Renishaw RMP40 User manual

RMP40 radio machine probe
Installation guide
H-5480-8504-04-B

Renishaw part no: H-5480-8504-04-B
First issued: 02.2010
Revised: 09.2022
© 2010-2022 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
Trade marks................................................................1.1
Warranty ..................................................................1.1
Changes to equipment .......................................................1.1
CNC machines .............................................................1.2
Care of the probe ...........................................................1.2
Patents ...................................................................1.2
Intended use ...............................................................1.3
Safety ....................................................................1.3
RMP40 basics ................................................................2.1
Introduction ................................................................2.1
Getting started ...........................................................2.1
System interface ............................................................2.2
Trigger Logic ...............................................................2.2
Probe modes...............................................................2.2
Configurable settings.........................................................2.2
Switch-on / switch-off methods...............................................2.2
Enhanced trigger filter .....................................................2.3
Multiple probe mode.......................................................2.4
Acquisition mode .........................................................2.5
RMP40 dimensions ..........................................................2.6
RMP40 specification .........................................................2.7
Typical battery life.........................................................2.8
System installation ...........................................................3.1
Installing the RMP40 with an RMI or RMI-Q .......................................3.1
Positioning the RMP40 and RMI or RMI-Q .....................................3.2
Performance envelope .....................................................3.2
Preparing the RMP40 for use ..................................................3.3
Fitting the stylus ..........................................................3.3

ii
Contents
Installing the batteries .....................................................3.4
Mounting the probe on a shank ..............................................3.5
Stylus on-centre adjustment.................................................3.6
Calibrating the RMP40 .......................................................3.7
Why calibrate a probe? ....................................................3.7
Calibrating in a bored hole or on a turned diameter...............................3.7
Calibrating in a ring gauge or on a datum sphere ................................3.7
Calibrating the probe length .................................................3.8
Trigger Logic™ ...............................................................4.1
Reviewing the probe settings ..................................................4.1
Multiple probe mode settings ..................................................4.2
Probe settings record ........................................................4.3
Changing the probe settings ...................................................4.4
RMP40 – RMI partnership.....................................................4.6
RMP40 – RMI-Q partnership...................................................4.7
Operating mode.............................................................4.8
Maintenance .................................................................5.1
Maintenance ...............................................................5.1
Cleaning the probe ..........................................................5.1
Changing the batteries .......................................................5.2
RMP40M system .............................................................6.1
RMP40M system............................................................6.1
RMP40M dimensions ........................................................6.2
RMP40M screw torque values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.2
Fault-finding .................................................................7.1
Parts list .....................................................................8.1

1.1
Before you begin
Section 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.
Trade marks
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.
Changes to equipment
Renishaw reserves the right to change equipment specifications without notice.

1.2
Before you begin
CN 100416216
CN 100466003
CN 101476859
CN 101482402
EP 1425550
EP 1457786
EP 1477767
EP 1576560
EP 1613921
EP 1804020
EP 1931936
EP 2216761
IN 215787
IN 234921
IN 8707/DELNP/2008
WO 2004/057552
JP 4237051
JP 4575781
JP 4852411
JP 5238749
JP 5390719
KR 1001244
TW I333052
US 6941671
US 7285935
US 7316077
US 7486195
US 7665219
US 7821420
US 9140547
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 RMP40, and other similar Renishaw products, are the subject of one or more of the
following patents and/or patent applications:

1.3
Before you begin
Intended use
The RMP40 is a radio spindle probe that enables automated workpiece inspection and job set-up on
multi-tasking machines and machining centres.
Safety
Information to the user
This product is supplied with non-rechargeable batteries that do not contain lithium. For specific battery
operating, safety and disposal guidelines refer to the battery manufacturers’ literature.
• 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 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
batteries or this product with the batteries inserted. 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.
If the probe fails, the probe signal may falsely indicate a probe seated condition. Do not rely on probe
signals to halt the movement of the machine.

