled or inappropriately used;
or
• modified or altered in any way except with the
prior written agreement of Renishaw.
If you purchased the equipment from any other
supplier, you should contact them to find out what
repairs are covered by their warranty.
Changes to equipment
Renishaw reserves the right to change equipment
specifications without notice.
CNC machines
CNC machine tools must always be operated by
fully trained personnel in accordance with the
manufacturer's instructions.
Care of the interface
Keep system components clean.
OMI-2 installation guide
1.2
Before you begin
EP 0974208
EP 1503524
JP 4294101
US 6,839,563
Patents
Features of OMI-2 (and features of similar
products) are the subject of one or more of the
following patents and/or patent applications:
1.3
Before you begin
C
FCC Information to user (USA
only)
47 CFR Section 15.19
This device complies with part 15 of the FCC
Rules. Operation is subject to the following two
conditions:
1. This device may not cause harmful
interference, and
2. This device must accept any interference
received, including interference that may
cause undesired operation.
47 CFR Section 15.21
The user is cautioned that any changes or
modifications not expressly approved by
Renishaw plc or authorised representative could
void the user’s authority to operate the equipment.
47 CFR Section 15.105
This equipment has been tested and found to
comply with the limits for a Class A digital device,
pursuant to part 15 of the FCC Rules. These limits
are designed to provide reasonable protection
against harmful interference when the equipment
is operated in a commercial environment. This
equipment generates, uses, and can radiate
radio frequency energy and, if not installed
and used in accordance with the instruction
manual, may cause harmful interference to radio
communications. Operation of this equipment
in a residential area is likely to cause harmful
interference in which case the user will be
required to correct the interference at his own
expense.
EC declaration of conformity
Renishaw plc declares under its sole responsibility
that the OMI-2 is in conformity with all relevant
Union legislation.
The full text of the EU declaration of conformity is
available at www.renishaw.com/mtpdoc.
WEEE directive
The use of this symbol on Renishaw products
and/or accompanying documentation indicates
that the product should not be mixed with
general household waste upon disposal. It is the
responsibility of the end user to dispose of this
product at a designated collection point for waste
electrical and electronic equipment (WEEE) to
enable reuse or recycling. Correct disposal of
this product will help to save valuable resources
and prevent potential negative effects on the
environment. For more information, please contact
your local waste disposal service or Renishaw
distributor.
OMI-2 installation guide
1.4
Before you begin
Safety
Information to the user
In all applications involving the use of machine
tools or CMMs, eye protection is recommended.
The OMI-2 has a glass window. Handle with care
if broken to avoid injury.
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 during 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.
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 0V/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.
• the dc supply to this equipment must be
derived from a source which is approved to
IEC/BS/EN 60950-1.
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.
OMI-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.
2.1
Introduction
The OMI-2 is a combined optical receiver and
machine interface which is designed to be
mounted within the machine’s working envelope.
The OMI-2 operates using a ‘Modulated’ optical
transmission mode and is compatible with machine
probes that also operate in ‘Modulated’ mode.
Power supply
The OMI-2 can draw its supply from the CNC
machine’s nominal 12 Vdc to 30 Vdc supply.
The maximum supply current is 100 mA when the
OMI-2 is transmitting and 40 mA when the OMI-2
is receiving.
The values quoted are based on a 24 Vdc and
assume all outputs are open circuit.
CAUTION: This equipment will only perform to
specication if the power supply 0 V is connected
to the machine ground (star point).
Input voltage ripple
The input voltage ripple must not cause the
voltage to fall below 12 V or rise above 30 V.
OMI-2 basics
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