TESA MH3D User manual

User's Manual
MH3D
©2004 TESA Switzerland All Rights Reserved. Page 0-1
U S E R ' S M A N U A L
English

©2004 TESA Switzerland All Rights Reserved.
Page 0-2
User's Manual
MH3D

User's Manual
MH3D
©2004 TESA Switzerland All Rights Reserved. Page 0-3
Contents
CHAPTER 1 - Introduction ................................................................1-1
Foreword .........................................................................................1-3
Warranty .........................................................................................1-4
Software Warranty ..........................................................................1-4
Warranty Service.............................................................................1-5
GeneralSafety .................................................................................1-6
Description ......................................................................................1-7
Dimensions ....................................................................................1-11
Specifications ................................................................................1-12
CHAPTER 2 - Construction ...............................................................2-1
Base .................................................................................................2-3
Work Table .....................................................................................2-4
Y-Rails ............................................................................................2-5
Bridge ..............................................................................................2-6
ZX Carriage ....................................................................................2-7
Z Rail ..............................................................................................2-8
Air Control and Filter......................................................................2-9
AirSystem.....................................................................................2-10
Air Bearings ..................................................................................2-11
MeasuringSystem .........................................................................2-12
ReferenceOffsets ..........................................................................2-13
Probes............................................................................................2-14
TESASTAR Probe ........................................................................2-14
TESASTAR_I Probe.....................................................................2-14
ElectronicSystem ..........................................................................2-15
Controller ......................................................................................2-16
MH3D Rear Connections ..............................................................2-17
MH3D Control Box.......................................................................2-17
Cables............................................................................................2-18
CHAPTER 3 - Operation...................................................................3-1
Operator Safety ...............................................................................3-3
Using a Desk Mouse........................................................................3-6
Using a ZMouse ..............................................................................3-7
Starting & Stopping ........................................................................3-8
MovingtheAxes ...........................................................................3-10
HomingtheMachine .....................................................................3-11
TheInspection Process ..................................................................3-12
ProbeInstallation...........................................................................3-13
Measuring With a Ball Probe ........................................................3-14

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User's Manual
MH3D
Contents
ProbeCompensation......................................................................3-15
Measuring With an Electronic Probe ............................................3-16
Touch Trigger Probe Repeatability ...............................................3-17
UsefulProbeDimensions ..............................................................3-19
GoodMeasurementTechniques ....................................................3-21
CHAPTER 4 - Maintenance ...............................................................4-1
Machine Maintenance & Safety ......................................................4-3
General Safety Practices..................................................................4-3
TheMachine'sEnvironment ............................................................4-3
Electronics .......................................................................................4-4
Covers .............................................................................................4-4
Pneumatics ......................................................................................4-4
MaintenanceIntervals .....................................................................4-5
Daily or Every 8 Hours ...................................................................4-6
Monthly or 165 Hours.....................................................................4-6
Every Three Months or 500 Hours..................................................4-6
MaintenanceLog .............................................................................4-7
MachineTroubleshooting ................................................................4-8
Cleaning Glass Scales ...................................................................4-11
Changing the Air Filter..................................................................4-12
CHAPTER 5 - Glossary......................................................................5-1
CHAPTER A - Video Optical Probe ................................................A-1
Installation......................................................................................A-3
MountingConfiguration.................................................................A-4
ConnectingDiagram.......................................................................A-5
Adjustments.................................................................................... A-6
Qualification................................................................................... A-8
Measuring.......................................................................................A-9

User's Manual
MH3D
©2004 TESA Switzerland All Rights Reserved. Page 1-1
Introduction
CHAPTER 1
Introduction

©2004 TESA Switzerland All Rights Reserved.
Page 1-2
User's Manual
MH3D

User's Manual
MH3D
©2004 TESA Switzerland All Rights Reserved. Page 1-3
Foreword
The TESA MH3D™Series Coordinate Measuring Machines represent the accu-
mulated experience of over 160 years in the design and manufacture of dimen-
sionalmeasuring equipment. This experience, combined withmany mechanical,
pneumatic, and electronic features, has produced a machine which meets the most
rigid requirements for the control of dimensional quality.
The MH3D is designed to meet production needs and to produce speedy, accurate
and economical verification of a variety of work pieces.
Imaginative engineering concepts make the MH3D a practical choice for small
shops as well as for large operations. Such innovative design as a completely
weight balanced structure and a fully supportive air bearing system allow the
attainment and maintenance of high accuracies. Combining these features with
the many optional accessories and software packages available, allows the most
difficult measurements to be performed on a time-saving production basis.
Since minor changes may be made periodically by TESA to improve machine
performance, some components of your particular system may differ from the
description in this manual. In such cases, supplementary information will be
furnishedasneeded.
This manual has been prepared to provide the proper procedures to be followed in
the installation, operation, and maintenance of the MH3D. Other manuals and
information are also provided where required.
CAUTION
This manual should be read in its entirety by all supervisory and
operating personnel prior to installation of the MH3D. This will
help to prevent human injuries as well as damage to the machine
components and will assure proper installation, operation and
maintenance.

