MIHUserGuide
Document part number H-1000-5200-09-A
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MIHdisclaimer
© 2001 - 20011 Renishaw plc. All rights reserved.
Renishaw® is a registered trademark of Renishaw plc.
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
All brand names and product names used in this document are trade names, service marks,
trademarks, or registered trademarks of their respective owners.
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FCC(USAonly)
Informationtouser(47CFR§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 installation 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
you will be required to correct the interference at your own expense.
Informationtouser(47CFR§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.
Labellingrequirements(47CFR§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.
WEEE
The use of this symbol on Renishaw products and/or accompanying documentation
indicates that the product should not be mixed with the 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 save valuable resources and prevent potential
negative effects on the environment. For more information, please contact your local waste disposal
service or Renishaw distributor.
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MIHgeneralinformation
Careofequipment
Renishaw probes and associated systems are precision tools used for obtaining precise
measurements and must therefore be treated with care.
Changestoequipment
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
The features of Renishaw’s manual indexable head and associated products are the subject of the
following patents, patent applications and registered designs.
EP 0142373 JP 2,098,080 US 4651405
EP 0293036 JP 3,018,015 US 5,088,337
EP 0392660 US Des 327854
Registered design (France): FR 278857
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MIHintroduction
MIH
Renishaw’s MIH is a compact manual indexable probe head which offers the fl exibility and time
saving normally associated with direct computer controlled (DCC) machines and motorised probe
heads.
The MIH is adjustable in two axes, both of which can be unlocked by a single thumbwheel operation.
A probe/stylus combination can be orientated to 720 different positions and, once the head is locked,
each position will be repeatable to 1 μm* (0.00004 in) (2σ). Hence the user can return to any chosen
position without having to requalify the probe/stylus tip.
The current position is shown on the integral liquid crystal display (LCD) and is constantly updated
during moves.
The programmable memory facility allows pre-datumed positions to be stored in a memory within the
head. Direction arrows shown on the LCD take the user back to any one of 20 memorised positions
which can be arranged in any order to suit a particular inspection sequence. The sequence can be
edited as required.
Probes are attached to the MIH by means of the Renishaw autojoint, allowing the user to easily
exchange probes whilst maintaining repeatability to 0.5 μm* (0.00002 in) (2σ). The autojoint is
recessed into the head, thus maximising the valuable working volume of the machine.
* Measured at 67 mm (2.64 in) from autojoint (TP6A probe with 21 mm (0.83 in) stylus).
Features
• Manually indexable in 2 axes
• Positionally repeatable to 1 μm* (0.00004 in) (2σ)
• 720 selectable positions
• LCD display
• Programmable memory function
• Simple operation
• Compact size
• Renishaw autojoint probe mounting
• No special installation required
* Measured at 67 mm (2.64 in) from autojoint (TP6A probe with 21 mm (0.83 in) stylus).
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MIHrecommendations
DO mount the head as rigidly as possible in the CMM quill.
DO ensure that the head is properly locked before attempting to use the probe to take points.
DO support probe/extension set-ups of longer than 150 mm by hand when locking or unlocking the
head.
DO disarm the probe during moves if possible. This can be achieved via the application software and
will avoid false triggers.
DO change the battery when low battery indicator is ON.
DO reposition the head by moving only one axis at a time to ensure best practise.
DO unlock and relock the head after a probe change.
DO NOT rotate the head axes by holding the probe stylus.
DO NOT move the CMM by holding the head.
DO NOT attempt to use a probe whilst the head is unlocked.
DO NOT leave the head unlocked for long periods.
DO NOT use probe extensions over 300 mm long.
DO NOT lock the head in an overtravel position.
DO NOT move the axes beyond overtravel positions.
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MIHmajorcomponents
MIH‐front
Refer to figure opposite.
