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Web AOC Shear Control

Unico’s Smart Web AOC Shear Drive can be used alone or as part of a multidrive corrugator dry-end system. The drive controls the shear during automatic-orderchange (AOC) sequence and during scrap chop-out. The drive uses the same control algorithm as the Unico rotary cutoff knife drives and is therefore superior to typical drive packages.


The system consists of a Unico 2000 family or 1000 family flux vector AC drive and a properly sized AC motor. A parallel interface module with 32 points of optically isolated, configurable I/O is supplied with the system. Optional communication interface modules support high-speed communications with a programmable logic controller (PLC). The same functionality and performance is available with the 1000 family drive platform with some limitations on hardware-mapped I/O and high-speed serial communications.


The software provided in the drive is Unico’s standard embedded RCO software with additional, pre-engineered UEdit® AOC shear functionality. The shear portion of the program can be modified using standard IEC 1131 ladder diagrams and function blocks to further customize the drive for a particular installation.

Chop-Out After Line Stop

The system provides a means by which the shear will automatically chop out a preset length of material after the line has stopped for a selectable time period.

Chop-Out Wet-End Scrap

The embedded AOC shear software will track scrap material when initiated by a push button or other wet-end signal and chop it out when it reaches the shear.

Scrap Reject Gate Control

The software is capable of controlling the scrap reject gate in real time with feed-forward timing to compensate for electromechanical delays during scrap chop-out mode.

Scrap Jam Prevention

Once a chop-out has been completed, the shear drive will not allow another until enough material has passed into the dry end. This eliminates jam-ups caused by short lengths of material getting stuck between the web shear and the cut-off knife.

Automatic Reference/Homing

Upon power-up, the shear will automatically go to a home position. The system readies itself for the first chop-out without operator intervention.

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 • Ethernet • Profibus
• CC-Link • Interbus • Remote I/O†
• ControlNet • Modbus Plus • RS-232/422/485
• DeviceNet • Modbus RTU  
 †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 highspeed serial communication link.



• motor on

• motor on

• fast stop

• no fault

• automatic

• reject gate close

• continuous cut

• reject gate open

• single cut

• shear cutting

• jog forward

• shear ready

• jog reverse


• reference/home/auto


• scrap track


• scrap bin full


• motor air flow OK


• motor thermal OK