1.4
Before you begin
Information to the equipment installer
All Renishaw equipment is designed to comply with the relevant EU 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,
(for example power transformers, servo drives):
• 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 (for example, motor power supply
cables), 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.

2.1
RMP40 basics
Introduction
The RMP40 forms part of Renishaw’s family of radio transmission probes. It is ideally suited to large
machining centres or where line-of-sight between probe and receiver is difficult to achieve or where Z
travel is limited.
The RMP40 features an integrated probe module delivering exceptional robustness and generous
overtravel.
The RMP40 complies with FCC regulations and operates in the 2.4 GHz band. It delivers
interference-free transmission through the use of frequency hopping spread spectrum (FHSS), which
allows several systems to operate in the same machine shop without risk of cross-interference.
All RMP40 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:
• Radio on / Radio off
• Radio on / Timer off
• Spin on / Spin off
• Spin on / Timer off
• Filter on / Filter offf
• Multiple probe mode on / Multiple probe mode off.
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
Batteries are inserted or removed as shown (for more information, see page 3.4, “Installing the
batteries”).
On insertion of batteries, the LEDs will begin to flash (for more information, see page 4.1, “Reviewing
the probe settings”).
Section 2, “RMP60 basics”

2.2
RMP40 basics
RMP40 installation guide
System interface
The RMI and RMI-Q integrated interfaces/receivers are used to communicate between the RMP40
probe and the machine controller.
Trigger Logic
Trigger Logic™ (for more information, see page 4.1, “Reviewing the probe settings”) 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 following app stores
or
Current probe settings can also be reviewed by simply removing the batteries for a minimum
of 5 seconds, and then replacing them to activate the Trigger Logic review sequence (for more
information, see page 4.1, “Reviewing the probe settings”).
Probe modes
The RMP40 probe can be in one of three modes:
Standby mode: where the probe is awaiting a switch-on signal.
Operational mode: activated by one of the switch-on methods described on the next page. In this
mode the RMP40 is ready for use.
Configuration mode: where Trigger Logic may be used to configure the probe settings.
Configurable settings
Switch-on / switch-off methods
The following switch-on / switch-off options are user-configurable.
•Radio on / Radio off
•Radio on / Timer off
•Spin on / Spin off
•Spin on / Timer off

2.3
RMP40 basics
RMP40 switch-on method
Switch-on options are configurable
RMP40 switch-off method
Switch-off options are configurable
Switch-on time
Radio on
Radio switch on is commanded by
machine input.
Radio off
Radio switch off is commanded by
machine input. A timer automatically
switches the probe off 90 minutes
after the last trigger or reseat if it is
not turned off by machine input.
Timer off (timeout)
Timeout will occur 12, 33 or 134
seconds (user configurable) after the
last probe trigger or reseat.
1 second maximum
Note: This assumes
a good radio
communication link.
In a poor RF
environment this may
rise to a maximum of
3 seconds.
Spin on
Spin at 500 r/min for 1 second
minimum (6 seconds maximum).
Spin off
Spin at 500 r/min for 1 second
minimum (6 seconds maximum).
A timer automatically switches the
probe off 90 minutes after the last
trigger if it is not spun.
Timer off (timeout)
Timeout will occur 12, 33 or 134
seconds (user configurable) after the
last probe trigger or reseat.
2 seconds maximum.
Note: The 2 seconds
starts from the
moment the spindle
reaches 500 r/min.
NOTE: After being switched on, the RMP40 must be on for 1 second minimum. When using spinon /
spinoff, ensure that the probe is stationary for 1 second minimum after it has stopped spinning before
using spin on.
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 10 ms delay is introduced to the probe’s output.
The RMP40 is factory-set to trigger filter off.
NOTE: It may be necessary to reduce the probe approach speed to allow for the increased stylus
overtravel during the extended time delay.

