Length Accuracy

Two types, stop-to-cut type with guillotine shear or non-stop cutting type with rotary or flying shear. The differences are as below table.

ItemType

Stop-to-cut

Non-stop cutting

Shear type

Guillotine shear

Rotary or flying shear

Shear drive

Hydraulic

Servo motor

Cutting process

Feeding – stop – waiting shear to cut (one cycle)

Non-stop feeding & shear tracking length to cut

Material thickness

0.2~ 25mmT

0.2~ 4.5mmT

Scratch on surface

No scratch

No scratch

Roll mark on surface

Depends on material

No mark

Critical required surface

Not recommended

Recommended

Productivity

As standard base

About 2~5 times higher

In short, the advantage of rotary shear and flying shear is faster production speed, no roller mark on material surface, and that of guillotine shear is cost lower.

EPC is the initial of “Edge Position Control” which is important for the quality products of both cut-to-length machine and slitting machine. 

The EPC starts functional from Uncoiler positioning to follow the side guide before leveler. 

EPC dynamically keep the material coil  edge aligned constantly so to make sure diagonal accuracy of cut sheets or edge straightness of slit strips.

If without EPC, especially when the thin material coil band is off edge line, coil band might get damaged on the edge whilst coping with side guides which try to force the band edge back to the line,