After the grinding wheel has been in use for a period of time, the surface of its diamond abrasive working layer tends to become tilted and uneven. 

If the surface of the diamond abrasive working layer is tilted, it will directly reduce grinding accuracy, causing dimensional deviation, burrs and scratches on workpieces. 

It will also generate obvious vibration and weaken running stability during processing.

In addition, it leads to local over-wear, premature passivation and shedding of diamond grains, shortening the service life of the grinding wheel and reducing grinding efficiency. 

Long-term eccentric operation will increase equipment load, and bring potential risks such as edge chipping and wheel cracking.

In this case, take a fine, smooth sharpening stone, place the grinding wheel upside down on the stone, and grind it in circular motions. 

During the process, keep close observation at all times. After a few rotations, lift up the grinding wheel to check its flatness before continuing the grinding operation. 

Repeat this step until the wheel’s surface is fully leveled, and it will then be ready for further use.