1 Mounting shank
2 Lock/unlock thumbwheel
3 LCD display
4 Probe status LED
5 LCD memory programming buttons
6 Probe autojoint lock/unlock access window
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7 Renishaw autojoint probe mounting (recessed
into A axis swivel)
8 A axis zero position markers
9 B axis zero position markers
MIH‐back
Refer to figure opposite.
1 Battery housing
2 5-pin DIN connector
3 Serial number
LCDdisplay
Refer to figure opposite.
1 A axis positional data (0° to +105°)
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2 B axis positional data (-180° to +180°)
3 Low battery indicator
4 Head locked symbol
5 Rotation direction arrows
6 Position conf rmation symbol
7 Sequence store indicator
8 Memory mode indicator
9 Memory number
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MIHinstallation
Fittingthebattery
1. Move MIH to axis positions A0.0, B0.0 and lock up.
2. Unscrew housing retaining screw.
3. Open housing door.
4. Insert battery as shown (negative end first).
5. Close door and secure retaining screw (do not overtighten).
6. Reset datum (See ‘
Datum mode’page).
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NOTE: Incorrect insertion of the battery will not cause damage to the MIH.
Fittingtheprobe
1. Offer up the female autojoint with key slot facing as shown.
2. Using an S10 autojoint key, insert into access hole and locate blade in key slot.
3. Rotate clockwise to lock the autojoint.
4. Once qualified, probe/stylus combinations may be interchanged without the need to re-qualify.
5. After changing a probe, unlock and re-lock the head to ensure repeatability.
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Pinconnections
Insert Renishaw 5-pin DIN plug into socket.
1. Head LED cathode
2. Ground
3. Head LED anode
4. Probe circuit
5. Probe circuit
Quillmounting
Ensure that the head is securely mounted onto the CMM quill. Any rotational movement occurring
during use will result in a loss of repeatability of positional data.
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CAUTION: Always fit mounting shanks with the screws supplied (M3 x 5 mm (0.20 in) long). The
use of incorrect screws may cause serious internal damage to the head.
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UsingtheMIH
Unlockingthehead
Both A and B axes are unlocked by a single turn of the thumbwheel in a counter-clockwise direction.
The locked (key) symbol on the LCD will disappear. Probes/extensions longer than 150 mm should be
supported by hand when locking or unlocking the head.
Lockingthehead
To lock the head correctly after positioning, support the probe (and extension, if fitted) and turn the
thumbwheel clockwise until a positive “click” is felt. A correct “lock-up” is confirmed by the appearance
of the key symbol on the LCD. To ensure repeatability, it is important to simply support the
probe/extension during lock-up and NOT to constrain it.
NOTE: Do not leave the head unused in an unlocked position as this will shorten battery life.
Positioningthehead
Rotation of each axis is achieved against a built-in kinematic mechanism. This provides the user with
discreet 7.5° incremental positions so that the head cannot be 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 A axis is positioned by holding the probe or extension body as close to the head as possible and
rotating until the required position is reached.
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To ensure maximum repeatability, each axis should be moved separately, and should not be moved
beyond overtravel positions.
CAUTION : Do not change axis positions by holding the stylus, as this will cause damage to the
probe.
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MIHLCD/softwarefacility
A and B axis positional data is shown on an integral liquid crystal display (LCD). When the head is
unlocked and repositioned, position detectors fitted in each axis update the display which will show
live position data. Power for the LCD/software is supplied by a battery fitted within the head which
should be replaced when the low battery indicator is shown. Under normal use, the head will still
function for many days after the low battery indicator appears.
The MIH also has a user-friendly software facility which is operated by two buttons. The software
facility operates in four modes which are entered and exited by button presses and/or time-out
periods of non-use. The locked symbol and low battery indicator function in all modes.
Datummode
This mode has automatic entry when the battery is first fitted or replaced. Datum mode requires the
user to set the A and B axis position detectors to zero and must be completed successfully before the
LCD can be used. Datum mode may also be automatically entered if an error occurs in the axis
position detectors, caused by mis-use of the head. Again, correct datuming of the head must be
completed before use can commence. See Datum mode
for step-by-step instructions.
