Mitutoyo LGF-0110L-B User manual

Foreword
This instrument is a Linear Gage 0.1μm Resolution. To obtain the highest performance and the longest
service life from your Linear Gage, carefully read this manual thoroughly prior to setup and operation. After
reading this manual keep it near the Linear Gage for quick reference. The specifications of this gage and the
description in this manual are subject to change without prior notification.
Safety Precautions
To ensure operator safety, use the instrument in conformance with the directions and specifications given in
this User’s Manual.
If a contact point with a sharp tip is used, exercise sufficient care in handling during
replacement or use of it so as not to get hurt.
If a contact point is released freely after it has been pressed in, the contact point may burst
forth at a very high speed depending on the amount of spindle travel. Sufficiently exercise
care so that your fingers or hand may not be pinched.
Precautions for Use
Carefully avoid the following attempts and conditions to protect the instrument from failure and malfunction.
IMPORTANT
Do not apply sudden shocks including a drop or excessive force to the linear gage.
Do not disassemble or modify the gage.
 Do not use and store the gage at sites where it is exposed to direct sunlight or at extremely hot or cold sites.
To use the gage highly accurately, avoid sites where the temperature will change abruptly.
Absolutely do not apply an electric engraver to the gage. The high voltage may damage electronic parts.
Also, do not use the gage at sites where it is subject to large electric noises.
Do not exert load on the spindle in the perpendicular direction and do not twist the spindle.
Do not clamp the stem too tightly, since the spindle will not move smoothly.
Do not apply excessive tension to the cable or do not bend it forcibly.
To perform stable measurement, allow at least 10 minutes after turning on the power.
Do not set up the origin point at either end of the stroke.
If the gage is used in combination with other instruments, the maximum performance could not be obtained
depending on environmental and operating conditions. Take those conditions into consideration prior to use.
 The functions and performance will not be guaranteed, if the gage is used in other conditions than those specified.
Tale sufficient damage-preventive processing (safety measures), should this gage have been at fault.
A contact point could hurt a workpiece depending on the workpiece material, measuring force, impact
when the contact point comes in contact with the workpiece, etc. Check that there is no problem of hurts
on a workpiece during measurement or accuracy variation depending on the measuring force, etc., in
advance of use.
Electromagnetic Compatibility (EMC)
This product complies with the EMC Directive. Note that in environments where electromagnetic interference
exceeds EMC requirements defined in this directive, appropriate countermeasures are required to assure
the product performance.
Disposal of Old Electrical & Electronic Equipment (Applicable in the European
Union and other European countries with separate collection systems)
This symbol on the product or on its packaging indicates that this product shall not be treated
as household waste. To reduce the environmental impact of WEEE (Waste Electrical and
Electronic Equipment) and minimize the volume of WEEE entering landfills, please reuse
and recycle.
For further information, please contact your local dealer or distributors.
Export Control Compliance
The goods, technologies or software described herein may be subject to National or International, or
Japanese Export Controls. To export directly or indirectly such matter without due approval from the
appropriate authorities may therefore be a breach of export control regulations and the law.
1. Name and Dimension of Each Part
(1)Stem
(2)Rubber boot
(3)Spindle
(4)Contact point
(5)Output cable
(6)Output connector
2. Mounting the Gage
To mount the gage on another instrument or a fixture, clamp the Φ8 stem or Φ15 stem.
It is recommended to use a slotted holder or a split bushing for the mount structure.
IMPORTANT
Absolutely avoid pressing the stem directly with set screws.
(The built-in bearing may be damaged.)
Notice that excessively tightening the stem can cause trouble in the spindle operation.
Never fix a linear gage at other than the stem.
Mount the gages so that the spindle is directed perpendicular to
the measured surface. If the gage is mounted at an angle to the measured surface,
an error may be generated in measurement results.
Exercise care so as not to exert a force on the gage through the cable.
3. Precautions in Protecting the Gage from Dust and Water
IMPORTANT
The output connector plug and preamplifier (counter side) is not protective structured. Install the gage at a
place where it is not splashed directly with water or oil.
If an extension cable is used, completely cover the preamplifier and connector area with a seal so as not to
be exposed to environments.
If the cable covering is broken, liquid will penetrate into the gage inside due to capillary phenomenon. This
will cause damage to the gage. Immediately repair the cable.
Be greatly careful not to damage the rubber boot due to chips, etc. If the rubber boot is damaged,
dust-proof function will be deteriorated. Immediately replace or repair the rubber boot.
The materials including rubber which are used for the rubber boot and other sealing parts are not universal
against diversified coolants and chemicals. If those parts deteriorate unusually, consult the nearest
Mitutoyo Service Center.
