Mitutoyo LGB2 User manual

LINEAR GAGES
SLIM HEAD LGB2
User´s Manual
- Instructions for use -
Read this User's Manual thoroughly before operating the instrument.
After reading, retain it close at hand for future reference.
No.: 4771
④
September 2019
LINEAR GAGES
SLIM HEAD LGB2
User´s Manual
- Instructions for use -
Read this User's Manual thoroughly before operating the instrument.
After reading, retain it close at hand for future reference.
No.: 4771
④
September 2019

No.: 4771
④

PRECAUTIONS
In order to obtain the best possible performance and longest service life from your Linear Gage, please read this
manual thoroughly prior to use. Be sure to observe the following precautions:
•Do not apply excessive force or bump when setting up and operating the Linear Gage.
•The Linear Gage has been accurately adjusted at the factory. Never attempt to disassemble it.
•To ensure measuring accuracy, do not use the Linear Gage in an environment where it may be subjected to
sudden temperature changes.
•When using the Linear Gage in conjunction with other instruments or equipment, an appropriate environment
and operating conditions should be ensured for adequate performance.
•Use the Linear Gage as specified below, otherwise the rated function and performance may not be obtained.
•Have preventative safety measures in place to avoid damage should the Linear Gage malfunction.
NOTICE
All information about our products, in particular the illustrations, drawings, dimensional and performance data as
well as other technical data contained in this publication are approximate average values. The design, technical
data, dimensions and weight are subject to change without notice. Our stated standards, similar technical regu-
lations as well as technical data, descriptions and illustrations of the products correspond to the date of printing.
In addition, our General Terms and Conditions shall apply as amended from time to time. Only the offers made
by us are authoritative.
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Table of Contents
PRECAUTIONS........................................................................................................... i
1 PART NAMES AND DIMENSIONS........................................................................... 1
2 INSTALLING THE LINEAR GAGE............................................................................2
2.1 CONNECTING THE AIR HOSE (FOR 542-223, 542-230).............................. 2
3 CONNECTING THE COUNTER................................................................................ 4
4 OUTPUT SIGNAL SPECIFICATIONS....................................................................... 5
4.1 All models other than 542-421.........................................................................5
4.2 542-421.............................................................................................................7
5 REPLACING THE CONTACT POINT....................................................................... 8
6 REPLACING THE RUBBER BOOT.......................................................................... 9
7 PROTECTION AGAINST DUST AND WATER.......................................................10
8 SPECIFICATIONS.................................................................................................... 11
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1 PART NAMES AND DIMENSIONS
1PART NAMES AND DIMENSIONS
①
Contact point
②
Rubber boot
③
Stem
④
Body
⑤
Connecting cable
⑥
Air cylinder
⑦
Air nozzle
⑧
Knurled thimble
⑨
Fixing nut
⑩
Displacement
A Preamplifier box
B Output connector
(HIROSE RM12BPE-6PH)
C Output connector (D-sub)
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2 INSTALLING THE LINEAR GAGE
2INSTALLING THE LINEAR GAGE
Insert the stem into the hole of the gage mount or stand and clamp it with the screw.
See the Linear Gage mount examples given below.
CAUTION
•Do not clamp the Linear Gage using excessive force. This may cause the spindle to stick.
•Do not mount the Linear Gage by clamping with a screw on the stem.
•Do not mount the Linear Gage at any portion other than the stem.
•Mount the Linear Gage perpendicular to the surface to be measured. Otherwise, a measurement error will
be produced as shown below.
Error = I0 - I1
•Ensure that the gage body is not subjected to a force via the pull of the cable.
2.1 CONNECTING THE AIR HOSE (FOR 542-223, 542-230)
Connect the air hose as specified below:
•Air pressure: 0.3-0.4MPa (3-4kgf/cm2)
•Lubrication oil: Class 1 turbine oil (ISO VG32)
①
A
②
Air cylinder
③
Valve
④
Lubricator
⑤
Regulator
⑥
Air filter
⑦
Air regulator set
CAUTION
•Never hold the air cylinder when installing the gage. This may damage portion A. Be sure that portion A
is not subjected to excessive force when connecting the air hose.
