Renishaw MIP User manual

User’s guide
H-1000-5210-03-G
MIP

© 2001 - 2006 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
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 is a trademark 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.
Renishaw part no: H-1000-5210-03-G
Issued: 11 2006

1
MIP
user’s guide

2
Care of equipment
Renishaw probes and associated systems are precision tools used for
obtaining precise measurements and must therefore be treated with
care.
Changes to equipment
Renishaw reserves the right to improve, change or modify its hardware
or software without incurring any obligations to make changes to
Renishaw equipment previously sold.
Warranty
Renishaw plc warrants its equipment provided that it is installed
exactly as defined in associated Renishaw documentation.
Prior consent must be obtained from Renishaw if non-Renishaw
equipment (e.g.interfaces and/or cabling) is to be used or substituted
for Renishaw equipment. Failure to comply with this will invalidate the
Renishaw warranty.
Claims under warranty must be made from authorised service
centres only, which may be advised by the supplier or distributor.
Patents
Features of Renishaw’s manual indexable probe and of other manually
indexable probes and probe heads are the subjects of the patents and
patent applications listed below:
EP 0392660 JP 3,018,015 US 5,088,337
Care of equipment

3
Contents
Contents
1 Introduction ...................................................................................4
2 Dos and don’ts..............................................................................5
3 Major components.........................................................................6
4 Installation.....................................................................................9
5 Using the MIP..............................................................................11
6 Technical specification ................................................................14
7 Troubleshooting guide.................................................................17
8 Accessories.................................................................................20

4
1 Introduction
1.1 The MIP
The Renishaw manual indexable probe (MIP) is a compact probe and
indexable probe head combination, designed specifically for users of
small manual CMMs. Repeatable positioning at 15° steps throughout
both axes of adjustment allows the user to return to pre-datumed
positions without the need to re-datum the stylus tip each time. The
built-in touch trigger probe unit with sub-micron repeatability will allow
precision measurement yet is of robust construction ideal for manual
CMM operation.
1.2 Features
* Precision touch trigger probe
* 2 axes of adjustment
* Repeatable positioning
* 168 selectable positions in 15° steps
* Easy operation
* Compact size
* Simple installation
Introduction

5
2 Dos and don’ts
2.1 Do
Do mount the MIP as rigidly as possible in the CMM quill.
Do ensure that the MIP axes are correctly locked before taking probe
points.
Do reposition the probe by moving only one axis at a time.
Do fully unlock the axes before attempting to reposition the probe.
Do ensure all stylus joints are clean and secure.
2.2 Do not
Do not attempt to move the probe with the axes locked.
Do not position the probe by holding the stylus.
Do not use the probe when the axes are unlocked.
Do not attempt to rotate axes beyond the overtravel stops.
Do not move the CMM by holding the MIP.
Dos and don’ts

6Major components
3 Major components
3.1 Front view (see figure 1)
1 Mounting shank (3 screws, supplied)
2 Lock/unlock lever
3 Probe status LED
4 B axis position marker
5 B axis position angles
6 A axis position window
7 A axis position angles
8 Touch trigger probe unit
9 Stylus holder (M3)
10 Stylus
11 S7 Stylus tool (supplied)

7
Major components
1
2
3
4
5
6
7
8
9
10
11
Figure 1 - MIP (front view)

8Major components
Figure 2 - MIP (rear view)
3.2 Rear view (see figure 2)
12 5 pin DIN probe signal connector
13 Serial number
14 Access to probe trigger force adjustment
15 S3 Trigger force adjustment tool (supplied)
12
13
14
15

9
Installation
4 Installation
4.1 Shank mounting
Always ensure that the mounting shank is securely fitted to the MIP
using the three screws supplied.
CAUTION: Always fit mounting shanks with the screws
supplied (M3 x 5 mm (0.20 in) long).
4.2 Stylus fitting
The MIP is designed to use the Renishaw range of M3 threaded styli.
Renishaw M2 threaded styli may also be fitted using the SA3 M3 to
M2 Stylus Adaptor. Always fit and tighten styli securely to the probe
using the S7 Stylus Tool provided. Tightening of styli using any other
means (e.g.spanners, drill bits etc.) may cause internal damage to the
probe mechanism.
All stylus joints should be clean and free from dirt or debris.
!

10 Installation
Figure 3 - Probe signal connection
4.4 CMM mounting
Ensure that the MIP mounting to the CMM quill is rigid. Any
movement during use will result in a loss of repeatability of positional
data. If the MIP is removed from, or repositioned in the quill, then
redatuming of each probe position will be required before further use.
4.3 Probe signal connection (see figure 3)
Insert Renishaw 5 pin DIN plug into socket as shown.
Pin connections -
1 LED cathode
2 Ground
3 LED anode
4 Probe circuit
5 Probe circuit
1
4
53
2

11
Using the MIP
5 Using the MIP
5.1 Locking and unlocking (see figure 4)
Both A and B axes are unlocked and re-locked by a single operation of
the lock lever.
Always ensure that the lock lever is positioned at its extremes of travel
during both lock and unlock operations.
Failure to achieve this may result in poor positional repeatability on
lock-up, or damage to the indexing mechanism during axis movement.
Figure 4 - Locking and unlocking
Unlock
Lock

