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EMG strip guiding systems: Know-how for the user 02

02 Strip guiding on the recoiler

In this and in the following articles of this series, we summarize know-how on the use of EMG strip guiding systems and try to give you the necessary basics for the planning of the applicable components and for the design of the systems.

Previously published: 01 Strip guiding on the uncoiler

Recoiler strip guiding - Application area
Strip guiding on the recoiler ensures coils with straight side surfaces, which prevents damage to strip edges during further transport and handling. To achieve this aim, strip edge guiding systems are generally used for this application. Strip center control only makes sense if coils with unprocessed edges are to be wound up and fed centrally to further processing steps. In principle, the winding quality is an important factor in quality evaluation.

Since it is not guaranteed that the strip always exits the treatment process at the same point, the recoiler is guided along the lateral movements so that a straight wound coil is produced.

With all recoiler guidings, the strip edge measurement (optical or inductive) must be located in the immediate vicinity of the deflection roll and connected to the movable part of the recoiler. 

Important to know!
This connection can be made mechanically or, as in the example above, electrically by means of a separate synchronous control. It is crucial that the strip adheres to the deflection roll and does not slip or incline. Therefore, a good wrapping angle and a sufficent coefficient of friction at the idler roll must be ensured with a correspondingly large strip tension. Large roll diameters are advantageous.

For the winding of strips with a slight edge thickening, which can occur with a surface coating, the system is extended by the function of staggered winding. A constant pattern of the toothed coil edge is achieved by considering the reel speed and strip thickness in the control.

In summary - Which EMG components do I need?
The essential components are:

know-how in design, construction and installation. You will find all this at EMG!

What happens next?
Our sales and service staff, our international sales organization or our product manager Mr. Martin Wied ( can offer you concrete advice on the design of your control system at any time.


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