45
11.1 Initial inspection
11. Inspection and Maintenance
11.
Inspection and Maintenance
11.1
Initial inspection
11.1.1 Confirmation of selection
• Before starting operation, check that the selected tension detector, actuator, power amplifier, servo
amplifier, etc. are optimal for operation.
• The actuator capacity is determined based on the "line speed
×
operating tension". The LE-30CTN tension
controller, however, can set the higher tension than this operating tension. If such a high tension is set for
operation, the actuator may be overloaded and burnd out.
For this reason, be sure to check whether the operator knows the upper limit of the operating tension, and
request the operator not to set any high tension that may overload the actuator.
• If the set tension is too low, the tension may fluctuate due to the inertia of the reel at the starting or stopping
operation or during acceleration or deceleration, and such fluctuation of the tension may cause difficulty in
operation.
For this reason, check whether the operator knows the minimum operation tension.
• The minimum drive tension which can be driven in torque control method can be calculated approximately
using the following formula.
11.1.2 Operation sequence check
• Check the operation sequence and the emergency stop sequence.
• Especially when the servo motor is used as an actuator, the motor may become out of order if the material
is cut. (The motor will rotate at the upper limit operation speed set for the speed limit terminal.)
Set the upper limit speed using the upper limit speed setting resistor as described in page 43. In addition,
set the material cut detector so that the motor speed can be reduced to zero after detection of material cut.
11.1.3 Wiring check
• Erroneous connection of the power terminal (Pay attention to the phase order in the motor system also.),
contact of the input/output cable with the power cable, and short-circuit of the output cable may cause
serious damage.
• Before turning on the power, make sure that the power and ground are connected correctly and that the
input/output cable is wired correctly.
• Never perform the megger test (measurement of insulation resistance).
v
(
)
t
V
(—)
t
f
f
W
: Minimum operating tension (N)
: Fully loaded rool mass (x10
3
kg)
: Acceleration/deceleration speed (m/min/s)
W+0.2
> 8.5
100
200
300
0
0
10
15
20
30
Minimum operating
tension (N)
Fully loaded rool mass (x10
3
kg)
0.5
1.0
1.5
Acceleration/deceleration
speed (m/min/s)
25
Содержание LE-30CTN
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Страница 64: ...JZ990D33401D TENSION CONTROLLER MODEL LE 30CTN ...