User's Manual ISO TNC 360 (260020xx, 280490xx) - heidenhain

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4 Programming 4.3 Tool Compensation Values 4-12 Traverse without radius compensation: G40 The tool center moves to the programmed coordinates. Applications: • Drilling and boring • Pre-positioning Traverse with radius compensation G41, G42 The tool center moves to the left (G41) or to the right (G42) of the programmed contour at a distance equal to the tool radius. "Right" or "left" is meant as seen in the direction of tool movement as if the workpiece were stationary. Y R R G41 Fig. 4.7: The tool moves to the left (G41) or to the right (G42) of the workpiece during milling X Y Y Fig. 4.6: These drilling positions are entered without radius compensation Between two program blocks with differing radius compensation you must program at least one block without radius compensation (that is, with G40). Radius compensation is not in effect until the end of the block in which it is first programmed. Shortening or lengthening single-axis movements G43, G44 This type of radius compensation is possible only for single-axis movements in the working plane: The programmed tool path is shortened (G44) or lengthened (G43) by the tool radius. Applications: • Single-axis machining • Occasionally for pre-positioning the tool, such as for cycle G47: SLOT MILLING. • G43 and G44 are activated by programming a positioning block with only one axis. • The machine tool builder may block the entry of single-axis positioning blocks through a machine parameter. Y R R X G42 X X TNC 360
4 Programming 4.3 Tool Compensation Values Machining corners TNC 360 Outside corners The TNC moves the tool in a transitional arc around outside corners. The tool "rolls around" the corner point. If necessary, the feed rate F is automatically reduced at outside corners to reduce machine strain, for example for very sharp changes in direction. G41 Fig. 4.8: The tool "rolls around" outside corners If you work without radius compensation, you can influence the machining of outside corners with the miscellaneous function M90 (see page 5-36). Inside corners The TNC calculates the intersection of the tool center paths at inside corners. From this point it then starts the next contour element. This prevents damage to the workpiece at inside corners. When two or more inside corners adjoin, the chosen tool radius must be small enough to fit in the programmed contour. G41 S S Fig. 4.9: Tool path for inside corners G41 4-13
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February 1994 HEIDENHAIN User's Man
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TNC Guideline: From workpiece drawi
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How to use this manual TNC 360 This
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Contents User's Manual TNC 360 ISO
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2 Manual Operation and Setup TNC 36
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4 Programming TNC 360 4.1 Editing P
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6 Subprograms and Program Section R
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8 Cycles TNC 360 8.1 General Overvi
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10 MOD Functions TNC 360 10.1 Selec
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1 Introduction 1.1 The TNC 360 1-2
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1 Introduction 1.1 The TNC 360 1-4
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1 Introduction 1.2 Fundamentals of
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7 Programming with Q Parameters 7.1
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8 Cycles 8.1 General Overview of Cy
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8 Cycles 8.2 Simple Fixed Cycles PE
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8 Cycles 8.2 Simple Fixed Cycles TA
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8 Cycles 8.2 Simple Fixed Cycles RI
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8 Cycles 8.2 Simple Fixed Cycles 8-
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8 Cycles 8.3 SL Cycles CONTOUR GEOM
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8 Cycles 8.3 SL Cycles 8-18 Example
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8 Cycles 8.3 SL Cycles 8-20 Cycle i
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8 Cycles 8.3 SL Cycles 8-22 Subprog
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8 Cycles 8.3 SL Cycles CONTOUR MILL
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8 Cycles 8.4 Cycles for Coordinate
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8 Cycles 8.5 Other Cycles DWELL TIM
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9 External Data Transfer 9-2 The TN
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9 External Data Transfer 9.3 Prepar
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10 MOD Functions 10.3 Entering the
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10 MOD Functions 10.7 Selecting the
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11 Tables, Overviews, Diagrams 11.1
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11 Tables, Overviews, Diagrams 11-2
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