©2004 TESA Switzerland All Rights Reserved.
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User's Manual
MH3D
Warranty
We warrant that within twelve (12) months from the date of shipment, if the
product manufactured by us and sold by us under this contract is in the posses-
sion of the original buyer (or lessee) from us (or from an authorized distributor),
we will replace or repair, at our option, free of charge, any part or parts which
upon examination we find defective in workmanship or material, provided that,
on our request, the product or parts thereof are returned to our plant, along with
satisfactory documentation that the product has been installed, used, and main-
tained in accordance with instructions in the User’s Manual and has not been
subjected to abuse.
We warrant that within twelve (12) months from the date of shipment, if the
software sold under this contract is in the possession of the original buyer (or
lessee), we will replace or correct, at our option, free of charge, any modules or
programs which upon examination we find defective in workmanship or func-
tion, provided that, on our request, the modules or programs are returned to our
plant and, provided further, that there is satisfactory documentation that the
software has been installed, maintained and operated in accordance with instruc-
tions in the User’s Manual, and provided further that there is satisfactory docu-
mentation from the customer that a software defect exists.
In addition, there may be specified Occupational Safety & Health Standards
Warranties which, if applicable to the product, are set out in the attached sched-
ule and incorporated by reference and subject to the provision hereof.
We shall not be responsible for any expense or liability for repairs due to the
making of or which result from any additions or modifications upon the product
without our written consent and approval or which expense or liability for
repairs results from a failure to follow the Manufacturer’s Preventive Mainte-
nance Schedule as set forth in this Manual.
THIS WARRANTY IS IN LIEU OF ALL OTHER EXPRESS OR IMPLIED
WARRANTIES (INCLUDING WITHOUT LIMITATION ANY WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE).
IN NO EVENT SHALL WE BE LIABLE FOR ANY SPECIAL INDIRECT OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
LOST PROFITS OR OTHER DAMAGES FROM LOSS OF PRODUCTION)
CAUSED BY DEFECTIVE MATERIAL, OR BY UNSATISFACTORY
PERFORMANCE OF THE PRODUCT, OR BY ANY OTHER BREACH OF
CONTRACT BY US.

User's Manual
MH3D
©2004 TESA Switzerland All Rights Reserved. Page 1-5
During the warranty period, as defined previously, remedial service assistance on
the machine and control will be furnished at no charge by TESA when this
equipment is in operation in Europe.
In the event that you should require information or service assistance for your
MH3D, it is recommended that you call the dealer from whom the machine was
purchased or one of the TESA regional offices. Due to the complexity of this
machine, we recommend only TESA factory authorized service centers be used.
Warranty Service

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User's Manual
MH3D
This manual should be read in its entirety by all supervisory and operating
personnel before installation, operation and maintenance. The MH3D has been
designed to minimize possible hazards to the operator and sources of damage to
the machine. While it is impossible to anticipate every situation, strict adherence
to the safety rules in this manual will reduce the possibility of injury to personnel
and damage to the machine.
Set up personnel and operators should be completely familiar with the controls,
safety devices and operation of this machine. Safe operating procedures should be
defined and applied at all times during setup, operation and maintenance.
The procedures outlined in the following pages can be used as a guide to establish
safe operating and maintenance procedures. Additional information on the safe
operation and guarding of machines is available from the United States
Department of Labor.
Every effort should be made to keep your machine safe. A daily safety inspection
should be made in addition to the normal maintenance inspection. Machine
operators should be aware of safe operating procedures and apply these proce-
dures at all times during operation. Particular emphasis should be placed on
ensuring that all guards are on the machine, in good condition and fastened
securely. Never operate the machine when its guards are removed.
Iconsindicatethefollowing:
Note
This symbol informs you of special circumstances.
The following symbols denote that extra caution should be exercised:
Caution
This symbol refers to safety information.
Caution:HighVoltage
This symbol is associated with voltages that are dangerous to
life. Use extreme caution in areas where it is posted.
General Safety

