37531922 - 10/2004 - heidenhain

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2.4 Setting the Datum with a 3-D Touch Probe Setting datum points using holes/cylindrical studs A second soft-key row provides soft keys for using holes or cylindrical studs to set datums. Define whether a hole or stud is to be probed The default setting is for probing holes. Select the probing functions with the TOUCH PROBE, shift the soft-key row. Select the probing function: For example, press the PROBING ROT soft key. Circular studs are to be probed. Define by soft key. Holes are to be probed. Define by soft key. Probing holes Pre-position the touch probe approximately in the center of the hole. After you have pressed the external START key, the TNC automatically probes four points on the wall of the hole. Move the touch probe to the next hole and have the TNC repeat the probing procedure until all the holes have been probed to set datums. Probing cylindrical studs Position the ball tip at a starting position near the first touch point of the stud. Select the probing direction by soft key and press the machine START button to start probing. Perform the above procedure four times. Overview Cycle Soft key Basic rotation using 2 holes: The TNC measures the angle between the line connecting the centers of two holes and a nominal position (angle reference axis). Datum using 4 holes: The TNC calculates the intersection of the line connecting the first two probed holes with the line connecting the last two probed holes. You need to probe diagonally opposite holes one after another (as shown on the soft key), as otherwise the datum calculated by the TNC will be incorrect. Circle center using 3 holes: The TNC calculates a circle that intersects the centers of all three holes, and finds the center. 36 2 Touch Probe Cycles in the Manual and Electronic Handwheel Modes
2.5 Measuring Workpieces with a 3-D Touch Probe Introduction You can also use the touch probe in the Manual and Electronic Handwheel operating modes to make simple measurements on the workpiece. Numerous programmable probing cycles are available for more complex measuring tasks (see “Automatic Workpiece Measurement” on page 93). With a 3-D touch probe you can determine: position coordinates, and from them, dimensions and angles on the workpiece. To find the coordinate of a position on an aligned workpiece: Select the probing function by pressing the PROBING POS soft key. Move the touch probe to a starting position near the touch point. Select the probe direction and axis of the coordinate. Use the corresponding soft keys for selection. To probe the workpiece, press the machine START button. The TNC shows the coordinates of the touch point as datum. Finding the coordinates of a corner in the working plane Find the coordinates of the corner point: see “Corner as datum— without using points that were already probed for a basic rotation,” page 33. The TNC displays the coordinates of the probed corner as datum. HEIDENHAIN iTNC 530 37 2.5 Measuring Workpieces with a 3-D Touch Probe
Page 1: User’s Manual Touch Probe Cycles
Page 4 and 5: Functions new since the predecessor
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Page 9 and 10: 1 Introduction ..... 13 1.1 General
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DR. JOHANNES HEIDENHAIN GmbH Dr.-Jo
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37531922 - 10/2004 - heidenhain

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