Taper is the difference between the top profile of the cut versis the bottom profile. The biggest causes of taper are: Distance of nozzle from material. The closer you can get the nozzle to the material, the less the taper. Hardness of material (usually harder materials exhibit the least taper) Speed of cut. Machine too fast and get taper in one direction; machine too slow and get taper in the other direction. Quality of jet exiting the nozzle. The more focused the nozzle, the less taper exhibited. Quality of abrasive used. Thickness of material (thinner materials tend to exhibit more taper than thicker materials) Some machines have the capability to remove V and reverse taper by simply tilting the cutting head to compensate, or cutting at a pre-determined speed to minimize the taper.
A measure of the flatness of a wafer, taper being thicker at the edges than at the center
the style of having the hair cut getting progressively shorter lower down towards the nape of the head. This is generally done with electric clippers and gives a crisper, freshly cut look. The degree of tapering can range from a slight taper to a style in which the hair around the nape and around the ears is completely shaven.