Simplemode
The software automatically enters simple mode upon completion of the datuming routine. Following
the time-out of other modes, the MIH software will always return the user to simple mode. This is a
use-only mode in which live A and B axis data will always be shown.
In addition, if the head is locked in a position which corresponds to one which has been previously
stored in memory, the memory number will be displayed on lock-up. See Simple mode
step instructions.
for step-by-
Memorymode
The user can enter memory mode from simple mode by pressing either the M+ or M- button. In this
mode the MIH memory can be programmed or used. In memory mode, chosen head positions can be
stored in up to 20 memory stores. Each position is allocated a memory number (0 to 19). In use, a
chosen memory number is selected and direction arrows on the LCD lead the user to rotate the axis
until the position stored in that memory is achieved. If the user fails to achieve the selected position,
this condition is indicated by the flashing of the direction arrows on lock-up. Once the correct position
is reached, the arrows disappear and the head position confi rmation symbol is shown.
Exit from memory mode will occur after a 10 second period of inactivity and the head will revert to
simple mode. A simple button press will return the user to memory mode. See Memory mode
by-step instructions.
for step-
Sequencemode
Sequence mode can be entered by a 5 second press of both M+ and M- buttons from simple mode.
In sequence mode, pre-memorised head positions can be arranged in any order to suit a particular
sequence of inspection. Up to 20 sequence position numbers are available and the sequence can be
edited as required. In use, the direction arrows lead the user through the pre-programmed sequence
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and will confirm that the head is locked in a correct position. The display automatically indicates the
next position in the sequence when the head is next unlocked. See Sequence
instructions.
mode for step-by-step
Conservingbatterylife
To conserve battery life, the LCD will automatically power down if the head is left in an unlocked state
and remains unused for more than 20 seconds.
The LCD will return to its exact display before the 20 second time-out upon lock-up.
Rotating either axis whilst the LCD is in this powered-down state will return the user to datum mode
upon lock-up (see Datum
This function will automatically operate if the head is left unlocked in any mode.
Stored memories and sequences remain unaffected by this function.
mode).
NOTE: Do not leave the head unused in an unlocked position, as this will shorten battery life.
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Datummode
Datummode
When the battery is first inserted or replaced, the MIH enters a datum mode routine which must be
successfully completed prior to use. The A and B axis position detectors within the head require
datuming to a zero position before the LCD will display the correct A and B axis positions. Datuming
the head will also be required if a head datum error occurs during use.
Step1
On entry into datum mode the LCD shows a datum error. Unlock the head to reset datum.
Step2
Rotate the A and B axes to their zero positions by aligning the zero position markers on both axes.
Step3
Lock the head in this position and press the M+ and M- buttons simultaneously to reset datum.
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Step4
The display will now change to show A and B axis data at A0.0, B0.0. Datum is now set and the A and
B axis displays will show positional data when the head is locked and unlocked.
Step5
Confirm that datum is correctly set by rotating each axis to its extreme positions and check that the
position data on the LCD is correct.
A axis 0° to +105° plus overtravel
B axis ±180° plus overtravel.
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Simplemode
Following insertion of the battery and datuming of the head, the MIH is now ready to be used in
simple mode. All data shown in the A and B axis positions on the LCD will be “live”.
Example: To use the MIH repeatably in positions A0.0, B0.0 and A105.0, B-180.0 (see steps 1 - 3
below).
Step1
Position the head to A0.0, B0.0 and lock in position. Qualify the probe tip on your CMM in the normal
manner. The stored tip number should be noted, together with the corresponding A and B axis
positions on the MIH.
Step2
Unlock the head and rotate the A and B axes until the required position is reached - in this example.
A105.0, B -180.0
If overtravel in either axis occurs, the ‘O-t’ symbol will appear in the axis data on the LCD. Rotate the
head to a valid position.
