Renishaw LP2 User manual

Installation and user’s guide
H-2000-5021-06-A
LP2 probe system
English
Français
Deutsch
Italiano

Installation and user’s guide
LP2 – LP2H – LP2DD – LP2H DD probes
Hard-wired transmission
1
English
Manuel d’installation et d’utilisation
Palpeurs LP2 – LP2H – LP2DD – LP2H DD
à transmission inductive ou câblée
2
Français
Installations- und Benutzerhandbuch
LP2 Messtaster mit induktiver oder
Kabelübertragung
3
Deutsch
Manuale d’installazione e d’uso
Sonde LP2 – LP2H – LP2DD – LP2H DD
Transmissione a induttanza o cablata
4
Italiano

This page is intentionally left blank

1-1
English
Installation and user’s guide
LP2 – LP2H – LP2DD – LP2HDD probes
1

1-2
© 2000-2015 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.
The publication of material within this document
does not imply freedom from the patent rights of
Renishaw plc.
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.
Renishaw part no: H-2000-5021-06-A
Issued: 10.2015

1-3Contents
Preliminary information.................................... 1-4
Introduction...................................................... 1-6
LP2 probe types .............................................. 1-7
LP2 modular system........................................ 1-8
LP2 probe moves ............................................ 1-9
Specification .................................................. 1-11
Dimensions.................................................... 1-13
Recommended connection diagram for LP2
with HSI interface .......................................... 1-14
Recommended connection diagram for LP2
with MI 8-4 interface ...................................... 1-15
Typical LP2 probe systems
Machining centres
(radio transmission)................................. 1-16
Machining centres
(optical transmission) .............................. 1-17
Machining centres
(hard-wired transmission)........................ 1-18
Machining centres
(hard-wired transmission, tool setting) .... 1-19
Lathes (radio transmission)..................... 1-20
Lathes (optical transmission) .................. 1-21
Lathes (hard-wired transmission)............ 1-22
Stylus spring pressure adjustment
– gauging force.............................................. 1-23
Stylus on-centre adjustment with probe
holders and sockets....................................... 1-24
Stylus on-centre adjustment with shank
adaptor or shank............................................ 1-25
Screw torque values ...................................... 1-26
Software requirements .................................. 1-27
Service and maintenance.............................. 1-28
Fault-finding ................................................... 1-30
Part list........................................................... 1-32

1-4 Preliminary information
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
specifications without obligation to change
equipment previously sold.
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.

1-5Preliminary information
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.
Safety
Information for the user
In all applications involving the use of machine
tools or CMMs, eye protection is recommended.
Refer to the machine supplier’s operating
instructions.
The LP2 system must be installed by a
competent person, observing relevant safety
precautions. Before starting work, ensure that the
machine tool is in a safe condition with the power
switched OFF and the power supply to the HSI/
MI 8-4 is disconnected.
Information for the machine supplier
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 documentation,
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 stop a machine’s
movement.

1-6 Introduction
Introduction
The LP2 is a compact and versatile probe for
applications on CNC lathes and machining
centres. A wide range of styli and accessories is
available to provide custom installations.
Principal applications
Horizontal lathes
Small enough to fit on a turret for part measuring,
tool setting and broken tool detection when
mounted in a suitable position.
Machining centre applications
Set-up and part measuring when spindle
mounted. Tool setting and broken tool detection
when table mounted.
Signal transmission systems
• Hard-wired – a range of hard-wired probe
sockets is available for inspection and tool
setting applications. For machining centres
with manual tool change the LP2 will fit the
MA2 probe holder.
• Optical or radio – for lathes and machining
centres. Easy installation, particularly in
retrofit applications because there is no
need for the prepared passageways required
for hard-wired transmission cables. LP2
can be used with OMP40M, OMP60M,
RMP40M, RMP60M.
Interface Unit
A hard-wired installation with LP2 may use the
HSI interface, see the HSI interface installation
guide (Renishaw part no. H-5500-8554), or the
MI 8-4 interface, see the MI 8-4 Installation and
user’s guide (Renishaw part no. H-2000-5008).
The FS1i and FS2i probe sockets with integral
interface may also be used, see the FS1i and
FS2i probe sockets data sheet (Renishaw part
no. H-2000-2073).

