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Features
The FR-A800-R2R inverter offers four types of control functions which enable the use in various system applications such
as winding/unwinding in the wire drawing machines and printers.
1
Dancer feedback
speed control
During dancer feedback speed control, speed is controlled for keeping a constant tension on the workpiece
(winding/unwinding shaft) by using the dancer roll position and line speed data.
Further stable speed control is possible by performing PID control and winding diameter calculation in the inverter.
Tension sensor feedback speed control is a control function to keep the tension constant using feedback from the tension
sensor, instead of the dancer roll position.
Dancer roll
Actual line speed
Motor speed
Dancer roll position
Line speed command
10
Wide range of applications
Tension sensor
feedback speed control
Speed detector
Example of dancer feedback speed control
Tension sensorless
Tension sensor feedback
torque control
Functions integrated into the inverter
PID control
set point
Dancer roll
PID calculation
position
Winding diameter
Actual line
calculation
speed
Acceleration/
Line speed
command
deceleration
torque control
Speed control
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