Servo Knife Unit

This Servo Knife Unit can provide very high cycling rates due to the fact that there is no target to obstruct the core. An encoder is able to measure the speed of the inside ply. The operator enters, on a touch screen keypad, the core inside diameter and the width of the inside ply. This then synchronises the cutting unit to the core speed. The operator can then enter the desired cut length and the machine will then cut this exactly at all speeds. Fine tuning of cut length and/or speed is able to be done while the machine is running if, for example, the operator has entered the wrong information. When the knife is cutting a ‘bullet’ on a rod inside the tube can prevent the tube being crushed under the cutting force. This ‘bullet’ is then released to travel at the same speed as the tube and requires your winding mandrels to be hollow. The smallest diameter for the mandrel is limited to 25mm by the need for the through rod connected to the ‘bullet’. The carriage speed is determined by the tube itself, so any belt slip does not affect the cut length.