The importance of dressing and truing abrasive grinding wheels can never be over-emphasized. Dressing will restore the exposure and cutting ability of the abrasives on the wheel surface. Dressing must be performed after truing or whenever the wheel surface becomes locaded or glazed, or has lost its cutting ability. Dressing removes the unwanted residue, such as braze and steel particles, from the wheel surface. Dressing also removes a certain small portion of the bond material and exposes the abrasives, thus allowing for effective cutting action. Trueing is the procedure for eliminating any unwanted "run-out" once the wheel has been mounted. Truing is best done wet. In general, there are four types of dressers:
1) Single point diamond dressers 2) Multi-point diamond dressers 3) Forming diamond dressers 4) Impregnated diamond dressers