If linear gages are used in adverse environments where they are subject to frequent splashes of water and
oil, it is recommended to take preventive measures such as replacing them before being damaged.
Each part of the gage is sealed up, and therefore must not be disassembled. If any part is disassembled,
the rated performance will not be obtained. Do not absolutely disassemble the gage.
4. Connecting the Gage to a Counter
Connect the output connector of the gage to the input connector on a linear gage counter. For detailed
information, refer to the user’s manual of the linear gage counter.
IMPORTANT
If the gage cable is close to the power line for other instruments, the gage may malfunction. Connect the
gage cable as apart from the power line as possible.
If the gage is connected with other counter than Mitutoyo made, allow at least 0.2 second after the gage is
turned on, then reset the counter.
5. Gage Output Signals
1) Output connector: RM12BPE-6PH (Hirose)
2) Pin assignment
Pin No.
Signal name
Pin No.
Signal name
Pin No.
Signal name
1
+5V *3
3
ΦB
5
GND
2
ΦA
4
ΦA
6
ΦB
*3: Power supply to the gage head
Power voltage; 5V (4.8N to 5.2V),
Ripple voltage: 200mVp-p or less
Current consumption: 120mAmax.
3) Input/output signal level
ΦA, ΦA, ΦB, ΦB, ΦZ (TTL line driver AM26LS31 or equivalent)
4) Output signal chart
This series of gages are provided with the following three patterns for their output signals. Therefore,
always design the reception circuitry so that it includes an error detecting process making use of these
patterns:
(A) Real-time pulse output (Phase-A wave advances when the spindle is retracted.)
(1) Output condition: Spindle moving speed ≤Gage response speed *4
(2) Minimum edge-to-edge interval of output pulses: Tr = 0.2 μs
(3) Output delay time *5: Max. 2.5 μs
Linear Gage LGF-0110L-B / 0125L-B
LGF-0125L-B
ΦA
ΦB
Tr (minimum) = 0.2μs ⇒0.1 μm (resolution)
*1: For 10mm Stroke type
*2: For 25/50mm Stroke type
Cross section
Split bushing
Cross section
*2
*1
(90°with respect to tap)
+0.020
+0.005
Unit:mm
・Example2
・Example1
1
*2
15
7.5
6
16
15
7.5
M4x0.7thru
4.5 drill, 7.5 countersink, 4.4deep
20
15
7.5
M4x0.7thru
10
15
6
Φ8
Φ15
*2
*1
Φ10
Φ17
(1)
(1)
Notch position
(2)
(2)
15
１
Φ15
Φ8
*1
*2
Φ17
Φ10
*1
+0.024
+0.006
+0.020
+0.005
+0.024
+0.006
0
-0.015
0
-0.018
+0.020 +0.005
+0.024 +0.006
NOTE
2
3
4
6
5
1
(Hirose)
(Thread height)
Cable length = 2m
(Thrust stem mounting screw)
10.6 or more
(stroke)
(Thread height)
(Hirose)
Cable length = 2m
Thrust stem
mounting screw
26 or more
(stroke)
θ
Error = L0 - L1
LGF-0110L-B
No. 99MBC104B1
Series No. 542

(B) Error output
The pulse generation circuit may sometimes overstep its response limit, if the output wave is subject to
extreme disturbance due to vibration or impact in the gage unit, or if the spindle moves faster beyond
the output limit. However, at this time, as the linear gage will automatically switch its output signal form
to error pulses and also synchronize Phase A and Phase B of the 2-phase square wave signals, the
user can make use of this facility for error detection.
(1) Output condition: The gage will be identified as error under the following conditions and
produce its output in one of the above described special patterns.
●Gage response speed *4 < Spindle moving speed
●At a disturbance such as noise interference, vibration, etc.
(2) Minimum edge-to-edge interval of output pulses: Te = 0.2 μs
*4: Gage respond speed: Refer to the section of specifications of the Users Manual.
*5: Output delay time: Time until the counting pulse catches up the spindle position
IMPORTANT
Since any output during error can not be used as the attribute data, it is necessary to detect the error
condition at the reception circuitry side.
It is recommended to design user circuitry based on an IC chip that is capable of counting at 5 Mcps
(equivalent to a square wave of 1.25 MHz) or greater.
5) Input connector and recommended input circuit connector: RM12BRD-6S (HIROSE ELECTRIC)
6) Cable extendible length: The cable can be extended up to 20m using the extension cable (optional).
6. Maintenance
1) Replacing the contact point
Fit the supplied key spanner in the keyway of the spindle, then detach or
attach the contact point by pinching it with a wrench, etc.
IMPORTANT
If torque is applied to the sensor inside through the spindle,
damage or malfunction in the sensor may result. Be sure to
fix the spindle using the key spanner.