2.4
RMP40 basics
Multiple probe mode
The RMP40 can be configured, using Trigger Logic, to allow multiple radio probes to be used with a
single RMI or RMI-Q.
NOTES:
The “radio on” switch-on method cannot be used in “multiple probe mode”. “Multiple probe
mode” will not appear as an option if the “radio on” option has been selected.
RMP40 probes which are set to “multiple probe mode on” can coexist alongside any number of
RMP40 probes set to “multiple probe mode off”.
To allow multiple radio probes to work in close proximity, and with a single RMI or RMI-Q, 16 choices
of “mode on” colours are available, each representing a different machine tool installation (for more
information, see page 4.2, “Multiple probe mode settings”).
All probes operating with a single RMI or RMI-Q must be set to the same “mode on” colour choice;
any multiple probes located on adjacent machines must all be set to an alternative “mode on” colour
choice.
Only one probe per “mode on” colour choice needs to be partnered with the RMI or RMI-Q as, by
configuring multiple probes to a single “mode on” colour choice, all probes using this “mode on”
colour choice will have the same identity. The probe to be partnered is partnered after selecting the
“multiple probe mode” setting and choosing the “mode on” option. See Section 4, “Trigger Logic”.
There is no limit to the number of probes that can be used with a single RMI or RMI-Q as long as they
all have the same “mode on” colour choice.
All RMP40 probes are factory-set to “mode off”.
The addition of any further probe(s) into a single probe installation will require that all probes are
reconfigured to the same “mode on” colour choice and that one of the probes is then repartnered with
the RMI or RMI-Q.
The addition of any further probe(s), or replacements, into a multi-probe installation can be achieved
simply through the reconfiguration of the probe to the same “mode on” colour choice.

2.5
RMP40 basics
Acquisition mode
System set-up is achieved using Trigger Logic and powering-on the RMI or RMI-Q, or applying ReniKey.
Partnering is only required during initial system set-up. Further partnering will be required if the RMP40,
RMI or RMI-Q is changed.
NOTES:
Systems using the RMI-Q can be partnered with up to four RMP40s manually. Alternatively this can be
achieved by using ReniKey; a Renishaw machine macro cycle which does not require the RMI-Q to be
power cycled.
For more information or to download ReniKey free of charge visit:
www.renishaw.com/mtpsupport/renikey
Partnering by ReniKey is not available for RMI.
Partnering will not be lost by reconfiguration of probe settings or when changing batteries, except
where “multiple probe mode” is selected. Partnering can take place anywhere within the operating
envelope.

2.6
RMP40 basics
RMP40 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)
50 (1.97) 19 (0.75)
12.5°
12.5°
50 (1.97)
Ø40 (1.57)
A range of probe-ready shanks
is available from Renishaw
Battery cassette
M4 stylus
XY overtravel
Probe status LED
Window
Dimensions given in mm (in)

2.7
RMP40 basics
RMP40 specification
Principal application Workpiece inspection and job set-up on machining centres and 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)
230 g (8.11 oz)
Transmission type Frequency hopping spread spectrum (FHSS) radio
Radio frequency 2400 MHz to 2483.5 MHz
Switch-on methods Radio M-code, spin
Switch-off methods Radio M-code, spin, timeout
Spindle speed (maximum) 1000 r/min
Operating range Up to 15 m (49.2 ft)
Receiver/interface RMI or RMI-Q combined antenna, interface and receiver unit
Sense directions Omni-directional ±X, ±Y, +Z
Unidirectional
repeatability
Maximum 2σvalue in any
direction
1.00 µm (40 µin) 2σ 1
Stylus trigger force 2, 3
XY low force
XY high force
Z
0.50 N, 51 gf (1.80 ozf)
0.90 N, 92 gf (3.24 ozf)
5.85 N, 597 gf (21.04 ozf)
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:
RMP40
RMP40M
IK01, BS EN 62262:2002+A1:2021
[for glass window]
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)
1Performance 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.
2Trigger 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, machine deceleration and latency.
3These are the factory settings, manual adjustment is not possible.

