The main advantage of a dual motor drive is that each work roll is individually driven. If one roll gets damaged and needs to be ground down, the other roll does not have to be ground down to the same diameter. This allows each motor drive to compensate for the different diameters.
Many architectural materials are embossed for beauty and appearance. Metals can be embossed and painted to look like wood. The inside of an elevator has embossed material. Some cold rolled is rolled with a satin finish so that it has more area to fuse to the paint or galvanized surface.
Expanded metal is a common product throughout the world and much expanded metal goes through a rolling mill. These are normally very large 2-high or 4-high rolling mills that are very expensive. The top two rolls is where the reduction is taking place.
Precision measuring normally requires an entrance gauge, which records the thickness of the material going into the rolling mill.
