7. WEB Control Application
7-7
7.4.10 Rewind/Unwind Function Setting (Compulsory)
Tension control is divided into three (3) method; First, Unwind Function – tension control in such manner as time
goes by the diameter of material gets smaller keeping rewinding; Second, tension control of a fixed roll such as
Bridle Roll or Nip Roll; Lastly, Wind or Rewind Function – tension control in such manner as time goes by the
diameter of material gets larger keeping winding. In case of setting Rewind/Unwind function, please set to
“Rewind” when winding the material in WEB_17 Re/Un Wind or when it is Bridle Roll or Nip Roll, while set to
“Unwind” when unwinding the material. Motor rotating direction and splicing operation direction is decided
depending on the setting of WEB_17 Re/Un Wind.
① When it is Bridle Roll or Nip Roll, or in case of winding the material;
② In case of unwinding material
7.4.11 Overwind/Underwind Function Setting (Compulsory)
In case of Rewinding or Unwinding, there are two kinds of method depending on the location when winding or
unwinding the material; First – Overwinding that is winding or unwinding the material from the upper part, Second
– Underwinding that is winding or unwinding the material from the lower part. Roll rotating direction and PID
output are decided depending on the setting of inverter operation command, WEB_17 Re/Un Wind, and WEB_18
O/U Wind. Selection of Overwind/Underwind function can be set in WEB_18 O/U Wind.
① In case of winding or unwinding the material from the upper part;
② In case of winding or unwinding the material from the lower part;
Following figure and table shows line speed command, PID output command, splicing command direction
following the setting of Rewind/Unwind function and Overwind/Underwind function. For further
detail, please refer to the explanation on WEB group.
EB▶ Re/Un Wind
17 Rewin
EB▶ Re/Un Wind
17 Unwin
EB▶ O/U Wind
18 Overwin
EB▶ O/U Wind
18 Underwin
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