1-7LP2 probe types
There are four versions of the LP2 probe.
Each version is best suited to particular
applications.
LP2 – For normal setting/inspection. The
metal eyelid protects the diaphragm in a hot
chip and coolant environment.
LP2H – With higher stylus pressure for long
or heavy styli, or where there is excessive
machine vibration.
LP2DD – LP2HDD – The double diaphragm
(DD) arrangement is recommended for
grinding machines and other applications
with particle-laden coolant. The LP2HDD is a
version with a higher stylus spring pressure,
similar to the LP2H.
1. Stylus – M4 thread
2. Metal eyelid
3. Spring
4. Diaphragm
5. Rear O-ring
6. M16 thread
7. Stylus spring pressure adjustment
8. Swarf deflector – essential for LP2DD
and LP2HDD when continually exposed
to hot chips.
*
Stylus spring pressure adjustment not available
LP2DD probes are available as original equipment,
or existing LP2 probes may be converted to the DD
standard using a conversion kit.
*
8
44
7
*
LP2
LP2H
LP2HDD
1
2
3456
7
LP2DD

1-8 LP2 modular system
M4 styli
Stylus weak link
Swarf deflector
Radio or
optical
receiver
FS3
FS2
FS1
Probe sockets
Transmission module
LP2 LP2H LP2DD LP2HDD
Hard-wired transmission
Shank
MA2 probe
holder
Shank adaptor
Square holder
LPE extension bar MA 4 adapter

1-9LP2 probe moves
With a double touch sequence, the first move
finds the surface quickly, then the probe is
reversed to a position clear of the surface before
making the second touch at a slower feedrate,
thereby recording the surface position at a higher
resolution.
Probe trigger
A probe trigger signal is generated when the
probe’s stylus is driven against a surface. The
machine control records the contact position and
instructs the machine motion to stop.
Although high probing speeds are desirable, it is
essential to choose a probing velocity which allows
the machine to stop within the limits of stylus
overtravel and machine measuring capability.
Follow feedrate guidelines given by the supplier.
To ensure a trigger signal is generated, drive the
probe against the workpiece to a target beyond
the expected surface, but within the limits of stylus
overtravel.
After the probe stylus touches the surface, reverse
clear of the surface.
Single and double touch
If the probe operating sequence is based on a
single touch, then, following a gauging move, the
probe may be returned to its start point.
With some types of controllers, it is an advantage
to use a double touch method as poor repeatability
can result from using higher feedrates.
Z
1
Start position
Overtravel limits (see page 1-12)
2
X/Y

1-10 LP2 probe moves (continued)
System delays
System delays are repeatable to less than 2 µs,
and are constant in each direction in which
measurement is taken.
Delays are automatically compensated for,
provided a calibration move is made in the
same direction and at the same velocity as each
measurement move.
Calibrating a system
Calibrate the probe system at a constant
measurement speed in the measurement
direction, to automatically compensate for errors,
in the following circumstances:
1. Before the system is used.
2. When a new stylus is used.
3. If the stylus is bent.
4. To allow for machine thermal growth.
5. Where there is poor shank relocation
repeatability in the machine spindle.

1-11Specification
Variants LP2 / LP2DD LP2H / LP2HDD
Principal application Workpiece inspection and job set-up on all sizes of lathes,
machining centres and CNC grinders.
Transmission type Hard-wired, or in conjunction with optical or radio transceiver
modules
Compatible
interfaces
Hard-wired
Optical
Radio
HSI, MI 8-4, FS1i or FS2i
OMI-2 / OMI-2T / OMI-2H / OMI-2C or OSI / OMM-2
RMI-Q
Recommended styli 50 mm (1.97 in) to 100 mm
(3.94 in)
Stylus material depends on
application.
50 mm (1.97 in) to 150 mm
(5.91 in)
Stylus material depends on
application.
Weight 65 g (2.29 oz)
Sense directions ±X, ±Y, +Z
Unidirectional repeatability 1.00 µm (40 µin) 2s(see note 1) 2.00 µm (80 µin) 2s (see note 1)
Stylus trigger force
(see notes 2 and 3)
XY low force
XY high force
+Z direction
0.50 N, 51 gf (1.80 ozf)
0.90 N, 92 gf (3.24 ozf)
5.85 N, 597 gf (21.04 ozf)
2.00 N, 204 gf (7.19 ozf)
4.00 N, 408 gf (14.39 ozf)
30.00 N, 3059 gf (107.91 ozf)

