Renishaw OMP40 User manual

Installation and user’s guide
H-2000-5022-05-A
OMP40

© 2001 - 2006 Renishaw. 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.
The publication of material within this document
does not imply freedom from the patent rights of
Renishaw plc.
Disclaimer
Considerable effort has been made to ensure
that the contents of this document are free
from inaccuracies and omissions. However,
Renishaw makes no warranties with respect to
the contents of this document and specifically
disclaims any implied warranties. Renishaw
reserves the right to make changes to this
document and to the product described herein
without obligation to notify any person of such
changes.
Trademarks
RENISHAW® and the probe emblem used in the
RENISHAW logo are registered trademarks of
Renishaw plc in the UK and other countries.
apply innovation and Trigger Logic are
trademarks of Renishaw plc.
All other brand names and product names used
in this document are trade names, service marks,
trademarks, or registered trademarks of their
respective owners.
Patent notice
Features of OMP40 probes and features of similar
probes are the subject of one or more of the
following patents and/or patent applications:
EP 0,695,926 EP 0,390,342 EP 0,974,208
EP 1,130,557 EP 1,397,637 EP 1,373,995
EP 1,185,838 EP 1,477,767 EP 1,477,768
US 5,669,151 US 5,040,931 US 5,212,872
US 6,472,981 US 6,776,344 US 6,860,026
US 6,839,563 US 2002-219,886
US 2003-0,179,097
JP 2,945,709 JP 2001-53,062
JP 2003-526,170 JP 2004-522,961
JP 2004-530,234 JP 2001-520,844
Renishaw part no: H-2000-5022-05-A
Issued: 06 2006

1
PRELIMINARY
Safety ...................................................................3
Warranty ...............................................................3
Changes to equipment .........................................3
CNC machine .......................................................3
Caring for the probe..............................................3
Probe IP rating......................................................3
Related publications .............................................3
INSTALLATION
Typical probe system using OMI...........................4
Typical probe system using OMM and MI 12........5
Twin OMMs and remote indicator using MI 12 .....6
Battery specification .............................................7
Installing the batteries...........................................8
Performance envelope with OMI...........................9
Performance envelope with OMM.......................10
OMP40 features .................................................11
OMP40 and system performance.......................12
OMP40 dimensions ............................................14
Probe/shank mounting........................................15
Stylus on-centre adjustment...............................16
Shank adaptor assembly (optional)....................17
OPERATION
Probe moves ......................................................19
Software requirements .......................................21
Typical probe cycles for machining centres ........23
Replacing batteries.............................................25
Modes of operation.............................................27
Reviewing current probe settings .......................31
Changing probe settings.....................................32
SERVICE AND MAINTENANCE........................36
FAULT FINDING.................................................37
PARTS LIST .......................................................41
Contents

2
EC DECLARATION OF CONFORMITY
Renishaw plc declares that the product:
Name Description
OMP40 Optical machine probe
has been manufactured in conformity with the following standards:
BS EN 61326: 1998/ Electrical equipment for measurement,
A1:1998/A2:2001 control and laboratory use - EMC
requirements. Immunity to annex A
- industrial locations. Emissions to class A
(non-domestic) limits.
and that it complies with the requirements of the following
directives (as amended):
89/336/EEC Electromagnetic compatibility
The above information is summarised from the full EC Declaration
of Conformity. A copy is available from Renishaw on request.
FCC
Information to user (FCC Section 15.19)
This device complies with Part 15 of the FCC rules. Operation is
subject to the following conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received, including
interference that may cause undesired operation.
Information to user (FCC 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 this installation guide, may cause harmful
interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference, in which
case you will be required to correct the interference at your own
expense.
Information to user (FCC 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.
Preliminary information

3
Safety
Only qualified persons should change the switch
settings or replace fuses.
Where appropriate, remove the mains supply from
units before removing covers.
Warranty
Equipment requiring attention under warranty
must be returned to your supplier. No claims will
be considered where Renishaw equipment has
been misused, or repairs or adjustments have
been attempted by unauthorised persons.
Changes to equipment
Renishaw reserves the right to change
specifications without notice.
CNC machine
CNC machine tools must always be operated
by competent persons in accordance with the
manufacturer’s instructions.
Care of the probe
Keep system components clean and treat the
probe as a precision tool.
Probe IP rating
IPX8
Related publications
When you install the OMP40 probe system,
you will also need to refer to one or more of the
publications listed below for details of how to
install the ancillary equipment.
•Optical module machine (OMM) installation
and user’s guide – Renishaw part No.
H-2000-5044.
•MI 12 interface unit installation and user’s
guide – Renishaw part No. H-2000-5073.
•Optical machine interface (OMI) installation
and user’s guide – Renishaw part No.
H-2000-5062.
•PSU3 power supply unit installation and
user’s guide – Renishaw part No.
H-2000-5057.
!
Preliminary information

