Grinding wheel dressing, usually divided into two processes of shaping and dressing. Trace cutting shaping is grinding wheel  to achieve the desired geometric shape and accuracy, and the abrasive tip fine crushing, the formation of micro edge; Truing is the binding agent between the removal abrasive, so that abrasive wheel between the chip space, and abrasive grains projecting outside the binding agent, forming a cutting edge.
For multi-stomatal vitrified bond grinding wheel (including diamond and CBN grinding wheel), due to the combination of agent for osteoporosis, usually plastic and dressing at once; binder Dense wheel (such as resin, metal binding agent) , shaping and dressing respectively.

The abrasive tools  grinding wheel is the most effective devaluation diamond dressing tool. Single particle diamond dresser, dressing tool wear, and often will affect the type of surface accuracy. Diamond roller dressing avoid dressing tool wear too fast, and to get a better wheel morphology. The dressing device feed higher precision, each feed rate should be controlled at the micron level. Excessive trimming both affect the grinding quality, will greatly reduce wheel life.
Truing many ways, generally using a mechanical method (such as cut corundum block dressing the hydraulic injection Dressing law) or electrical processing method. The latter are used for metal bond grinding wheel, in addition to the erosion of the wheel as the anode metal bond spark or electrolysis; adding graphite powder in the binder, this law also applies to the resin, ceramic bonded grinding wheel.