CAUTION: Do not attempt to lock the head in an overtravel position.
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Step3
Lock the head in a valid position, A105.0, B-180.0. Qualify the probe tip on your CMM in the normal
manner. The stored tip number should be noted, together with the corresponding A and B axis
positions on the MIH.
The MIH can now be used in either of the two pre-qualifi ed positions (A0.0, B0.0 or A105.0, B-180.0)
without the need to re-qualify the probe tip after each move. Simply unlock the head, move to the
required position and lock up. The previously stored tip data for that head position can be recalled
from the CMM computer software ready to take points.
The head can be used in this way in up to 720 repeatable positions. The number of positions which
are to be used will be dictated by the workpiece requiring inspection, but in some cases may be
restricted by the number of storage positions for tip data available on your CMM software. Please
consult your CMM supplier for further details.
Attempting to move the head axes whilst locked will cause damage and may result in movement of
the axis position detectors in severe cases. Should this occur, the MIH software will signal an axis
error message and will ask for a datum reset when unlocked. See step 2 of the datum
details of this routine.
mode page for
If the head is in a locked position which has previously been stored within the head’s programmable
memory function, the memory number corresponding to that position will show on the LCD screen
upon lock-up. For further details on its use see the memory function page.
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Memorymode
Memorymode
When the battery is first fitted, all memory locations are pre-set to A0.0, B0.0. Pressing either the M+
or M- button when in simple mode activates memory mode.
Step1
In this example the head is positioned and locked at A0.0, B0.0 in simple mode.
Step2
The M+ or M- button is pressed to activate memory mode. Memory location 1 is shown on the LCD
and the axis data stored in that location is shown in the A and B axis position displays. Because the
head is at this position (A0.0, B0.0), the direction arrows do not show, only the position confirmation
block shows. If no button presses or head lock/unlock occur within 10 seconds, the LCD reverts to
simple mode.
M1 now = A0.0, B 0.0
Step3
The head is unlocked, repositioned and locked at A30.0, B30.0 in simple mode.
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Press M+ to activate memory mode.
Step4
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Memory location M1 is displayed (A0.0, B0.0) since this was the last memory number used.
As the head is not in this position, the direction arrows appear showing the direction in which each
axis must be rotated to achieve the position stored in M1 (A0.0, B0.0).
Step5
To store A30.0, B30.0 in memory location M2, press M+ and the memory number will increment until
M2 is reached.
Currently A0.0, B0.0 is stored in M2 and this is displayed together with the flashing direction arrows
showing how this position can be reached.
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Step6
Pressing the M+ and M- buttons simultaneously for longer than half a second will store A30.0, B30.0
in memory location 2.
The display will then “blink” to show that the position data is stored in the memory.
This is confirmed by A30.0, B30.0 appearing in the A and B axis displays and the direction arrows
disappearing, leaving only the confirmation block.
M2 now = A30.0, B30.0
Step7
To return the head to a previously memorised position M1 (A0.0, B0.0) press M- to decrement the
memory number to M1. The direction arrows flash to show the direction moves required to reach that
position and the axis data stored in M1 (A0.0, B0.0) is displayed.
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Step8
Unlock the head to display live positional data. The direction arrows remain but stop flashing.
Step9
Rotate the A and B axes in the directions indicated by the arrows until both arrows disappear and the
position confirmation block comes on. This confirms that the head is now in the position stored in the
memory location indicated.
NOTE: If you overshoot the target position chosen in either axis, the direction arrows will lead
you back to the required position.
If the head is locked in an incorrect position, the direction arrows will flash. The arrows will stop
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flashing after 10 seconds and the display will return to simple mode showing “live” position data.
If either button is pressed, the screen will return to the last used memory display.
The memory numbers are incremented or decremented by pressing either the M+ or M- buttons
respectively. Pressing either button and keeping it pressed will cause the memory numbers to
scroll up or down at the rate of two per second.