4
A workpiece set-up and inspection probe is, in
effect, another tool in the system. A probe cycle
may be included at any stage of the machining
process.
Signals are transmitted between the probe and
the machine’s control, via the OMI or alternatively
the OMM + MI 12. Interface units convert probe
signals into an acceptable form for the machine’s
control.
Stylus
CNC machining
centre spindle
Typical tool
setting probe
CNC
machine
control
Optional - PSU3
power supply unit
OMP40
inspection probe
Mounting bracket
Interface unit
Cable
Optional - PSU3
power supply unit
Workpiece
OMP - LEDs
(Light emitting diodes)
3 x receive diodes
12 x transmit LEDs
3 x probe status LEDs
OMI
Typical probe system using OMI
Typical probe system using OMI

5
Stylus
CNC machining
centre spindle
Typical tool
setting probe
CNC
machine
control
OMP40
inspection probe
Cable
Optional - PSU3
power supply unit
Optional - PSU3
power supply unit
Workpiece
Mounting bracket
OMM
Interface unit
OMP - LEDs
(Light emitting diodes)
3 x receive diodes
12 x transmit LEDs
3 x probe status LEDs
Typical probe system using OMM and MI 12
Typical probe system using OMM and MI 12
MI 12

6
Twin OMM mounting
On large machine tools it is possible to provide
greater reception coverage by mounting two
OMMs connected to a single MI 12.
Remote indicator
The MI 12 interface contains an LED and acoustic
indicator. When the probe is triggered the LED
will change state and a beep is emitted.
If the MI 12 is hidden from the operator, a remote
lamp or bleeper may be placed in a position where
it is easily seen or heard.
Twin OMMs and remote indicator using MI 12
Twin OMMs and remote indicator using MI 12

7
Battery specification
Recommended batteries:
Ecocel: EB 1425, EB 1426
Saft: LS 14250 C, LS 14250
Sonnenschein: SL-750
Xeno: XL-050F
Unsuitable batteries (due to OMP40 power
requirements):
Dubilier: SB-AA02
Maxell: ER3S
Sanyo: CR 14250 SE
Sonnenschein: SL-350, SL-550
Tadiran: TL-4902 TL-5902, TL-2150, TL-5101
Varta: CR 1/2 AA
Battery specification
The probe requires two ½ AA size Lithium Thionyl
Chloride batteries, individually rated at a voltage of
3.6 V. It is important that the batteries are supplied
in standard (button) form; batteries described as
tagged will have additional connection tag features
fitted to the terminals and are not suitable.
Stand-by life 5% usage - 72 minutes/day Continuous use
Typical (days) Typical (days) Typical (hours)
Standard
power mode
Low power
mode
Standard
power mode
Low power
mode
Standard
power mode
Low power
mode
1900 1900 115 175 140 210
Battery life

8Installing the batteries
Installing the batteries
Step 1: Unlock the
battery cassette
Step 2: Insert the
batteries
Step 3: Lock the
battery cassette

9Performance envelope with OMI
OMP40 probe + OMI
Probe and OMI diodes must be in the other’s field
of view, and within the performance envelope
shown.
360° range metres (feet)
SWITCH ON/OFF OPERATING
OMP40 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)
1
(3.3)
5
(16.4)
Performance envelope with OMI

10 Performance envelope with OMM
Performance envelope with OMM
OMP40 probe + OMM
Probe and OMM diodes must be in the other’s
field of view, and within the performance envelope
shown.
360° range metres (feet)
SWITCH ON/OFF OPERATING
0°
OMP40
60°
45°
45°
15°
30°
30°
75°
15°
60°
OMM
0°
60°
45°
45°
15°
30°
30°
75°
15°
60°
4
(13.1)
3
(9.8)
2
(6.5)
1
(3.3)
5
(16.4)
4
(13.1)
3
(9.8)
2
(6.6)
1
(3.3)
5
(16.4)
Optical
centre
line

11
Batteries
2 x ½AA
M4 stylus
A range of shanks is available
from Renishaw upon request
For further battery details see page 7
OMP window
3 x receive diodes
12 x transmit LEDs
3 x probe status LEDs
OMP40 features
Battery cassette
OMP40 features

