diamond wheel recess repair method

Diamond grinding wheel after prolonged use , there will be recess , then how do we fix it ? Described briefly below :
1 Reduce the wheel speed , in principle at least half square easy renovation , if no conversion can be repeated  cutting discs in order to reduce the speed switch machine refurbishment !
(2) to the grinding wheel truing tool , before moving overlapping width of grinding wheel surface is 1/ 3 to 1 /2.
3 successive feed to 140 # , for example, advanced 0.005 , crisp sound to sound blunt , flat surface jump surface , and then proceed to 0.01 and repeat sound, surface inspection , and then proceeds to 0.015,0.02,0.025,0.03 sequentially until crisp sound, surface flat , no flutter pattern , which means rounding , dressing complete. Maximum amount of feed  hole saw blades renovations need be adjusted depending on wheel size , the more coarse granularity of the greater amount of feed renovation !
Note: You can pre- order singular pen painted oil diamond wheel circumference , when the ink traces completely disappeared , that means rounding the job done.
Grinding debris when soiled condition , which can be hand-held strip of sand dressing , cutting the wheel to restore function ! 3 uses centrifugal brake brakes after rounding is necessary then to the white sands of dressing . 4 Diamond and CBN grinding wheel once on the concrete diamond blades  machine, unless the wear is completed , it is best not to remove it. If it must be removed , the need to remove the flanges together , otherwise, once re- use, that is the amount required to burn off more renovations !