User's Manual
MH3D
©2004 TESA Switzerland All Rights Reserved. Page 1-7
TheMH3D Machine
TheMH3DCoordinate MeasuringMachinefeaturesa lightweight,tabletop,bridge
type design with a removable granite support.
This machine is designed to accommodate moderate sized work pieces with an
economicaltablemountedunit.
This series of machines incorporates the following features:
• A granite worktable that provides a stable, precision measuring surface
that is practically maintenance free.
• M10 threaded, stainless steel inserts imbedded into the granite table for
securingtheworkpiece.
• Air bearings for frictionless movement of all axes.
• A fully pneumatic, counterbalanced column, infinitely adjustable for
varying probe weights, with a built-in braking device.
• A Z-Rail Probe Holder that accommodates a wide variety of probes and
accessories.
• A machine construction that allows accurate measurement of steel
parts over a wide temperature range.
• A control interface with pushbutton access to data display and analysis.
• A bright, clear VGA monitor.
Description

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User's Manual
MH3D
Description
The MH3D System consists of the
followingmaincomponents:
1. Base
2. Granite Table
3. Y-Axis Rails
4. Bridge
5. Probe Locking Lever
6. Z-Rail
7. X-Z Carriage
8. Counterbalance Adjust Knob
9. Axis Lock Switches/Fine Adjust
Engagement
10. Probe
11. Control Box and VGA Monitor
12. Stand (optional)
13. ZMouse
14. Air Supply (rear)
15. Air Bearings (not visible)
16. Measuring System (not visible)
17. Machine Leveling Feet
18. Anti-tip Bolts
19. Granite Leveling Feet (not visible)
20. Fine Adjustment Knob
1
8
7
9
20
3
2
4 5
6-13
10
11
17 18

User's Manual
MH3D
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1. BASE - Aluminum casting of open web design with three isolation-type
leveling pads. Its construction supports the granite table and provides
rigidity and stability for accurate machine operation and measurement.
2. GRANITE TABLE - Mounted on ball and locating pin supports, the
table provides a means for locating and clamping parts to be inspected.
3. Y-AXIS RAILS - Mounted to the base, they provide the means of
guiding the bridge in an accurate and straight line along the Y axis.
4. BRIDGE - A movable structure that consists of the left and right legs
along with the X axis rail. This structure is movable on the rails for Y
axis measurements. The X axis rail forms the top portion of the unit and
provides the means for guiding the carriage in an accurate and straight
line along the X axis.
5. PROBE LOCKING LEVER - A lever that is used to clamp and release
the probe in the Z-rail probe holder.
6. Z-RAIL - An adjustable, counterbalanced rail that is movable vertically
in the carriage for making Z axis measurements. The rail houses a
pneumatic counterbalance that is infinitely adjustable for varying probe
weights. It is also provided with the means for attaching various types of
probes and accessories.
7. X-Z CARRIAGE - A structure movable on the rail for X axis measure-
ments. The carriage contains the air bearings for the X rail as well as the
air bearings for the Z rail.
8. COUNTERBALANCE ADJUST KNOB -This knob is used to adjust the
counterbalance cylinder for the varying probe weights.
9. AXIS LOCK SWITCHES - On the MH3D the switches are used to
engage or release the fine adjust mechanism.
10. PROBE - Probes are either hard or touch trigger types and are used to
takemeasurements on the piece being measured.
11. CONTROL BOX - A VGA monitor with large, easy to read
characters and a choice of languages. The display provides XYZ
readouts, software menu selections and data input capabilities.
12. STAND (OPTIONAL) - A support for the machine and air supply.
It supports the machine at the proper height for operator movements.
Description

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User's Manual
MH3D
13. Z MOUSE - Used with the control box for menu selection, measurement
point taking, scanning and for data input.
14. AIR SUPPLY - Provides and distributes air to the air bearings for
smooth, frictionless travel of the bridge, carriage and Z rail. The air
supply is also used for the adjustable Z rail counterbalance.
15. AIR BEARINGS - The air bearings provide noncontact, frictionless
movement of the bridge, carriage, and Z rail along their respective ways.
16. MEASURING SYSTEM - A highly accurate, opto-electric system, con-
sisting of a scale and an encoder head, which sends electronic signals to
the readout as it moves along the scale.
17. MACHINE LEVELING FEET - Three screws and pads used to isolate
the machine from vibrations and to level the machine.
18. ANTI-TIP BOLTS - Two bolts in the machine base that prevent the
machine from tipping if it is bumped or has an unbalanced load.
19. GRANITE LEVELING FEET - Three ball-end screws in the top of the
base that provide a three point support for the table. They are also used
to level the granite to the X and Y axes.
20. FINE ADJUSTMENT - Allows precise adjustment of all three axes by
means of knurled knobs .(Optional)
Description