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2 INSTALLING THE LINEAR GAGE
NOTICE
The following optional brackets are available to mount the Linear Gage. lf brackets require machining, it is rec-
ommended to set dimension B (See the figures below) to 11.5mm. This Linear Gage has very wide applica-
tions. Use of optional brackets is usually more cost-and time-efficient than fabricating custom designed brack-
ets. Thus, optional brackets have been designed to mount the Linear Gage on varied machines using varied
methods. The brackets are fabricated from cast iron (nickel-plated).
Order No. 303568
Model B-1
AØ9.5 G 16
B 11.5 H 12
C 20 I 1.75
D 30 J 40
E 35 K Ø4.5
F 7
Order No. 303570
Model B-3
AØ9.5 E 40
B 11.5 F 20
C 60 G Ø4.5
D 5.5
Order No. 303572
Model B-5
AØ9.5 F 18
B 11.5 G 15
C 20 H 20
D 30 I Ø4.5
E 35
Order No. 303574
Model B-7
AØ9.5 G 10
B 11.5 H 20
CØ15 I 15
D 20 J 35
E 40 K Ø4.5
F 8.5 L 1.25
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3 CONNECTING THE COUNTER
3CONNECTING THE COUNTER
Couple the connector of the Linear Gage with the INPUT connector on the Linear Gage Counter. (Refer to the op-
eration manual that came with the Linear Gage Counter for further details.)
CAUTION
To avoid malfunction due to electrical interference, do not place the cable of the Linear Gage near the power
cord for other equipment.
NOTICE
The output of the Linear Gage Counter can be used to transfer measurement data from the Linear Gage to a
Mitutoyo Digimatic miniprocessor (data processing unit) for statistical calculations.
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4 OUTPUT SIGNAL SPECIFICATIONS
4OUTPUT SIGNAL
SPECIFICATIONS
4.1 All models other than 542-421
1Output connector: RM12BPE-6PH (Manufacturer: Hirose)
2Connector pin assignment
Pin No. Signal name
*Power supply to the Linear Gage(100mA) The ripple of the
power source should be less than 200mV(p-p).
3Output signal level: +5V (4.8V to 5.3V, 80mA): φA, φA, φB, φB, TTL output (equivalent to line driver SN75158)
4Timing chart
(for LGB2-0105L: 0,1µm)
5Receiving connector and receiver Connector (RM12BRD-6S, Hirose) Receiver (Equivalent to differential input
line receiver SN75182)
6Maximum cable length 20m (using an optional extension cable)
7Basic circuitry for processing received signals. The following diagrams show the basic circuitry for processing
the signals from the Linear Gage, and the waveforms of the output signals.
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4 OUTPUT SIGNAL SPECIFICATIONS
These values determine the
falling/rising pulse width.
Up pulse
Down pulse
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4 OUTPUT SIGNAL SPECIFICATIONS
4.2 542-421
Output signal
phase difference
Output connector
•Receiving connector : DS-15S-N (JAE)
•Frame ground : Connect to casting of output
connector
Pin No. Signal name Pin No. Signal name
1 0V 7 VDC
2 0V 8 -
3 +5V±5% 70mA 9 Alarm
4 +5V±5% 70mA 10 - 14 -
5 Phase A 15 Do not connect
6 Phase B
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5 REPLACING THE CONTACT POINT
5REPLACING THE CONTACT
POINT
Hold the spindle at the notched portion using the supplied key spanner wrench. Put felt or a soft cloth on the con-
tact point to protect it before removing with a pair of pliers. Then attach a new contact point.
CAUTION
•When replacing the contact point, firmly hold the spindle with the key spanner wrench. If torque is applied to
the spindle, the internal mechanism of the Linear Gage may be damaged.
•Please be careful enough when handling the knife edge or blade type contact point, since there is a possibil-
ity of injury at exchange and use.
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6 REPLACING THE RUBBER BOOT
6REPLACING THE RUBBER BOOT
1Remove the old rubber boot. Wipe off dust and oil from the grooves (A) with a cloth dampened with thinner.
