To guide the products into the right position or direction
Adjust Guide Rail width: Put three object at position A, B, and C align to reference side rail.
Adjust Guide Rail width: Loose adjustment lock, C and D, then push adjustment side rail to close object.
WARNING: If the guide rail’s width is not adjusted to conform with the object’s dimensions, this will affect the precision of the applied labels. So it is very important to adjust the guide rails according to the objects dimension. The margin must be minimal.