ATO WTA Series User manual

Application & Installation
Guide
For Linear Scale
VER: 1.00

Application & Installation Guide for Linear Scale (VER1.0 )
1
Content
（Please carefully read the preface before operating ）
1. Principle and application......................................................... 4
2. Instrument Consistency........................................................... 5
3. Specification............................................................................ 5
3.1. Device Model....................................................................5
3.2.Table of Specification........................................................ 6
3.3. Output Signal....................................................................7
3.4 Structure & Installation Figure........................................ 10
4. Installation............................................................................. 12
4.1 Notice for Installation...................................................... 12
4.2 Standard of Installation....................................................16

Application & Installation Guide for Linear Scale (VER1.0 )
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Preface the operation and maintenance
of linear scale
Requirements of the Working Conditions
1. Do not use the device in an atmosphere charged with
inflammable gases. Do not use it in the condition with
metal powder, oil, water or dust.
2. Do not disclose it in the bitter sunshine or high
temperature. the ambient working temperature should
range from 0℃~~40℃.
3. Be far away from the strong acid and alkali as well as the
chemicals.
4. Keep the signal cable of the linear scale far from the
power cords as possible.
5. Take the way of installation into consideration when
using the device in the situations of high voltage, strong
current or magnetic field. do well in isolating the
haphazard signals and avoid the disturbance of such.
Rational possesses the authority of explaining the instruction.
Rational won’t specially inform the user of the instruction.
Please contact the dealer if you have any trouble.

Application & Installation Guide for Linear Scale (VER1.0 )
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Other Requirements
I. Offer a proper match between the installation interface and
the electric signal interface when designing and applying the
device.
II. Do not lay heavy blocks on the signal cable. Please bundleand
fix the excessive signal cable if it is overlong and do en -sure
the workers and the equipment a favorable working path.
III. Make sure that the plugs of the signal cable are well and stabl
-y plugged onto the corresponding interface.
IV. Design the application of the linear scale according to its effe
-ctive travel range, and avoid the occurrence of surpassing the
effective range and the damage of the device.
V. Do not let dust pile up on the linear scale and the read-head or
the track of the moveable body of the linear scale.
VI. Be sure to turn off the power before unplugging the connecter
of the signal cable.
Daily Maintenance
I. Check the device after uncovering the package. Please imm
-ediately contact the dealer as soon as possible if the compone
-nts are not complete or the malfunction needs settling. Do
not disassemble or modify it at your wishes.
II. Do not clean the dust on or around the read-head and the
moveable body with forced strength or air, for it may result in
the dust dropping in the interior of the moveable body.

Application & Installation Guide for Linear Scale (VER1.0 )
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I. Warranty
In normal cases, the linear scale is guaranteed one year’s repair
since it was sold.
1. Principle and application
This linear scale is a kind of transmission amplitude grating, and the princ
-iple is, when the opposite travel main grating and the subordinate grating
occurs, the Moire grid/line is generated. This change will be transferred into
electric signal through the precise photo-electric exchanger, and then the digi
-tal signal at the relative travel is output after it is processed by the signal
processing circuit.
This product can be grated with Digital Readout and form a grating measu
-ring system and perform precise and accurate travel measurement. In additi
-ional, it can be applied in the trades of processing and measuring:
Equipment for processing: Lathe, Miller, Grinder and Electric dis-
charge machine.
Instrument for measuring: Profile projector, Video measuring instrument,
Tool maker microscope and so on.

Application & Installation Guide for Linear Scale (VER1.0 )
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2. Instrument Consistency
1. Linear scale 1pcs
2. Application & installation 1pcs
3. Certificate 1pcs
4. Packing list 1pcs
5. Accessory pack 1pcs
3. Specification
3.1. Device Model

Application & Installation Guide for Linear Scale (VER1.0 )
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3.2.Table of Specification
Item
WTA（thin scale）
WTB(thick
scale)
Resolution（µm）
1μ, 5μ
Effective movement L (mm)
50~1000
50~3000
Maximum
Movement（mm）
50≦L≦900
L+30
L≧950
L+50
Distance between
holes (mm)
50≦L≦900
L+132
L+136
L≧950
L+152
L+156
Length of the scale
(mm)
50≦L≦900
L+149
L+154
L≧950
L+169
L+174
Length of the signal cable (M)
3.5;(L≦150,300≦L≦950)
3.5;(L≦950)
5;(L=200,250,1000)
5;(1000≦L≦1900)
10;(2000≦L≦3000)
Thickness（mm）
21
29
Maximum velocity (M/min)
60
60
Working voltage (volt)
5±0.25
Work waste
MAX. 5V, 40mA
Reserving temperature(℃)
0~50
Working temperature(℃)
0~40