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Sequencemode
When the battery is first inserted, sequence step 1 contains the contents of memory 1, sequence step
2 contains the contents of memory 2 and so on up to sequence step 19. Step 20 contains an end of
sequence marker (E).
By pressing the M+ and M- buttons simultaneously (for 5 seconds) when the head is locked in simple
mode, sequence mode is entered.
The display gives the choice to either use the existing sequence (press M- button) or edit the
sequence to create a new one (press M+). If no choice is made within 5 seconds, the display will
return to simple mode.
Step1
Pressing the M+ button to edit, the sequence is entered at step 1. The existing contents of this step
(in this case memory 1) are also displayed.
Step2
Pressing M+ or M- will increment or decrement the sequence step numbers and the display will show
the memory number stored in each sequence step. Keeping the M+ or M- buttons pressed will scroll
through the sequence steps at the rate of two per second.
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Step3
Once the sequence step to be changed is chosen (in this example step 3 currently containing memory
number 3), pressing the M+ and M- buttons simultaneously for between half a second and 3 seconds*
changes the display.
The S character disappears and the M character will be shown. This confirms that the sequence step
chosen (step 3) is now frozen, and that the new contents can be chosen by pressing either the M+ or
Mbutton to scroll up or down through the memory numbers.
Step4
Once the memory number to be stored in sequence step 3 has been chosen (in this example memory
5), pressing the M+ and M- buttons simultaneously for between half a second and 3 seconds* will
store memory 5 in sequence step 3. This is confirmed by a store (Sto) message appearing on the
display. The M character disappears and the S character reappears, confi rming that the function of
the M+ and M- buttons has been transferred back to selecting sequence steps.
* If the buttons are held for longer than 3 seconds, the display will revert to the ‘End USE’ screen (see
step 7).
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Step5
The sequence now has three steps -
step 1 containing memory 1
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step 2 containing memory 2
step 3 containing memory 5.
To end the sequence, the end of sequence marker (E) must be placed in sequence step 4. Pressing
the M+ button will increment the sequence to step 4 and the display will show the current contents as
memory 4.
Step6
Press M+ and M- simultaneously for between half a second and 3 seconds. This changes the display.
The S character is replaced by the M character as before.
Press and hold either the M+ or M- button until the end of sequence marker (E) is displayed. This is
positioned between M19 and M1.
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Store E in sequence step 4 by pressing the M+ and M- buttons simultaneously for between half a
second and 3 seconds.
The sequence is now complete and is as follows -
Step 1 (M1), Step 2 (M2), Step 3 (M5), Step 4 (E).
Step 7
To exit from editing a sequence, press the M+ and M- buttons simultaneously for longer than 3
seconds. The display will give a choice of either ending sequence mode or using the sequence.
Pressing the M- button or taking no action for 5 seconds will return the display to simple mode.
Pressing the M+ button enables use of the stored sequence.
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NOTE: To reset the sequence back to its original form (step 1containing memory 1, step 2
containing memory 2, etc), simply place the end of sequence marker (E) in sequence step 1
during sequence editing.
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UsingasequencewithMIH
When using a sequence, the only requirement is to position the MIH following the axis direction
arrows and lock up once the correct position is reached. On unlock, the sequence will automatically
increment to the next step and the direction arrows will indicate the direction each axis must be
rotated to, in order to achieve the position stored in that step.
Step1
To use a sequence, either press the M- button from the ‘USE Ed’ display or the M+ button from the
‘End USE’ display. Either of these actions will automatically start the sequence at step 1. The memory
contents of sequence step 1 are displayed and the flashing direction arrows indicate the direction in
which each axis must be rotated to achieve the position stored in sequence step 1. If the head is
already in this position, the position confirmation block will be displayed.
If the head is not in this position, unlock the head and follow the direction arrows. The display will
show live positional data and the position confirmation block will confirm when the correct position has
been reached.
