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Inverters-FREQROL-A800 Plus Series -FREQROL-A800 Plus for Roll to Roll-
Wide range of applications
- Feature
- Especificación
- Normas
- Discontinued
Wide range of applications 
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.
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.
Example of dancer feedback speed control
Wire drawing machine
Dancer feedback speed control
The control function is useful for winding in the wire drawing machine. High-speed winding is offered for high-inertia loads.
The wire drawing section pulls the wire at a constant speed to make the wire thinner. For the winding shaft, the inverter provides dancer feedback speed control to keep the dancer roll position, achieving constant tension winding.
In addition, using the winding diameter calculation function, the circumferential speed of the winding reel is kept constant.
Some systems require peripheral devices such as regenerative options.
- 1Inverter FR-A800-R2R(with the FR-A8AP*1 installed)
-
2Inverter FR-A800-R2R
(with the FR-A8AP*1、and FR-A8AZ*2 installed) - 3Encoder-equipped motor SF-PR-SC
- 4Dancer roll
- 5Speed detector
The products in the parentheses are plug-in options.
- *1Used for vector control.
- *2Used for the line speed output.
■ Relevant functions
Dancer feedback speed control
ABD
The unwinding shaft rotation speed is controlled to keep the dancer roll position constant. The wire tension is kept constant.
Winding diameter calculation function D
The circumferential speed of the winding shaft is kept constant by calculating the winding diameter of the winding shaft. Hunting can be reduced in dancer roll control.
Initial winding diameter calculation D
The present winding diameter is calculated based on the dancer roll movement at a start from the lower limit position to the target position.
Speed control proportional gain
compensation D
Al ajustar el incremento proporcional del control de velocidad de acuerdo con el diámetro de bobinado, el nivel de respuesta se puede mantener constante.
Tension PI gain tuning
ABD
By automatically adjusting the tension PI gain, time required for adjustment is significantly cut down. Anyone can start the system easily.
The torque is controlled for keeping a constant tension on the workpiece (winding/unwinding shaft) by using the tension sensor and line speed information. Further stable torque control is possible by changing the torque command according to the acceleration/deceleration torque calculation at a speed change (inertia compensation) and the mechanical loss torque compensation, as well as the compensation determined by the winding diameter calculation.
Example of tension sensorless torque control
Máquina impresora
Tension sensorless torque control
The control function is useful for winding in the printer. The paper can be rolled up without using dancer rolls or tension controllers.
When the paper feed speed of the printer is increased (or decreased), the inverter changes the torque command 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.
- 1Inverter FR-A800-R2R(FR-A8AP*1installed)
-
2Inverter FR-A800-R2R
(with the FR-A8AP*1ã€and FR-A8AZ*2 installed) - 3Encoder-equipped motor SF-PR-SC
- 4Printing unit
- 5Nip roll
- 6Speed detector
The products in the parentheses are plug-in options.
- *1Used for vector control.
- *2Used for the thermistor input.
■ Relevant functions
Tension sensorless torque control B
The winding diameter is calculated from line speed information, and the torque is controlled for keeping a constant tension on the winding shaft.
Inertia compensation function B
Even if the paper feed speed increases or decreases, the tension applied to the paper is maintained constant.
Mechanical loss compensation function B
The torque command value is increased for mechanical loss compensation to prevent the tension from changing.
Taper function B
By adjusting the tension on the workpiece, it is possible to avoid imperfections such as wrinkles or deformation caused by the increase in diameter.