Application & Installation Guide for Linear Scale (VER1.0 )
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3.3. Output Signal
3.3.1 Two modes for outputting signal: TTL and
RS422(differential type) signal, and the oscillogram is as
follows:
3.3.2 Referent Interface Circuit Diagram
3.3.2.1 The output signal interface circuit diagram is as follows:
A /B /R I O u tp u t s ig n a l
A /B /R I O u tp u t s ig n a l
2 6 L S 3 1
+
-

Application & Installation Guide for Linear Scale (VER1.0 )
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3.3.2.2 Propositional pairing interface circuit diagram
3.3.3 Pin Position
-
7 4 H C T1 4
+
TTL Interface
R1 = 68 C 1= 1 000 P F
R2 = 10 0 C 2= 100 P F
R3 = 10 K
A/B/R I
R1
C1 C 2
R2
R3
SCAL E COU NTE R
-
+
SCALE
+
R2
R3
R1
-
Vcc
RS422 Interface
R1=120
R2=R3=5K
A/B/RI
A/B/RI
10
10
26LS31
ANTENNA
COUNTER
26LS32

Application & Installation Guide for Linear Scale (VER1.0 )
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Note: The 9PD-TTLis a standard socket and the others are optional.
1
4
5
2
3
PIN C olor of signal line
+5V
B
RI
A
0V
Yellow
Orange
Brown
Black
SIGNAL
Red
Attribute Current
Input
Input
Output
Output
Output
35mA
35mA
4mA
4mA
4mA
Attribute
0V
SIGNAL
NC
PIN
A
3
4
5+5V
B
1
2
C olor of signal line
Black
Brown
Yellow
Orange
Red
Output
Output
Input
Input
4mA
4mA
Current
35mA
35mA
Attribute
Attribute
0V
SIGNAL
+5V
B
4
5RI
PIN
1
3
2
A
Yellow
Orange
Brown
Black
C olor of signal line
Red
+5V
SIGNAL
0V
PIN
A
3
4
5
RI
B
1
2
C olor of signal line
Black
Brown
Yellow
Orange
Red
4mA
Output 4mA
Input
Input
Output
Output
35mA
35mA
4mA
Current
Output
Output
Output
Input
Input
4mA
4mA
4mA
Current
35mA
35mA
Weaving net
FG
9
Attribute
FG
0V
RI
5
9
3
4
2
A
B
Weaving net
Orange
Yellow
Brown
Black
SIGNAL
+5V
PIN
1
C olor of signal line
Red 35mA
Output
Output
Output
Input
4mA
4mA
4mA
35mA
Input
Current
FG
RI
64mA
Output
7Weaving net
6FG Weaving net
4mA
Orange/White
RI
6
74mA
BYellow/White Output
8ABrown/White Output 4mA
FG
9Weaving net
-TTL socket(standard)
2) 15PD-TTL socket(opt)
3) 7-wire TTL socket(opt)
4) 6-wire TTL socket(opt)
-RS422 socket (option)

Application & Installation Guide for Linear Scale (VER1.0 )
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3.4 Structure & Installation Figure
3.4.1 Installation Figure
Instruction figure of WTB Series linear scale. Take the
effecttive range L≦900mmfor an example﹕
2-M 5-6H
(66.8)
21
60
15
610
60 ± 0.1
2-M 4-6H H ight 8
90
A
A向
28
6
15
10
27.3 23.5
6
10
44.5
29
10
23.5
6
1.3
15
11
WTB series Effective movement <= 900mm
Length of the scale = L + 154
Distance between holes of the main scale = L + 136
Effective movement = L
Max movement = L + 30
Relative dimensions of WTB series linear scale
L
Max Range
Dist between Holes
Length of Scale
Other Dimensions
L≦900
L+30
L+136
L+154
Refer to the figure
above
L＞900
L+50
L+156
L+174

Application & Installation Guide for Linear Scale (VER1.0 )
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Installation figure of WTA series linear scale. Take the
effective range≦900mm for an example﹕
8
5
10.25
58
10.25 2-M 4-6H H eight 7
60∮0.1
20.5
1.3
61.5
21
11 39.2
11
21
5
8
20
25.5
8
5
20
2-M 5-6H
90
60
Length of scale = L + 149
D istance betw een holes of the m ain scale = L + 132
M ax m ovem ent = L + 30
A向
A
W TA series effective m ovem ent < 900 m m
Effective m ovem ent = L
Relative dimensions of WTA series linear scale
L
Max range
Distance between holes
Length of Scale
Other Dimensions
L≦900
L+30
L+132
L+149
Refer to the figure
above
L＞900
L+50
L+152
L+169

Application & Installation Guide for Linear Scale (VER1.0 )
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3.4.2 Part Drawing
Read head Signal cable
Left head
Body
Right head
4. Installation
4.1 Notice for Installation
1. The effective movement of the linear scale should be larger than the
maximum travel of the worktable. If it is not long enough, change a long
-er one or install fixing blocks on the worktable. Not less than 10mm
space should be spared between the end of the Read Head and the body
of the scale.(Figure 4.1)
Figure 4.1

