Make your paper converting techniques more efficient and flexible with our exceptional pull roll control drive.

Unico’s Smart Pull Roll Drive is a digital signal processor (DSP) based variable speed drive with an embedded software block to control the in-feed, and exit pull rolls of a rotary cutoff. The program offers several programmable features that enable OEMs, integrators, and users to customize the functionality of the software to the application. The incredible features of pull roll control include intelligent web tension control, various modes of operation, flexibility and ease of use, smart AC digital drives, communication protocols, and many input and output options.

You can also monitor the progress of your precise manufacturing by not being physically present with our super-tech monitoring system.

Features

Intelligent Web Tension Control

The drive intelligently regulates pull roll speed to maintain constant web tension at the infeed of the rotary cutoff. This minimizes length variation errors and eliminates the constant adjustment of roll pressure that can damage the material or cause slippage. The drive runs in velocity mode with position-loop tuning to minimize velocity error while accelerating or decelerating, thereby eliminating web droop between the slitter/scorer and infeed pull roll sections.

Minimizes Roll Wear

The drive monitors dry-end conditions to provide a stable pull roll speed. This dramatically reduces roll wear and eliminates the needless expense and downtime of replacing worn-out rolls.

Controlled Tailout

Controlled speed and tension provide a smooth transition into an automatic order change (AOC), eliminating excessive cut length variation upon tailout. When the liners of the web come through loose or unglued, the pull roll maintains a tight web to prevent jams due to paper wadding. Since the drive has lineal tracking capability, it can sequence the slitter/scorer after the tail of the order using a digital output.

Flexibility and Ease of Use

The software allows the user to easily adjust the velocity and acceleration rates as well as to set up and tune the drive. Fault messages and warning indications are provided for the machine operator. An alphanumeric display shows current drive speed, drive state, and drive status. Analog outputs are available to provide other drives or controls with proportional references of drive speed and/or torque. The drive supports UEdit®, Unico’s Windows-based IEC 1131 standard ladder-logic and function-block programming package that provides even greater customization and flexibility. The drive is ideal for retrofits and seamlessly interfaces into existing logic and with other logic controllers.

Smart AC Digital Drives

Unico’s 1000 and 2000 drive families provide powerful, flexible digital flux vector control for sophisticated, performance-oriented applications. The drives have been designed for complete flexibility and offer a variety of feedback, programmable I/O, and communication options. They incorporate a number of energy-conserving features, including line regenerative capabilities for exporting energy back to the power grid. Both drive families can take advantage of a modular DC bus configuration for sharing or recirculating energy among multiple drives.

Communication Protocols

The drive supports a variety of serial communication protocols for connecting to virtually any PLC or HMI. The drive can also operate in a stand-alone mode using the built-in keypad/display with an ANSI protocol connection to a simple serial display unit.

  • CANopen
  • CC-Link
  • ControlNet
  • DeviceNet
  • Ethernet
  • Interbus
  • Modbus Plus
  • Modbus RTU
  • Profibus
  • Remote I/O†
  • RS-232/422/485
  • †Supported only by the 2000 family platform

Inputs & Outputs

All inputs and outputs are user-enabled and are mapped to hardware I/O points to allow customization of the control. They are also accessible through a high-speed serial communication link.

Inputs Outputs
motor on request motor on grant
fault reset no fault
motion enable forward motion
automatic/run mode reverse motion
jog forward automatic
jog reverse manual
increase speed/accel at zero velocity
decrease speed/decel at requested velocity
resume speed at max velocity
velocity select 0 no warning
velocity select 1 motor RMS warning
velocity select 2 thermal warning
velocity select 3 tracking preset
tracking start
blower motor OK

Specifications

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Unico Features

Specification

Input200 to 690 V AC, three-phase
Voltage50 / 60 Hz
Frequency> 99%
Power Factor< 5%
Isolation TransformerYes
Unico Features

Specification

Input200 to 690 V AC, three-phase
Voltage50 / 60 Hz
Frequency> 99%
Power Factor< 5%
Isolation TransformerYes
Unico Features

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Input 200 to 690 V AC, three-phase
Voltage 50 / 60 Hz
Frequency > 99%
Power Factor < 5%
Isolation Transformer Yes
Unico Features

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Input 200 to 690 V AC, three-phase
Voltage 50 / 60 Hz
Frequency > 99%
Power Factor < 5%
Isolation Transformer Yes

Block Diagrams

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Brochures

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Resources

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Application used for Automotive

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Battery

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Inverter

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Inverter

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Battery

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Inverter

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Battery

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Inverter

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Battery

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Inverter

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Battery

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Fuel Cell

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Frequently
Asked Questions

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