how to eliminate wrinkles at the beginning of winding? They are daughter coils that are cut over 1200mm wide and always have wrinkles at the beginning of the winding
My guess is that it is a wrinkle at a small angle. If so, something is crooked, uneven, different, misaligned ... What could that be? The web and anything that touches the web within 1 meter of the wound roll, including core, layoff roller ... That is a long list.
Speed in itself should make no difference unless you are SIMULTANEOUSLY: not narrow, not slow and not rough/porous. Much much more likely is poor tension control during the portions of the splicing event. Tension should be held firmly all the way to dead stop, the splice must be made at zero (not slack) tension, tension should be reestablished before restarting and tension should be held all the way to top speed. Many rewinders (if that is what you have), particularly with manual brakes, can't do this well.
@@DavidRoisum Thank you! We are constantly having this issue. We have master rolls with splices already in them on the unwind and when we run them through the machine at speed they are causing starring in the finished roll. I think if we increase tension in the settings it might help.
how to eliminate wrinkles at the beginning of winding? They are daughter coils that are cut over 1200mm wide and always have wrinkles at the beginning of the winding
My guess is that it is a wrinkle at a small angle. If so, something is crooked, uneven, different, misaligned ... What could that be? The web and anything that touches the web within 1 meter of the wound roll, including core, layoff roller ... That is a long list.
How would you prevent starring in a roll at a splice? Would slowing the machine down help or create more of a problem?
Speed in itself should make no difference unless you are SIMULTANEOUSLY: not narrow, not slow and not rough/porous. Much much more likely is poor tension control during the portions of the splicing event. Tension should be held firmly all the way to dead stop, the splice must be made at zero (not slack) tension, tension should be reestablished before restarting and tension should be held all the way to top speed. Many rewinders (if that is what you have), particularly with manual brakes, can't do this well.
@@DavidRoisum Thank you! We are constantly having this issue. We have master rolls with splices already in them on the unwind and when we run them through the machine at speed they are causing starring in the finished roll. I think if we increase tension in the settings it might help.