2.8
RMP40 basics
Battery types 2 × 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)
Low battery indication Blue ashing LED in conjunction with normal red or green probe status
LED
Dead battery indication Constant or ashing red
Typical battery life See the table below
Spin switch on Radio switch on
Continuous use
Standby life 5% usage
(72 minutes/day) Standby life 5% usage (72 minutes/day)
240 days 150 days 290 days 170 days 450 hours
Typical battery life

3.1
System installation
Section 3, “System installation”
Installing the RMP40 with an RMI or RMI-Q
CNC machining
centre spindle
RMP40
inspection probe
RMI or
RMI-Q
interface Mounting
bracket
CNC
machine
controller
RTS probe
Cable
Workpiece
Stylus
Radio transmission does not require line-of-sight between the probe and transmitter, and will pass
through very small gaps and machine tool windows. This allows easy installation, either inside or
outside the machine enclosure.
Coolant and swarf residue accumulating on the RMP40 and RMI or RMI-Q may have a detrimental
effect on transmission performance. Wipe clean as often as is necessary to maintain unrestricted
transmission.
When operating, do not cover the probe glass window, RMI or RMI-Q with your hands, as this will
affect the performance.

3.2
System installation
Positioning the RMP40 and RMI or RMI-Q
The probe system should be positioned so that the optimum range can be achieved over the full travel
of the machine’s axes. Always face the front cover of the RMI or RMI-Q in the general direction of the
machining area and the tool magazine, ensuring both are within the performance envelope shown
below. To assist in finding the optimum position of the RMI or RMI-Q, the signal quality is displayed on
an RMI or RMI-Q signal LED.
NOTE: Installing the RMP40 and RMI or RMI-Q with the RMP40 in “radio-on” conguration
The RMP40 has a built-in “hibernation mode” (battery-saving mode) that saves battery life when the
RMI or RMI-Q is unpowered in “radio-on” (radio-off or timer-off) congurations. The RMP40 goes into
“hibernation mode” 30 seconds after the RMI-Q is unpowered (or the RMP40 is out of range). When
in “hibernation mode”, the RMP40 checks for a powered RMI or RMI-Q every 30 seconds. If found,
the RMP40 goes from “hibernation mode” to “standby mode”, ready for “radio-on”.
Performance envelope
The RMP40 and RMI or RMI-Q must be within each other’s performance envelope, as shown below.
The performance envelope shows line-of sight performance, however, radio transmission does not
require this, as any reflected radio paths will be less than the 15 m (49.2 ft) operating range.
Typical plot at +20 °C (+68 °F)
Transmission range in m (ft)
Operating and switch-on / switch-off
75°
60°
45°
30°
15°
0°
15°
30°
45°
60°
75° 90° 75°
60°
45°
30°
15°
0°
15°
45°
60°
75°
75°
60°
45°
30°
30°
45°
60° 75°
10 (33)
15 (49)
5 (16)
5 (16)
10 (33)
15 (49)
15°
0°
15°
30°
5
(16)
10
(33)
15
(49)
RMI or
RMI-Q
RMP40 probe

3.3
System installation
Preparing the RMP40 for use
Fitting the stylus
1
2
M-5000-3707
1.8 Nm – 2.2 Nm
(1.3 lbf.ft – 1.6 lbf.ft)

3.4
System installation
Installing the batteries
NOTES:
See Section 5,“Maintenance”, for a list of suitable battery types.
If dead batteries are inadvertently inserted, the LEDs will remain a constant red.
Do not allow coolant or debris to enter the battery compartment. When inserting batteries, check that
the battery polarity is correct.
After the batteries have been inserted, the LEDs will display the current probe settings, (for more
information, see page 4.1,“Reviewing the probe settings”).
1
4
2
3
Remove the battery
isolation device from the
battery compartment
before use.