Application & Installation Guide for Linear Scale (VER1.0 )
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2. As to the installation surface of the linear scale, if it is not mechanical
work surface, you should place a cushion on the back of the scale or
self-made installation cushion. Only in this case can ensure the stability
and reliability of the linear scale and installation surface.
3. When you calibrate the parallelity of the body of the linear scale with
level meter or other similar devices, the angle of the measuring head
must be confined within ±30°(based on the measuring head of the level
meter being parallel with the level meter itself). As for the angle, the
smaller, the better. If you use the decimal meter(Figure4.5, 4.6, 4.8, 4.9),
you must make the bar of the measuring head perpendicular with the
surface to be measured, only in this case can ensure the actual measur
-ing precision.
4. Please closely consider the following factors when selecting the position
where the linear scale to be installed:
Select mechanical work surface as the installation surface.
The groove of the linear scale must avoid the direct shock of met
-al powder, oil, water and dust (Figure4.2).
The length of the L-board, in the possible conditions, the shorter
the better, and the bearing pressure of the installation surface of
the L-board must be taken into close consideration, as well as the
L-board Seri -al Read Head and the interface of the moving
worktable.

Application & Installation Guide for Linear Scale (VER1.0 )
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Incorrect installation
F i g u r e 4 . 2
C o rrect in stallation
5. More than 0.5mm space must
be spared between the
dust-proof cover and the body
of the scale. Allow no contact
between them when moving
the scale.
6. The screw thread of the
installation hole must have a,
at least, 6-threading die
screwing depth. The part
which bears more pressure,
such as the fixing board for
supporting the DRO, must
have a, at least, 8-threading
die screwing depth. WTA series linear scale is tightened with M4 screw,
and WTB with M5. After drilling holes on the installation surface, you
have to smooth the granulated surface and clean the paint and the stains
(Figure4.4).
Figure 4.3
Figure 4.4

Application & Installation Guide for Linear Scale (VER1.0 )
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7. You must consider all the relevant moving distance before fixing the sig
-nal cable. The fixing position should be placed in the middle of the trac
-k as possible as you can. And then well bundle the surplus cable.
8. Make sure that the ground wire is grounded, and measure from the cover
of the Read Head to the ground terminal of the signal processing device
with a volt-ohm meter (the ground connector of the DRO). confirm the
resistance is not more than 0.3Ω(Resistance≦0.3Ω).
9. Based on the center of the linear scale, you must take the point of symm
-etry of the two sides as the criteria point when adjusting the height and
level of the linear scale. As to any linear scale, whenever you perform th
-e horizontal adjustment or vertical adjustment, for the body of the linear
scale itself, the range of the adjustment can’t individually exceed 20mm
from the end of the meter to the body of the scale (Figure4.5). As for the
Read Head, perform the adjustment within the two square standard sides
(Figure 4.6)
Figure 4.6
F i g u r e 4 . 5

Application & Installation Guide for Linear Scale (VER1.0 )
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10．The crooked radius of the signal cable should be more than
60mm.
4.2 Standard of Installation
1. The standard of installing the referent surface (Figure 4.8 a,b,c
3 ways of installation)
The installation surface of the body is parallel with
that of the Read Head. The parallelity is less than 0.1
mm.
The installation surface of the body is perpendicular
with that of the Read Head. The perpendicularity is
less than 0.1mm.
R>60
Figure 4.7

Application & Installation Guide for Linear Scale (VER1.0 )
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Figure 5.1
2. Standard of the Body (Figure4.9, 4.10)
The parallelity of the height referring to the track of the
worktable is less than 0.1mm, and the maximum can’t surpass
0.15mm. Based on the point of symmetry, the smaller, the bett
-er. When the effective movement of the body is greater than
950mm, its linearity should be less than 0.1mm.
Figure 5.2（L < 950） Figure 5.3 ( L>950 )

Application & Installation Guide for Linear Scale (VER1.0 )
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3. Standard of Read-Head:
The interval between the read-head and
the body of the scale should range from
0.8mm to 1.6mm. Use a cushion to
adjust the interval when installing the
read-head after it is well installed, draw
out the cushion (Figure 4.11).
Theαside of the read-head and theβ
side of the body disturb horizontally.
The value△:WTB:0.5 0.15mm
WTA: 0.25 0.15mm
The parallelity of the read-head referring
to the worktable is less than 0.10mm,
and the maximum parallelity can’t
exceed 0.15mm (Figure 4.6).
4 Notice:
In the figures, R indicates the crooked radius; F: the track of
the worktable; L: the effective movement of the linear scale;
K: the installation dimensions.
圖 5.4