What is a Flying Saw ?

In a flying saw web-cut application, the material to be cut is fed on a continuous conveyor that is driven by an open-loop motor. The saw is mounted on a carriage under servo control that runs parallel to the conveyor. The saw accelerates to meet the velocity of the material to perform the cut at the correct location. When the cut is complete, the saw rapidly decelerates and moves back to the starting position to begin the next cutting cycle. This results in equal length pieces of material being fed to the next machine process.

Flying saw applications don’t always involve a saw and they can be utilized in a variety of industries for: Steel / paper cutting, wood machining, drilling / embossing, filling / sorting…


There are 2 typical types for starting of the synchronisation:

1. Cutting length control

An encoder on the material registers the material speed and position of the production process. A length calculator calculates equidistant lengths in the controller and generates a start signal for the synchronising process. The advantage of cutting length control is that no cutting marks are required on the material.

2. Cutting mark control

A sensor registers the cutting marks present on the material. This sensor signal is processed as an interrupt in the drive and starts the sawing process. This method is used if there are cutting marks on the material which have to be referred to, e.g. when using printed materials.


Typical construction of a flying saw :

(Click to enlarge)


Configuration:

1* MR-MQ100

1* MR-J3-_B with MR-J3 Motor

1* External incremental Encoder (Open collector/Differential line driver)

1* External sensor 24V for mark detection