27
7.2 Control of excessive sag or tension in material during acceleration
and deceleration
The following control is possible to limit the tension variation by material inertia during abrupt acceleration
or deceleration of the machine.
Gain 1 : While the input at terminal MC3 is on, the control output is 5 to 400% of the control output before
the MC3 was turned on. This function makes the acceleration inertia compensation or deceler-
ation inertia compensation possible.
In the unwinding control, for example, the acceleration inertia compensation is possible by turn-
ing on the MC3 input with controlling gain 1 at 100% or less during the acceleration. The de-
celeration inertia compensation is possible by turning it on and controlling the gain at 100%or
more.
Gain 2 :While terminal MC5 or MC6 is on, the gain 2 settings are valid in the similar manner as described
above.
As an example, gain 1 may be used during acceleration and gain 2 during deceleration.
• Use the micro signal switch commensurate with DC8V 4mA
as the input contacts.
• Connect the gain 1 contact signal to MC3. Connect the gain
2 contact signal to MC5 or MC6, whichever is used.
• Use the "OUT.GAIN" screen within "START / STOP" on the engineer screen to change the setting val-
ue of gain 1 and gain 2.
• Use the "MC5" or "MC6" setting screen within "SWITCH" on the initial setting screen or the engineer
screen to set the gain 2 contact or change settings.
1. Setting
Acceleration
Deceleration
Stop
Time
Stop gain
+ Stop bias
Start timer
Gain 1
C
ontrol
output
Speed
Terminal
Unwinding
control example
Stop timer
Time
Stall
Gain 1
Gain 2
Stall
ON
OFF
Start/stop
Gain 1
Gain 2
MC1
MC3
MC5
or
MC6
2. Connection
Photo coupler
1.6k
Ω
8V
MC5
MC6
MC3
Gain 1
Gain 2
MCC
3. Setting
Use the numeral input keys to set the data.
O
T .
G A I N
M E N U #
S E T
O U T P U T
G A I N
G A I N 1
→
# # # %
:
G A I N 2
→
# # # %
U
M
5
S E L E C T
M C 5
I N P U T
G A I N 2
:
I N C H N G
:
O U T
R M T . :
C U T
T R Q .
C
Select "GAIN2"
Summary of Contents for LE-40MTB-E
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