Step2
Locking the head in this position returns the display to show the sequence step number and its
contents. The corresponding probe tip number can now be selected and points taken.
Step3
When the head is next unlocked, the direction arrows will show the way to achieve the position stored
in sequence step 3. On locking up in the correct position, the display will show sequence step 3 and
its memory contents, along with the position confi rmation block.
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If the head is locked in an incorrect position, flashing direction arrows will instruct the user to unlock
and try again.
Step4
If the head is accidentally unlocked in a sequence step position before points can be taken, simply relock the head and press the M+ or Mbuttons to step through the sequence until the correct step is
reached.
When the last step in the programmed sequence is reached, the sequence will automatically loop
back to the fi rst step. This will only occur if the end of sequence marker (E) has been correctly placed
during sequence editing.
Step 5
Pressing the M+ and M- buttons simultaneously for longer than 3 seconds will give the choice to
either re-use the sequence (press M+) or end using sequence mode (press M-).
Pressing M+ will take the user back to step 1 in the sequence. Pressing M- or taking no action for 5
seconds will transfer the display back to simple mode.
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MIHsummaryofbuttonoperation
Datummode
Button operation Effect
[M+] or [M-] [No change]
[M+] and [M-] Simple mode entered
Simplemode
Button operation Effect
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[M+] or [M-] Memory mode entered
[M+] and [M-] held for longer than 5 seconds Sequence mode entered
Memorymode
Button operation Effect
[M+] Increments memory number
[M-] Decrements memory number
[M+] held for longer than 0.5 seconds Scrolls up memory number
[M-] held for longer than 0.5 seconds Scrolls down memory number
[M+] and [M-] held for longer than 0.5 seconds Stores current position
[No action] for longer than 10 seconds Simple mode entered
Sequencemode
Selectsequencemodefunction
Button operation Effect
[M+] Edit sequence mode entered
[M-] Use sequence mode entered
[No action] for longer than 5 seconds Simple mode entered
Selectsequencestepinsequenceedit
Button operation Effect
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[M+] Increments step number
[M-] Decrements step number
[M+] held for longer than 0.5 seconds Scrolls up step number
[M-] held for longer than 0.5 seconds Scrolls down step number
[M+] and [M-] held for longer than 0.5 seconds Selects memory number routine
[No action] for longer than 3 seconds Exits edit sequence mode
Selectmemorynumberinsequenceedit
Button operation Effect
[M+] Increments memory number
[M-] Decrements memory number
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[M+] held for longer than 0.5
seconds
[M-] held for longer than 0.5
seconds
[M+] and [M-] held for longer
than 0.5 seconds
[No action] for longer than 3
seconds
Scrolls up memory number
Scrolls down memory number
Stores memory number in current sequence step and reutnrs to
select sequence step
Exits edit sequence mode
Usesequencemode
Button operation Effect
[M+] Increments step number
[M-] Decrements step number
[M+] held for longer than 0.5 seconds Scrolls up step numbers
[M-] held for longer than 0.5 seconds Scrolls down step numbers
[M+] and [M-] held for less than 3 seconds [No change]
[M+] and [M-] held for longer than 3 seconds Exits edit sequence mode
Exitsequencemode
Button operation Effect
[M+] Use sequence mode entered
[M-] or [No action] for longer than 5 seconds Simple mode entered
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MIHaccessories
MAPS(ManualAutojointProbeStand)
The Renishaw manual autojoint probe stand (MAPS) is a low-cost storage rack for up to six
autojointed probe/extension combinations. As a complementary product to the MIH, MAPS allows the
user to manually insert or remove pre-datumed probe/extension set-ups for protective storage or use
with the MIH. MAPS can be either wall-mounted or bolted directly to the CMM table for easy access.
For further information on MAPS, see user guide, part number H -1000-5300.
Autojointextensions/adaptors
A large range of autojoint probe extensions/adaptors are available from Renishaw providing easy
access to the deepest of features.
