| 摘要 |
PURPOSE:To maintain the accuracy of finishing for a long period of time in a stable manner, by calculating a dresses abrastion quantity of a dresser on the basis of dressing resistance at the time of dressing a grinding wheel, and installing a controlling device which compensates a grinding condition of the wheel with a work according to this dress abrasion quantity. CONSTITUTION:The actual dressing resistance Di detected by a dressing resistance detector 16 is collated and compared with a characteristic table stored in a storage part of a desired skip time operational circuit 22 whereby a constant K corresponding to the actual dressing resistance Di is searched. The value made up of subtracting this searched constant K from the initial skip frequency Ni set by an initial skip frequency setting circuit 21 is set down to Ni-K with which desired skip frequency No is calculated, but since the characteristic being stored in the storage part is one that the more a value of the constant K increases, the more the dressing resistance Di grows large, in proportion as the dressing resistance Di increases, the skip frequency No is decreased and compensated,so that the grinding wheel 5 is dressed by the dresser 12 at a short dressing interval, and sharpness in the wheel 5 is properly maintained for a long period of time.
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