2) Replacing the rubber boot
Preventive replacement before being damaged is recommendable.
(The rubber boot is available as an optional accessory.)
(1) Remove the old rubber boot, then eliminate the dust and dirt in the grooves (part A) of the stem and
spindle.
(2) Insert a rubber boot between the stem and contact point, directing the greater inside diameter end to the
stem.
(3) Apply a small amount of silicone adhesive to the grooves (part A), and seal both ends of the rubber boot.
IMPORTANT
If the adhesive is applied to the spindle, the spindle will not slide properly. Great care must be exercised.
7. Specifications
Order NO.
542-181
542-182
Model No.
LGF - 0110L - B
LGF –0125L - B
Measuring range
10mm
25mm
Resolution
0.1μm
Accuracy (at 20℃)
(0.8 + L/50) μmL = Measured length in mm
Quantizing error
±1 count
Meas.
force
Contact point downwards
1.2 N or less
4.6 N or less
Contact point horizontal
1.1 N or less
4.3 N or less
Contact point upwards
1.0 N or less
4.0 N or less
Positional sensor
Photoelectric transmission linear encoder
Response speed
400mm/s *6
Output method
90°phase differential square wave (compatible with RS-422A)
Output signal pitch
0.4μm
Minimum edge interval
200ns
Contact point
Φ3 carbide ball(Thread: M2.5x0.45)
Stem diameter
Φ8
Φ15
Bearing type
Stroke ball bearing
Protection level
IP66
Output cable length
2m (directly wired from the gage)
Operating temperature(humidity)
0 to 40 ℃(20 to 80%RH, with no condensation)
Storage temperature(humidity)
-10 to 60 ℃(20 to 80%RH, with no condensation)
Accessory
No. 538610 Key spanner for contact point replacement (10mm type)
No. 210187 Key spanner for contact point replacement (25/50mm type)
CE marking
EMC Directive: EN61326-1
Immunity test requirements: Clause 6.2 Table2
Emission limit: Class B
*6: An over speed error may occur depending on the spindle retraction amount, if the contact point is
released freely after it is retracted.
8. Optional Accessories
●Extension cable(5m) : No. 902434
●Extension cable(10m) : No. 902433
●Extension cable(20m) : No. 902432
●Rubber boot (for 10mm type) : No. 238772
●Rubber boot (for 25mm type) : No. 962504
If the thrust stem and tightening nut are used, the gage mount fixture needs only Φ9.5 or Φ18 hole to be
drilled, and also the gage can be mounted firmly and easily. (see below.)
●Thrust stem (for 10mm type) :No. 02ADB681
●Tightening nut (for 10mm type) :No. 02ADB682
●Dedicated spanner (for 10mm type) : No. 02ADB683
●Thrust stem (for 25/50mm type) :No. 02ADN371
●Tightening nut (for 25/50mm type) :No. 02ADB692
●Dedicated spanner (for 25/50mm type) :No. 02ADB693
＝Example of use＝
IMPORTANT
Before mounting the trust stem, be sure to secure the stem using the dedicated spanner (No.02ADB683/
No.02ADB693). Excessive force applied between the gage body and stem may cause damage to the
gage.
M9 x 0.5/M14 x 0.5 screw are sued only for mounting the trust stem. Do not use them for other purposes.
LGF-0110L-B
LGF-0125L-B
Thrust stem set (for 25/50mm type)
No.02ADN370
Fixture width L: within 6 to 10.5mm
Fixture width L: within 10 to 13mm
LGF-0125L-B
LGF-0110L-B
ΦA
ΦB
Te (minimum) = 0.2 μs
Thrust stem set (for 10mm type)
No.02ADB680
ΦA, ΦB
ΦA, ΦB
Recommended input circuit
LGF output circuit
26LS32 or equivalent
33pF
51Ω
GND
GND
+5V
+5V
Key Way
Key spanner
(for replacing contact points)
(
Ａ
)
(
Ａ
)
Stem
Spindle
Key Way
Rubber boot
Contact point
(
Ａ
)
(
Ａ
)
Stem
Spindle
Key Way
Rubber boot
Contact point
(Optional accessories)
Thrust stem
(Optional accessories)
(Optional accessories)
Dedicated spanner
Mounting nut
Thrust stem / Mounting nut
Dimension between
hexagonal opposing sides
Thrust stem
(Optional accessories)
(Optional accessories)
(Optional accessories)
Dedicated spanner
Mounting nut
Thrust stem / Mounting nut
Dimension between
hexagonal opposing sides
Mitutoyo Corporation
20-1, Sakado 1-Chome, Takatsu-ku,
Kawasaki-shi, Kanagawa 213-8533, Japan