16 E6C3 Rotary Encoder (Increment al/A bsolute)
●Mounting Procedure
Life of Bearin g
The following graph shows the (theoretical) life expectancy of the
bearing with radial and thrust loads imposed on the bearing.
Wiring
Connecting
•When extending the cable f or Incremental Rotary Encoders, select
the kind of cable with care by taking the response frequency into
consideration because the longer the cable is, the more the resid-
ual voltage increases due to the resistance of the cable and the
capacitance between the wires. As a result, the waveform will be
distorted.
We recommend the line driver output type model (E6C3-CWZ3XH)
or the complementary output type model (E6C3-CWZ5GH) if the
cable needs to be extended.
In order to reduce inductive noise, the cable must be as short as
possible, especially when the signal is input to an IC.
•If the power supply has surge voltage, connect a surge suppressor
between the positive and negativ e terminals of the po wer supply to
absorb the surge voltage.
•Unnecessary pulses are output at the time the E6C3 is turned ON
or OFF. After turning ON the E6C3, be sure to wait 0.1 s before
turning ON the peripheral devices connected to the E6C3 and turn
OFF the peripheral devices 0.1 s before turning OFF the E6C3.
Cable Extension
•The rise time of each output w av ef orm will increase when the cable
is extended. This affects the phase difference characteristics of
phases A and B.
The available length of cable varies with the response frequency
and noise. I t is safer to limit the length of cabl e to 10 m maximum. If
a longer cable of up to 100 m is required, use the line driver output
or complementary output model. (The maximum extension with the
line driver output model is 100 m.)
Note:Recommended Cable:
Cross section:0.2 mm2 with spiral shield
Conductor resistance:92 Ω/km max. at 20°C
Insulation resistance:5 MΩ/km min. at 20°C
•The rise time varies with the resistance of the cable and the kind of
cable as well as the length of the cable.
•The residual output voltage will increase according to the length of
the c able.
Preventing Miscounting
If the operation of the E6C3 is stopped near a signal rising or falling
edge, a wrong pulse may be generated, in which case the E6C3 will
miscount. In such a case, use an increment-decrement counter to
prevent miscounting.
Exte nsi o n of Li ne Driver O utp ut
•Be sure to use a shielded twisted-pair cable to extend a line driver
cable.
Recommended cable: Tachii Electric Wire Co., TKVVBS 4P 02A
•Use an RS-422A Receiver for the receiver side .
•The twisted-pair wires as shown in the follo wing illus tration are
suitable for RS-422A signal transmission. Normal mode noise can
be eliminated by twisting the wires because the generated electri-
cal forces on the lines cancel each other.
•Be sure the E6C3 is supplied with 5 VDC when a line driver output
is used. There will be an approximately 1-V voltage drop if the
cable length is 100 m.
1Insert the shaft into the coupling.
2Secure the Rotary Encoder.
3Secure the coupling.
4Connect the power and I/O lines.
5
Model Maximum insertion length
E69-C08B/E69-C68B 6.8 mm
Model Tightening torque
E69-C08/E69-C68B 0.44 N ⋅ m
Do not secure the coupling and shaft with screws at this
stage.
Refer to the following table for the maximum insertion length
of the shaft into the coupling.
Be sure to turn off the Rotary Encoder when connecting
the lines.
Turn on the Rotary Encoder and
check the output.
3.5
3.0
2.5
2.0
1.5
1.0
0.5
010 20 30 40 50 60 70 80 90 100
Radial load Wr (N)
Wa:
10N
Encoder
Wr: Radial load
Ws: Thrust load
Wa:
20N
Wa:
30N
Wa:
40N
Wa:
50N
Wa:
60N
Wr
Ws
Shaft
Life (× 1010 revolutions)
Twisted-pair
wires