71
Dancer control with winding diameter
compensation for wiredrawing machine
(3) Example 2 of FR-A700-A1 parameter setting
[Machine specification] Winding shaft of wiredrawing machine
Minimum diameter: 280mm, Maximum diameter: 400mm
Gear ratio: 1/1.2 , Maximum line speed: 2000m/min
Dancer signal: 0 to 10V input
Main speed command: 0 to 10V analog signal (with 90s of acceleration/deceleration cushion time)
Initial winding diameter calculation: disabled
Diameter storage: enabled, Tension setting output: unnecessary
Parameter
Name
Initial
Value
Setting
Description
7
Acceleration time
5s
0.1s
Setting to perform dancer control
(0.1s is set for EMI influence. Performance of dancer control
deteriorates if the setting is too large.)
8
Deceleration time
5s
0.1s
9
Electronic thermal O/L relay
Rated
inverter
current
0A
For vector control dedicated motor (motor overheat protection by
Klixon)
10
DC injection brake operation frequency
3Hz
0Hz
13
Starting frequency
0.5Hz
0Hz
52
DU/PU main display data selection
0
4042
Setting for monitors ("4042": winding diameter(40) is set in the
second monitor, line speed (42) is set in the third monitor.)
Other monitor settings related to dancer control
27: Dancer position (%), 41: Main speed, 43: Dancer
compensation speed, 44: Winding diameter compensation speed,
45: Winding/unwinding length, 54: Dancer position deviation
71
Applied motor
0
30
Mitsubishi vector control dedicated motor (SF-V5RU)
73
Analog input selection
1
0
Main speed (terminal 2) 0 to 10V, dancer (terminal 1)
10 setting,
polarity irreversible
79
Operation mode selection
0
2
Fixed to External operation mode
80
Motor capacity
9999
7.5kW
81
Number of motor poles
9999
4P
125
Terminal 2 frequency setting gain
frequency
60Hz
90.95Hz
Setting is made according to the rotation speed at V
max,
D
min
and
the speed command at the time (maximum voltage command for
terminal 2 to 5.)
=V
max
/(
D
min
gear ratio)
128
PID action selection
10
41
Dancer control (forward action)
(Compensation direction is reversed when minimum dancer input
is 8V and maximum is 2V)
129
PID proportional band
100%
250%
130
PID integral time
1s
5s
133
Target dancer position
500%
550.0%
Upper and lower limit dancer positions (set
Pr. 52
= "27" to show
%) are confirmed before setting target dancer position.
134
PID differential time
9999
0.05s
Setting to suppress transient fluctuation caused by traverse edge.
Should be set gradually starting from 0.01s to bear mechanical
disturbance (fluctuation).
(Should be cautious as it causes hunting.)
180
RL terminal function selection
0
83
When dancer/winding diameter compensation are enabled ... X83
signal is ON. (Setting must be made when dancer control function
is used.)
181
RM terminal function selection
1
55
Diameter storage clear: cleared by X55 signal is ON.
186
CS terminal function selection
6
7
To input external signal of Klixon for SF-V5RU.
242
Terminal 1 added compensation
amount (terminal 2)
100%
0%
Dancer signal input is not added when normal operation is
performed with X83 OFF. (No terminal 1 added compensation)
369
Number of encoder pulses
1024
2048
706
Speed compensation gain
0%
100%
Setting when compensation rate needs to be constant. Setting for
X35 is not necessary.
707
Sampling time for winding diameter
calculation
9999
1s
Setting to make operation smooth by filtering winding diameter
calculation.
