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Printing machine
Tension sensorless
torque control
Reference shaft
Actual line speed
Motor speed
When the paper feed speed of the printer is increased
(or decreased), the inverter changes the torque com-
mand value according to the inertia of the paper roll to
give the acceleration (or deceleration torque) to keep
a constant tension. Also, the taper setting can be
used to avoid imperfections such as wrinkles or
deformation caused by the increase in diameter.
Some systems require peripheral devices such as regenerative options.
Relevant functions
Tension sensorless
torque control
The winding diameter is calculated
from line speed information, and the
torque is controlled for keeping a con-
stant tension on the winding shaft.
The control function is useful for winding in the printer. The paper can be rolled up
without using dancer rolls or tension controllers.
Winding shaft
Inertia compensation acceleration/deceleration signal
Taper function
By adjusting the tension on the work-
piece, it is possible to avoid imperfec-
tions such as wrinkles or deformation
caused by the increase in diameter.
Inertia compensation
function
Even if the paper feed speed increases
or decreases, the tension applied to
the paper is maintained constant.
Inverter
FR-A800-R2R
(with the FR-A8AP*
1
installed)
Inverter
FR-A800-R2R
(with the FR-A8AP*
and FR-A8AZ*
installed)
1
2
Encoder-equipped motor
SF-PR-SC
The products in the parentheses are plug-in options.
Mechanical loss
compensation function
The torque command value is increased
for mechanical loss compensation to
prevent the tension from changing.
Features
Printing unit
Nip roll
Speed detector
*1 Used for vector control.
*2 Used for the thermistor input.
1
13
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