In paper conversion, finishing& printed film processing, material has to be cut to required preset lengths, with accuracy and repeatability. A typical system comprises of a draw roller and one or two rotary cutters which are synchronized with the draw rollers to give the desired cut length.
Application requirements
Variable length setting
Accuracy and consistency
Minimum setting time
High speed operation
Simple to operate
Features
Zero setting timel
Excellent accuracy & repeatability
Negligible paper wastage
Energy efficient
Maintenance free
Programmable length setting
Eliminates PIV gear boxes, prone to maintenance
Cutting with registration mark
Application SolutionTwo separate AC Induction motors are used. One motor is coupled to the draw roller and another is coupled to the rotary cutter. The operator sets the line speed which decides the draw roller RPM. The Rottary Cutter is electronically geared with the draw roller. The Rotary Cutter exactly follows the draw roller with a set ration. The ratio remains undisturbed during acceleration. This feature is called the zero backlash electronic gearing, with programmable gear ratio. This close loop control system measures sheet length accuracy at every cut. The number of controlled motors depends on the application, as well as either simplex or duplex.
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Sanjay Gupta (Electronica Machine Tools Ltd.)
Elektra Chambers 44, Mukund Nagar, Mukundnagar, Pune, Maharashtra - 411037, India
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