| 摘要 |
The invention relates to a spectacle lens edge grinding machine having at least one rough-grinding wheel and having a plurality of facet-grinding wheels which are arranged at an axial distance from a grinding-wheel shaft. Provided approximately parallel thereto is a lens-holding shaft for receiving a spectacle lens to be ground. In addition, a device for adjusting the distance between the shafts, and an adjusting device with which the position of the two shafts relative to one another in their axial direction can be adjusted, are provided. Furthermore, a transducer which, with its sensor in the measuring position, records the position of the lens edge of a spectacle lens, which is held in the lens-holding shaft and is to be ground, after the rough-grinding relative to a first facet-grinding wheel is provided, through the signal of which transducer the axial displacement of the lens-holding shaft or grinding-wheel shaft is switched off when the spectacle lens to be ground has reached the desired position in front of said facet-grinding wheel. When another of the facet-grinding wheels contained in the spectacle lens edge-grinding machine is to be used for the spectacle lens, the position, found by means of the transducer, of the spectacle lens to be ground relative to the first facet-grinding wheel forms the starting position for a subsequent positioning of the spectacle lens to be ground with respect to the further facet-grinding wheel. The subsequent positioning may be carried out path-dependently or time-dependently.
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