①
Stem
②
Spindle
③
Rubber boot
④
Grooves (A)
⑤
Spanner notch
⑥
Contact point
2Push a new rubber boot over the spindle. The end with the larger diameter should be on the stem side.
3Apply a small amount of silicone-type adhesive over the grooves (A). Do not allow any of the adhesive to con-
taminate the spindle; this may cause the spindle to stick.
4Use a pair of tweezers to fit one end of the boot into the groove on the stem.
5Stretch the boot with your fingers and fit the other end of the boot in the groove on the spindle.
6Use a clean cloth to wipe off the excess adhesive.
7
NOTICE
The durability of the rubber boot varies depending on environmental conditions. If the rubber boot deterio-
rates too quickly, contact the nearest Mitutoyo sales office.
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7 PROTECTION AGAINST DUST AND WATER
7PROTECTION AGAINST DUST
AND WATER
The dust and water resistance of the Linear Gage conforms to IP-54 (DIN40 050-1/IEC529 Specifications).
CAUTION
•The preamplifier and counter are not resistant to water. Do not use them in a place where they may be sub-
jected to water or oil.
•If an extension cable is used, completely coat the connections on the cable and preamplifier with a sealant.
•If the insulating cover of the connecting cable is damaged, liquid may enter the Linear Gage, causing a mal-
function. Have the damaged cable repaired immediately.
•Cutting chips may damage the rubber boot, reducing its resistance to dust and water. Replace the damaged
rubber boot with a new one or have it repaired immediately.
•Some types of chemicals or coolants may corrode the rubber boot and rubber seals. If rubber parts deterio-
rate too quickly, contact the nearest Mitutoyo sales office.
•The Linear Gage is sealed and cannot be disassembled. Never attempt to disassemble it. Otherwise, seals
may be damaged, deteriorating the performance of the Linear Gage.
10 No.: 4771
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8 SPECIFICATIONS
8SPECIFICATIONS
Code No 542-262 542-244 542-246
Model LGB2-110 LGB2-105L LGB2-0105L
Measuring range 10mm 5mm
Resolution 1μm 0.1μm
Measuring accuracy
(at 20°C)
2μm 0.8μm
Quantizing error ±1count
Measuring force
Upward spin-
dle Position
≤0.7N ≤0.55N
Horizontal spin-
dle Position
≤0.75N ≤0.6N
Downward spin-
dle position
≤0.8N ≤0.65N
Output signal Differential square wave signals , 90°phase differ-
ence, 4µm pitch(0.4µm*) (conforms to RS-422A)
Mass 150g 145g
Operating tempera-
ture
0°C - 40°C 10°C - 30°C
Code No 542-262H 542-270 542-264 542-421
Model LGB2-110H LGB2-110AR LGB2-110-1 LGB2-0110S
Measuring range 10mm
Resolution 1μm
Measuring accuracy
(at 20°C)
1μm 2μm
Quantizing error ±1count
Measuring force
Upward spin-
dle Position
≤0.7N ≤0.5N ≤0.7N
Horizontal spin-
dle Position
≤0.75N ≤0.55N ≤0.75N
Downward spin-
dle position
≤0.8N ≤0.6N ≤0.8N
Output signal Differential square wave signals , 90°phase differ-
ence, 4µm pitch(0.4µm*) (conforms to RS-422A)
Sin Wave signals,
90° phase differ-
ence, 20µm pitch
Mass 150g 165g 150g 160g
Operating tempera-
ture
0°C - 40°C
*For the LGB2-0105L
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8 SPECIFICATIONS
General information
Protection class IP-54
Contact point Carbide ball (M2.5x0.5)
Stem diameter Ø9.5mm
Storage temperature -10°C - 60°C
Relative humidity 20% to 80%RH (no condensation)
standard accessories
Key wrench (2 Types)
optional accessories
Nr. 238 772 Rubber boot for 542-262, 542-262H, 542-270, 542-264, 542-421
Nr. 238 773 Rubber boot for 542-244, 542-246
Nr. 902 434 Extension cable (5 m)
Nr. 902 433 Extension cable (10 m)
Nr. 902 432 Extension cable (20 m)
Interchangeable contact point:
Contact points for Mitutoyo dial indicators can be used.
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