User's Manual
MH3D
©2004 TESA Switzerland All Rights Reserved. Page 1-11
Dimensions
MH3D MEASUREMENTS ARE LISTED ON THE
SPECIFICATIONS SHEETS
670
415
1625
973
923
300
670

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User's Manual
MH3D
Specifications
PERFORMANCE METRIC ENGLISH
*Repeatability 0.003 mm 0.00012 in.
*VolumetricAccuracy 0.003+4.L/1000 0.0004 in.
*LinearAccuracy 0.003+3.L/1000 0.0002 in.
Resolution 0.00001 mm 0.0000025 in.
Display Range +/-9999.999 mm +/-999.99999 in.
Measuring Speed (Max.) 760mm/sec 30 in/sec
DIMENSIONS
*MeasuringRange 460 x 510 x 420 mm 18.4x20.4x16.6in.
Length 970 mm 38.8 in.
Width 930 mm 37.2 in.
Height 1620 mm 64.8 in.
Weight(Machine w/o granite) 98 kg 215 lbs
Weight(Completesystem) 190 kg 416 lbs
ShippingWeight 250 kg 549 lbs
Maximum Part Weight 227 kg 500 lbs
Part Size Capability (X,Y,Z) 600 x 750 x 430mm 24 x 30 x 17.2 in.
OPERATIONAL REQUIREMENTS
Calibration Temperature 20°C±1°C 68°F±2°F
Operating Temp. Range 13° to 35°C 55.4° to 95°F
Storage Temperature -30° to 60°C -22° to 140°F
Air Input 4.8 - 8.3 BAR 70 - 120 psi
AirConsumption 21L/min @ 4 BAR .74 CFM @ 59 psi
PowerRequirements 100 to 240 VAC 100 to 240 VAC
50/60 HZ 50/60 HZ
PowerConsumption25 VA Max. 25 VA Max.
* Machine range when using 75 mm (3.0") long probe.
Repeatability, Volumetric and Linear Accuracy is measured with a 325mm
(12.8") Ball Bar in the center of machine sytem certified.

User's Manual
MH3D
©2004 TESA Switzerland All Rights Reserved. Page 2-1
CHAPTER 2
Construction
Construction

©2004 TESA Switzerland All Rights Reserved.
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User's Manual
MH3D

User's Manual
MH3D
©2004 TESA Switzerland All Rights Reserved. Page 2-3
The MH3D is supported by a
base that is an aluminum casting of
open web design. This construction
provides a structure that is both
light and stiff.
Three isolation pads with adjustable
screws and nuts are fastened to the
bottom of the base and are used for
leveling the machine. The pads also
preventvibrations from being
transmitted to the machine and the
workpiece.
Two adjustable bolts are fastened to
the bottom of the base and are set
with1mm-1.5mm(.040"-.060")
clearance above the top of the bench. These bolts prevent the MH3D from
tipping, if it should be bumped or loaded in an unbalanced condition.
Note: These anti-tip bolts Must Not touch the bench under normal conditions.
Three ball-end screws, fastened in the top of the base, provide a three point
support for the work table. These screws are leveled at the factory and do not
normally require adjustment. These screws should only be adjusted if the work
table is not level with the X and Y axes.
The cable track is mounted to the base and houses the encoder cable and air hoses.
The Y axis cable is in a loop between the rail and the base which reduces
hysteresis.
Base
Screw
Isolation Pad
Adjusting
Nut
Locknut
Machine
Leveling Screw Anti-tip Bolt Machine
Leveling Screw

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User's Manual
MH3D
Work Table
The work table is granite with a flat lapped surface that serves as the support for
the parts to be measured. Locating pins, mounted to the bottom of the work
table, rest on ball-end screws in the top of the base. The locating pins are ori-
ented to allow the table to expand and contract with the machine.
The dark and light areas that appear in the granite are not defects but rather
natural concentrations or absences of black magnetite mineral. These color
variations do not affect the hardness, durability or accuracy of the granite
surface.
A number of stainless steel M10 threaded inserts are uniformly spaced through-
out the measuring area for clamping work pieces to the table. Note: Bolts used
for clamping the work pieces must not be overtightened, or the inserts may
pull loose from the granite. Maximum torque is 20.5 Nm.
The work table should be kept clean by wiping with alcohol, particularly when
this surface is being used as a datum.