A method for sharpening a skate blade, comprising: providing an automatic sharpening apparatus having a holder ; placing a blade into the holder ; a grinding-wheel driving motor , in operative engagement with a wheel on a spindle , rotating grinding wheels via a belt , the grinding wheels being disposed side by side on a common spindle ; a linear motor moving the grinding wheels from a first position to a second position in a vertical z-direction without moving the grinding-wheel driving motor relative to the automatic sharpening apparatus ; a selected rotating grinding wheel engaging the skate blade ; and the selected grinding wheel sharpening the skate blade , characterized in that the method further comprises: a grinding assembly motor moving the grinding wheels in a horizontal x-direction along the apparatus towards the skate blade ; and a precision member controlling the position of the grinding wheels in the y-direction regardless of the position of the grinding wheels in the z-direction and x-direction by using a guide and a sliding member that is slidable along the said guide , wherein the precision member is used to move the grinding wheels, the precision member pulls in or pushes out a fastener and a rod to move a whole assembly of a holder , a driving center and the grinding wheels so that the grinding wheels slide on a spindle relative to the motor until the selected grinding wheel is in a position (F), when the selected grinding wheel is in the position (F), the selected grinding wheel is lined up with the blade in order to sharpen the blade . providing an automatic sharpening apparatus having a holder ; placing a blade into the holder ; a grinding-wheel driving motor , in operative engagement with a wheel on a spindle , rotating grinding wheels via a belt , the grinding wheels being disposed side by side on a common spindle ; a linear motor moving the grinding wheels from a first position to a second position in a vertical z-direction without moving the grinding-wheel driving motor relative to the automatic sharpening apparatus ; a selected rotating grinding wheel engaging the skate blade ; and the selected grinding wheel sharpening the skate blade , characterized in that the method further comprises: a grinding assembly motor moving the grinding wheels in a horizontal x-direction along the apparatus towards the skate blade ; and a precision member controlling the position of the grinding wheels in the y-direction regardless of the position of the grinding wheels in the z-direction and x-direction by using a guide and a sliding member that is slidable along the said guide , wherein the precision member is used to move the grinding wheels, the precision member pulls in or pushes out a fastener and a rod to move a whole assembly of a holder , a driving center and the grinding wheels so that the grinding wheels slide on a spindle relative to the motor until the selected grinding wheel is in a position (F), when the selected grinding wheel is in the position (F), the selected grinding wheel is lined up with the blade in order to sharpen the blade . a grinding assembly motor moving the grinding wheels in a horizontal x-direction along the apparatus towards the skate blade ; and a precision member controlling the position of the grinding wheels in the y-direction regardless of the position of the grinding wheels in the z-direction and x-direction by using a guide and a sliding member that is slidable along the said guide , wherein the precision member is used to move the grinding wheels, the precision member pulls in or pushes out a fastener and a rod to move a whole assembly of a holder , a driving center and the grinding wheels so that the grinding wheels slide on a spindle relative to the motor until the selected grinding wheel is in a position (F), when the selected grinding wheel is in the position (F), the selected grinding wheel is lined up with the blade in order to sharpen the blade . <EOS>