Utilising the patented Renishaw autojoint, probing set-ups can be simply locked onto the MIH without
the need to requalify each time, yielding maximum fl exbility and valuable time saving.
Key
1. AM1
2. MIH
3. PAA3
4. PAA2
5. PAA1 Adaptor
6. PEM1
7. PEL3
8. PEL2
9. PEL1
10. TP2
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11. TP2
12. TP6
13. TP6A
14. M2/3 adaptor
15. M2 thread styli
16. M3 thread styli
Shanks
Renishaw provide an extensive range of machine mounting shanks to fi t most makes of CMM.
Please take care when mounting the MIH with a parallel shank, as any rotational movements will
invalidate any stored data.
CAUTION: Always fi t mounting shanks to the MIH by using the screws supplied (M3 x 5 mm
(0.20 in) long). The use of longer screws will cause serious internal damage to the head.
AM1adjustmentmodule
The AM1, Part No. A-1026-0320, is a compact adjustment module for accurately aligning the probe
heads with the CMM axes and/or the Renishaw autochange rack. In addition, an in-built quick release
bayonet mechanism allows the head to be removed for storage and replaced without the need to realign. Limited overtravel protection is also provided by the AM1.
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MIHdimensions
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MIHspecification
Mechanicalspecification
Probe mounting Renishaw autojoint
Autojoint repeatability (at the stylus tip) (2σ) 0.5 μm (0.00002 in) *
Page 37 of 44MIH User Guide
Probe status indicator
Swept radius
MIH positional repeatability (at the stylus tip) (2σ)
Accuracy of step spacing from theoretical position in each
axis (at the stylus tip)
Total angular movement A Axis 0° - 105° in 7.5° step = 15
Total angular movement B Axis ±180° in 7.5° steps = 48
Total number of positions 720
Support limit of head (unlocked)
Maximum extension length
Lock/unlock mechanism
LED
62 mm (5.44 in) *
1 μm (0.00004 in) *
±0.3 mm (±0.012 in) *
positions
positions
150 mm (5.91 in) using PAA2
and TP6
300 mm (11.81 in) using PAA3
and TP6
Single thumbwheel rotation
Weight
Working temperature range
* Using a TP6A fi tted with a 21 mm (0.83 in) stylus
Electricalspecification
Probe Connector Renishaw 5-pin DIN connector
Battery type to power
LCD
Battery type Part number
Varta V28PX P-BT03-0011
Alternatives:
Duracell lithium
6 volt silver oxide alkali manganese (Ø12 mm [0.48 in] x 25 mm [0.98
in])
580 g (1.3 lb)
10 °C - 40 °C (50 °F - 105 °F)
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Kodak lithium
Varta lithium
CAUTION: Care must be taken when disposing of batteries. DO NOT INCINERATE.
Batterylife
Typical battery life (10 minutes/day unlock time):
Before low battery warning 40 weeks
After low battery warning 11 days
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Battery life with heavy usage (20 minutes/day unlock time):
Before low battery warning 26 weeks
After low battery warning 8 days
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MIHtroubleshooting
Page 39 of 44MIH User Guide
Observation Possible causes
Poor repeatability
(probe changing)
Poor repeatability
(probe changing)
Poor repeatability
(probe changing)
Poor repeatability
(probe changing)
Poor repeatability
(head positioning)
Poor repeatability
(head positioning)
Loose mounting Ensure shank mounting screws are thight and shank
Dirty or damaged
autojoint
Autojoint lockprocedure incorrect
Probe extension too
long
Loose mounting.
Head lock-up
procedure incorrect
with long extensions
Checks/Remedial Action
is securely mounted in machine quill
Inspect autojoint probe connection contacts for
damage and contamination.