12 Using the MIP
5.2 Indexing the probe
Rotation of each axis is achieved against a built in indexing
mechanism. This provides positive steps at 15° increments to prevent
the MIP from being locked in a non-repeatable position.
The B axis is positioned by holding the lower housing and rotating until
the required position is reached. The angular position can be read
from the axis label against the B axis position marker.
The A axis is positioned by holding the probe unit and rotating until
the required position is reached. The angular position is read from the
axis label and the value is displayed in the A axis position window.
To ensure maximum repeatability each axis should be positioned
separately and should not be moved beyond the overtravel stops.
CAUTION: Do not change axis positions by holding the stylus
as this will cause damage to the probe.
5.3 Probe trigger force adjustment (see figure 5)
The probe trigger force on the MIP is preset by Renishaw to give
optimum performance and high reliability using a wide range of stylus
configurations. Unnecessary adjustment of the trigger force can lead
to a reduction in probe performance and reliability.
It may, however, be necessary to use the MIP with a long or heavy
stylus configuration in order to gain access to a feature. This can
lead to unwanted triggering of the probe during movement. This
can be overcome by increasing the trigger force. The trigger force
adjustment is accessed via a hole in the back of the MIP with the A
axis positioned at 90°.
!

13
Using the MIP
Adjustment must be carried out using only the S3 1.5A/F hexagonal
wrench provided. Clockwise rotation increases the trigger force. Anti-
clockwise rotation reduces trigger force.
It is recommended that a gram gauge is used when adjustment of the
trigger force is required (see section 8).
5.4 Using the probe
The MIP requires that each required probing position is to be qualified
prior to use. Following this initial qualification repeatable indexing
allows the probe to be returned and locked in any pre-qualified
position without the need for re-qualification.
It is recommended that the probe positions are qualified according to
the procedure given by the CMM manufacturer.
Figure 5 - Stylus trigger force adjustment
Increase
Decrease

14 Technical specification
6 Technical specification
6.1 Probe specification
Probe status indication LED
Positional repeatability
(2σ)1.5 µm (0.00006 in)*
Swept radius 54 mm (2.13 in)*
Angular
movement: A axis 0° to 90° in 15° increments (7
positions)
B axis ±180° in 15° increments (24 positions)
Total number of
positions 168
Lock/unlock mechanism Single lever rotation
Maximum recommended
stylus length 60 mm (2.36 in) shorter lengths will
give better performance
Probe sense direction ±X, ±Y, +Z
Stylus
overtravel: XY ±20°
Z+6 mm (0.24 in) at 0.12 N (12 g /
0.42 oz) trigger force
Cable connection Renishaw 5 pin DIN type connector
Interface Compatible with standard Renishaw
probe interfaces
Mounting to CMM Any standard Renishaw shank
* Specified at 21 mm (0.38 in) stylus, 480 mm/min (18.9 in/min)
probing speed, 0.11 N to 0.13 N (11 gf to 13 gf / 0.39 oz to
0.46 oz) trigger force.

15
Technical specification
Weight 200 g (7.05 oz)
Working temperature
range 10 °C to 40 °C (50 °F to 104 °F)
Unidirectional
repeatability of probe
(2σ)
0.35 µm (0.000014 in)*
XY pretravel variation ±1 µm (0.00004 in)*
Trigger force adjustment 0.1 N to 0.3 N (10 gf to 30 gf / 0.36 oz
to 1.05 oz)
* Specified at 21 mm (0.38 in) stylus, 480 mm/min (18.9 in/min)
probing speed, 0.11 N to 0.13 N (11 gf to 13 gf / 0.39 oz to
0.46 oz) trigger force.

16
Ø48 mm
43 mm
76 mm21 mm
5.7 mm
R54 mm
M3
A axis
0° - 90°
B axis
±180°
Figure 6 - MIP dimensions
Technical specification

17
Troubleshooting guide
7 Troubleshooting guide
7.1 MIP unit
Observation Possible causes Checks / remedial actions
Poor measuring
performance Loose mounting. Ensure shank mounting
screws are tight and mounting
to CMM is secure.
Problem with
probe unit. See section on probe unit. Diagnosis of the probe unit
should be carried out with
axes correctly locked and
without indexing between
probe points.
Problem with
indexing unit. See section on indexing unit. Diagnosis of indexing
unit should only be carried
out following confirmation
of satisfactory probe
performance.
No probe signal
and/or no probe
status LED.
Cabling faulty/
not connected. Check continuity of cabling from head to interface/
machine control.
Probe interface
faulty/not
connected.
Ensure correct connection of
interface/machine control.

18 Troubleshooting guide
7.2 Probe unit
Observation Possible causes Checks / remedial actions
Poor measuring
performance Stylus
configuration too
long or not rigid.
Use shorter/stiffer stylus
configuration.
Poor stylus
assembly. Ensure stylus joints are kept to a minimum and that all
joints are clean and secure.
Contamination/
damage of stylus
ball.
Inspect for damage, clean
thoroughly with solvent.
Trigger force set
too high. Adjust trigger force to minimum to ensure reliable
triggering.
Too few points
taken for datum/
measurement.
Take larger number of points
on both datum and feature
measurement.
Unwanted
triggering
during probe
or CMM
movement.
Trigger force set
too low/ stylus
configuration too
heavy.
Increase trigger force / reduce
mass of stylus configuration.
Probe fails to
rearm after
trigger.
Trigger force set
too low/ stylus
configuration too
heavy.
Increase trigger force/reduce
mass of stylus configuration.
Probe reseat
failure. Retrigger probe. If this problem persists please return
to Renishaw for service.