Conditioning means both the dressing and thesharpening of grinding wheels. In many cases, only a combination of bothmethods will provide satisfactory results in terms of grinding wheels.

The following details relate mainly to theconditioning of the bond variants resin B, metal M and metal-vitrified MV. Therequirements for dressing vitrified bonds are different from those described inthe chapter ?Vitrified Bonds".
Dressing
Dressing in this context means the recovery of the grinding rim geometry andthe correction of plane and radial run outs (eccentricity).
Conventional silicon carbide wheels are used for dressing B, M and MV bonds.The choice of the proper dressing wheel with respect to grit size and degree ofhardness depends on the grit size of the Diamond or CBN grinding wheel to bedressed. The overview below shows the appropriate details.
Selecting the right silicon carbide wheel

Dressing should always be madein the wet mode. If this cannot be done, select the grit size of the dressingwheel one increment finer than shown in the table. The same applies to thedressing of grinding wheels with small rim angle, e.g. pointed profile grindingwheels.

 The true running (orconcentricity) of the dressing wheel should be checked before every use. Therun out of a dressing wheel should never be more than 0.01 mm. Particularly forfine-grained dressing wheels (grit size 320 and finer), the true running shouldbe as perfect as possible to guarantee the best results for the Diamond or CBNgrinding wheel to be dressed.