4D1 width change on roller

Case 1:

Micro-Slippage from Strain Change

4B1 CD shift from misalignment web or roller

Case 2:

Insufficient Traction for Perpendicular Entry

4D3 helical wrap CD shift

Case 3:

Helical Wrap

4D4 cd slip on spreader roller

Case 4:

Excessive Spreading Geometry