" KMT " Tracking roller assembly (TRA) consists of two rectangular steel tubing frames. One is stationery, the other is movable; it is supported in a BEARING GuideThe Principle:
The improper mounting of the detector and improper arrangement of the rolls will result in unsatisfactory control performance, or will cause wrinkles to the web.
When planning and aligning the process line, the following described items must kept in mind. If distance is too short, winkles will happened on thin or soft web.
when needed to correct web position in the middle of the process line, there are two methods to modify the web edge.
This method best applied to the webs of novelistic materials, or distortions web due to the difference tension of both side.
The web hardly slips on this guide roll, since there has two 90°wrapped angle. If it is slips, use a rubber coated roll will prevent slip age occurs.
This method particularly good for flexible web. It is available, when location in long distance between entry idler roll and exit idler roll. The assumed pivot of the guide roll rotation be arranged to be long, so turning angle of the guider rolls and the tension variation are lesser, will reducing the wrapping of the web. There have 90° wrap for single roll and 180° wrap for double rolls shown as below.
Whenever the film roll is not feeding in order, it could be adjusted by EPC control unit and the film feeding will be corrected to the right position. This system will enhance the productivity of machine and there will provide one set of EPC for each line.
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