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17 条记录 (耗时 0.011 秒)

    METHOD OF MEASURING A REFERENCE POSITION OF A TOOL RELATIVE TO A WORKPIECE, AND MACHINE TOOL FOR CARRYING OUT SAID METHOD
    6.
    发明公开
    METHOD OF MEASURING A REFERENCE POSITION OF A TOOL RELATIVE TO A WORKPIECE, AND MACHINE TOOL FOR CARRYING OUT SAID METHOD 失效
    程序是一个参考点的工具相对于作业来衡量和一台工具，执行该方法

    公开(公告)号：EP0737121A1

    公开(公告)日：1996-10-16

    申请号：EP95933584.0

    申请日：1995-10-23

    申请人： PHILIPS ELECTRONICS N.V.

    发明人： VAN TOOREN, Arie ,  VON GOOL, Gerrit Hendrik ,  VAN LEEST, Johannes Henricus Franciscus Maria ,  WIJN, Johan Cornelis

    IPC分类号： B23Q15 ,  B23Q17 ,  G05B19

    CPC分类号： B23Q17/2233 ,  G05B19/184 ,  G05B19/4015 ,  G05B2219/37425 ,  G05B2219/45157 ,  G05B2219/45178 ,  G05B2219/49271 ,  G05B2219/50021 ,  G05B2219/50036

    摘要： A method of measuring a reference position of a tool (13, 135) which is fastened to a first holder (11, 133) of a machine tool (1, 131) relative to a workpiece (35, 145) which is to be manufactured by means of said tool (13, 135) and which is fastened to a second holder (33, 143) of the machine tool (1, 131). According to the invention, the tool (13, 135) provides a distinguishing mark (123, 159) on the workpiece (35, 145) in a predetermined reference position of the first holder (11, 133) relative to the second holder (33, 143). Subsequently, the distinguishing mark (123, 159) is detected by a sensor (109, 153), and the reference position of the tool (13, 133) relative to the workpiece (35, 145) is determined from a position of the first holder (11, 133) relative to the second holder (33, 143) in which the distinguishing mark (123, 159) is detected by the sensor (109, 153). During implementation of the method, the tool (13, 135) and the sensor (109, 153) are fastened in fixed, permanent positions relative to one another and relative to the first holder (11, 133). It is achieved thereby that the accuracy with which the reference position of the tool (13, 135) relative to the workpiece (35, 145) can be measured depends exclusively on the accuracy with which the first holder (11, 133) can be positioned relative to the second holder (33, 143), so that the accuracy with which the workpiece (35, 145) can be machined with the tool (13, 135) is not adversely affected by the accuracy with which the reference position of the tool (13, 135) relative to the workpiece (35, 145) is measurable. In a special embodiment of the machine tool (1, 131) according to the invention, the sensor (109, 153) is an optical sensor with a focusing error detector (119). In a further embodiment of a machine tool (1) according to the invention, the second holder (33) with the workpiece (35) is rotatable about a Z-axis, the first holder (11) with the tool (13) is displaceable parallel to an X-axis which is perpendicular to the Z-axis, and the distinguishing mark is a circular groove (123) in a surface (121) of the workpiece (35) which extends perpendicularly to the Z-axis.

    ENGRAVING SYSTEM AND METHOD COMPRISING IMPROVED IMAGING
    10.
    发明公开
    ENGRAVING SYSTEM AND METHOD COMPRISING IMPROVED IMAGING 审中-公开
    雕刻和改进了成像过程

    公开(公告)号：EP1113930A1

    公开(公告)日：2001-07-11

    申请号：EP99924448.6

    申请日：1999-05-21

    申请人： MDC Max Dätwyler AG Bleienbach

    发明人： FLANNERY, David, L. ,  SEITZ, David, R. ,  STAUB, Thomas, P. ,  THOMAS, Matthew, A.

    IPC分类号： B41C1/045

    CPC分类号： B41C1/02 ,  B41C1/04 ,  B41C1/045 ,  B44B3/009 ,  B44B3/061 ,  G01B11/024 ,  G05B19/401 ,  G05B2219/33078 ,  G05B2219/37358 ,  G05B2219/37572 ,  G05B2219/37574 ,  G05B2219/45163 ,  G05B2219/45178 ,  G05B2219/45212 ,  G05B2219/49235 ,  G05B2219/50057 ,  H04N1/06 ,  H04N1/0671 ,  H04N1/19 ,  H04N1/4005

    摘要： An error detection apparatus and method for use with engravers, suc has gravure engravers. An error value E corresponding to the difference between a set of predetermined setup parameters and actual measurement of a portion of an engraved area on the cylinder is determined. The error value E is then used to adjust the engraver to engrave an actual cut or etch in accordance with the set of predetermined setup parameters. Advantageously, an error detection and correction system is suitable for providing a closed-loop system for engraving a cylinder. The apparatus and method may be used during initial setup or during normal operation of the engraver. Other features include an autofocus routine to facilitate the autofocus procedure. Also, image processing is further enhanced by gap filling, discontinuity removal, and light calibration methods which may be used alone, in combination with each other, or in combination with the automatic focus system and/or automatic shoe system. Other embodiments of the invention illustrate the use of a polarizing element to polarize reflected light, as well as light directed to a surface of the cylinder prior to reflection, and the use of a light emitting diode (LED) for illuminating the surface of the cylinder. The features of the improved optic system facilitate reducing or eliminating image noise, such as glare, 'blooming', inconsistent illumination, and enhances the quality of the image captured by a CCD array associated with the camera used in the imager or imaging system.