Clean with a stiff brush if necessary
Ensure probe setup is locked onto the head correctly
using the autojoint key
Ensure maximum extenstion bar (300 mm) isnot
exceeded and the extensions longer than 150mm are
supported on lock up
Ensure shank mounting screws are tight and shank is
securely mounted in machine quill
Ensure maximum extenstion bar (300 mm) isnot
exceeded and the extensions longer than 150mm are
supported on lock up
Incorrect LCD
function
No LCD function No battery present or
Unexpected
software modes
entered
Unexpected
software modes
entered
No probe signal
and/or no probe
status LED
No probe signal
and/or no probe
status LED
Battery power low
battery inserted
incorrectly
Buttons not pressed
simultaneously
Time-out exceeded
Cabling faulty/not
connected
Probe/extension bars
faulty
IF low battery indicator is shown, replace battery. If
not, head may be faulty (see note below)
Ensure battery is present and inserted correctly
Ensure simultaneous operation when appropriate (e.g.
to enter Sequence Mode, if buttons are not pressed
simultaneously, Memory Mode is entered)
On timeout (no button presses or head momevemnt
for a preiod of time) the LCD will revert to Simple
Mode if locked or to a power down state if unlocked
Check continuity of cabling from head to interface
machine control
Check probe/extensions are working correctly by
exchange.elimination/continuity check - if faulty return
to Renishaw Service Centre for repair
No probe signal
and/or no probe
status LED
Probe interface
faulty/not connected
Ensure correct connection of interface/machine control
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When inserting
battery, self test
mode is entered
NOTE: The MIH contains no user serviceable parts and should be returned to Renishaw if
suspected faulty.
Checks/remidial action:
• Ensure shank mounting screws are tight and shank is securely mounted in machine machine quill
• Inspect autojoint probe connection contacts for damage and contamination. Clean with a stiff brush if
necessary.
• Ensure probe set-up is locked onto probe head correctly using the autojoint key.
• Ensure maximum extension bar of 300 mm (11.81 in) is not exceeded and extensions longer than
150 mm (5.91 in) are supported on lock-up.
• If low battery indicator is shown, replace battery. If not, head may be faulty (see note above).
Button pressed during
battery insertion
Re-insert battery ensuring buttons are not pressed OR
press both buttons simultaneously 3 times to enter
Datum Mode
• Ensure battery is present and is inserted correctly (refer to section 4, ‘Installation’ for correct
procedure).
• Ensure simultaneous operation when appropriate (e.g. to enter sequence mode, if buttons are not
pressed simultaneously, memory mode is entered).
• On time-out (no button presses or head movement for a period of time) the LCD will revert to simple
mode if locked, or power down if unlocked.
• Check continuity of cabling from head to interface/machine control (refer to installation section for
pin connections).
• Check probe/extensions are working correctly by exchange/elimination/continuity check - if faulty
return to Renishaw service centre for repair.
• Ensure correct connection of interface/machine control.
• Re-insert battery ensuring buttons are not pressed or press both buttons simultaneously three times
to enter datum mode.
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MIHselftest
NOTE: These tests are for diagnostic purposes only.
The self test function can only be entered by pressing the M+ or M- button whilst the battery is being
inserted. If this should happen accidentally, either refi t the battery or step through the function by
pressing both M+ and M- buttons three times to enter datum mode.
LCDtest
This test cycles round the LCD displaying each segment in turn.
Pressing the M+ button will display all LCD segments simultaneously.
Pressing the M- button will display the MIH software version number.
Press the M+ and M- buttons simultaneously to transfer to the encoder test.
Encodertest
The head should be locked during this test.
Any positional error within the A or B axis encoders will be detected and displayed in the self test.
Press M+ and M- simultaneously to transfer to the battery test.
Batterytest
This function is used by Renishaw when setting the low battery indicator threshold.
To step through this function, press the M+ and M- buttons simultaneously to transfer to datum mode.
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MIHmaintenance
The MIH contains no user serviceable parts.
The MIH may be cleaned by wiping with a dry, lint-free cloth.
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