1-12
NOTE: For stylus recommendations, please refer to the Styli and accessories technical specification
(H-1000-3200).
Note 1 Performance specification is tested at a standard test velocity of 480 mm/min (18.9 in/min) with a 35 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 of the LP2/LP2DD is possible, but the LP2H/LP2HDD is NOT adjustable.
Stylus overtravel limits LP2 LP2DD LP2H LP2HDD
±X / ±Y 14.87 mm
(0.55 in)
±12.5°
19.06 mm
(0.73 in)
±15°
14.87 mm
(0.55 in)
±12.5°
19.06 mm
(0.73 in)
±15°
Z 6.5 mm (0.26 in)
4.5 mm (0.18 in) when fitted with
a swarf deflector
5.0 mm (0.20 in)
4.5 mm (0.18 in) when fitted with
a swarf deflector
Mounting M16 thread, for LPE extension bars and adaptors.
Sealing IPX7 (EN/IEC 60529)
Storage temperature -10 °C to +70 °C (+14 °F to +158 °F)
Operating temperature 0 °C to +60 °C (+32 °F to +140 °F)
Specification (continued)

1-13
Dimensions given in mm (in)
Dimensions
LP2 – LP2H
LP2DD – LP2HDD
7.5 (0.30)
6.5 (0.26)
40.8 (1.61)
Ø25 (0.98)
20 (0.79)
Ø7 (0.27)
M16x1
12.5°
12.5°
M4 stylus
4.5 (0.18)
6.5 (0.26)
40.8 (1.61)
Ø25 (0.98)
20 (0.79)
Ø7 (0.27)
M16x1
15°
15°
M4 stylus

1-14
NOTES:
When connecting the
LP2 probe to the HSI
interface, please use
the connection labelled
STANDARD PROBE.
When the SSR output
is connected as
normally open (N/O),
the LP2 probe will
remain in the non-
triggered (seated) state
if the power supply is
interrupted or if the
probe is damaged.
Recommended connection diagram for LP2 with HSI interface
HSI interface
1 0 V
2 Inhibit return
3 Inhibit
4 External LED 0 V
5 External LED 10 V
6 N/O*
7 Common
8 N/C**
10 Screen
CNC controller
Standard connector (3 way)
Controller connector (12 way)
11 Supply 0 V
12 Supply 12 V – 30 V
9 12 V – 30 V out (fused 100 mA)
Status
Output
SSR
Power
input
1 Probe input +
2 Probe input -
3 Screen
0 Vdc
12 – 30 Vdc
Screen
Controller protective earth
(also referred to as PE
starpoint or earthplate)
Probe
input
I/O supply
skip input
Connect either pin 6 or pin 8,
but do not connect both wires
Probe inhibit
function, see HSI
installation guide
(Renishaw part no
H-5500-8554)
Inner spring pin
Outer spring pin
Probe holder fixed socket for
LP2 probe
Controller reference ground
Status *Normally
open
(N/O)
**Normally
closed
(N/C)
Probe
triggered
Closed Open
Probe
seated
Open Closed

1-15
Power to
interface
CNC controller
+Vdc
0 Vdc
Controller
protective
earth **
Controller
protective
ground
Green/Yellow
Optional
+Vdc from I/O supply
Skip input (G31)
-Vdc from I/O supply
MI 8-4 interface
A10 output + supply
A11 probe status output (totem pole)
A12 output - supply
B4 SELX-
B5 X-
B6 SELX+
B7 X-
B8 SELZ-
B9 Z-
B10 SELZ+
B11 Z+
A7 inspection select
A8 inhibit
A9 input resistors common
Power input
B1 +Vdc
B2 0 Vdc
B3 screen
Green/Yellow
Green/Yellow
Green/Yellow
Inspection system input + A4
Inspection system input - A5
Screen A6
Probe
input
Screen A1
Probe + A2
Probe - A3
Optional
Inspection
probe
Inspection
probe
interface
Blue
Green LP2 Probe
LP2
Machine tool
**Can also be referred to as ‘PE’, ‘starpoint’ or ‘earthplate’
For more information regarding these connections, see the MI 8-4
installation and user’s guide (Renishaw part no. H-2000-5008).
Recommended connection diagram for LP2 with MI 8-4 interface

1-16 Typical LP2 probe systems
Machining centres (radio transmission)
CNC
machine
control
RMI-Q receiver
Workpiece
LP2 probe
Stylus
Typical radio
module
CNC machine
spindle
Cable
Mounting
bracket