12
Operating envelope
Natural reflective surfaces within the machine may
increase the signal transmission range.
Coolant residue accumulating on the OMP, OMM
and OMI 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.
Warning
If two systems are operating in close proximity,
take care to ensure that signals transmitted from
the OMP on one machine, are not received by
the OMM or OMI on the other machine, and vice
versa.
When this is the case, use of the probe’s low
power mode, or OMM and OMI low range setting
is recommended (see page 30).
OMM and OMI position
To assist in finding the optimum position of the
OMM during system installation, signal strength
outputs are available on the MI 12 interface.
OMI signal strength is displayed on an OMI
multi-coloured LED.
Collision protection devices
Only ceramic styli are recommended
for use with OMP40. OMP40 is not
compatible with any stylus ‘weak link’
protection devices, except when fitted
after a stylus extension.
OMP40 and system performance
!
OMP40 and system performance

13
Environment
Probe repeatability
Maximum 2 Sigma (2σ) Value;
Repeatability of 1.0 µm (0.00004 in) is valid for
test velocity of 480 mm/min (1.57 ft/min) at stylus
tip, using stylus 50 mm (1.97 in) long.
Stylus trigger force
X/Y trigger forces vary around the stylus seating.
X/Y direction - typical lowest force 0.50 N / 50 gf
(1.76 ozf)
X/Y direction - typical highest force 0.9 N / 90 gf
(3.17 ozf)
Z direction - 5.85 N / 585 gf (20.62 ozf)
Probe IP rating IPX8
Probe weight without shank
OMP40 probe without batteries 242 g (8.53 oz)
OMP40 probe with batteries 262 g (9.24 oz)
OMP40 and system performance
Probe/OMP OMM
MI 12 interface
OMI PSU3
Temperature
Storage -10 °C to 70 °C
(14 °F to 158 °F)
Normal operating 5 °C to 50 °C
(41 °F to 122 °F)

14
Probe-ready shanks available from Renishaw.
12.5°
12.5°
19 (0.75)
Ø40
(1.57)
50 (1.97)
50 (1.97)
OMP40 dimensions
dimensions mm (in)
OMP40 dimensions

15
Stylus alignment with the spindle’s centre line
need only be approximate, except in the following
circumstances.
1. When probe vector software is used.
2. When the machine control software cannot
compensate for an offset stylus.
How to check stylus position
Stylus tip and stem position are established using a
low force (less than 20 g [0.71 oz]) dial test indicator
or setting gauge. Alternatively, rotate the stylus ball
against a flat surface. Alignment is good when the
stylus ball maintains a consistent distance from the flat
surface.
Stage 1 - Probe/shank mounting
1. Fully slacken screws A. Then grease screws B,
and fit to shank.
2. Fit the probe onto the shank, and visually position
the probe centrally relative to the shank. Partially
tighten screws B to 1 Nm (0.23 lbf).
3. Fit the probe/shank assembly into the machine
spindle.
PROBE
SHANK
A➤
B➤
Probe/shank mounting
Probe/shank mounting

16
Notes : During adjustment, care should be
taken not to rotate the probe relative to the shank.
If a probe/shank unit is accidentally dropped, it
should be checked for on-centre position.
Do not hit or tap the probe to achieve on-centre
adjustment.
Stage 2 - Adjustment
4. There are four screws A. Each will move
the probe relative to the shank, in the X or
Y direction as pressure is applied. Tighten
individually, backing off after each movement.
5. When centering with screws A, progressively
tighten as the final setting is approached.
Slackening on one side and tightening the
opposite screw, in sequence.
6. When the stylus tip run-out is less than
20 µm (0.0008 in), fully tighten screws B to
max 2.2 Nm (0.49 lbf), and use screws Ain
opposition to move the probe at the same
time. Use two hexagonal keys if necessary.
Tip run out of 5 µm (0.0002 in) should be
achievable.
7. It is important that all four screws A are tight
or tightened to a maximum of 2.2 Nm
(0.49 lbf) once the final setting has been
achieved.
SHANK
B
➤
PROBE
Stylus on-centre adjustment
A
➤
Stylus on-centre adjustment

17
Shank adaptor assembly (optional)
Shank adaptor assembly (optional)
1. Remove. 2. Mount adaptor plate. 3. Grease and
assemble adaptor.
4. Fit to shank.
3 Nm (0.68 lbf) 3 Nm (0.68 lbf)

18 Shank adaptor assembly (optional)
6 Nm
(1.35 lbf)
5. Fully tighten 6. Fit to spindle
7. Screw in opposition to adjust
runout <5 µm. Fully tighten to
2.2 Nm (0.49 lbf) when complete.