Overlapping
There are mainly two causes which cause the problem of overlapping with ends of overlapping not meeting each other neatly
First cause is the steel coils are not evenly cut or slit during the process of slitting which naturally cause the overlapping ends not aligned with seal's section
Solution: adjust the blades of slitting machine to let all the coils slit in parallel level
Second cause is that the feeding guide wheels are not adjusted before the production
Adjust the four wheels in feeding system until the coils are 100% parallel with four guide wheels as shown below video
more at web page below:
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