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

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5 Programming Tool Movements 5.5 Path Contours - Polar Coordinates TNC 360 Example for exercise: Tapping Given data Thread: Right-hand internal thread M64 x 1.5 Pitch P: 1.5 mm Start angle A : S End angle A : E Thread revolutions n : T Thread overrun 0° 360° = 0° at Z = 0 E 8 • at start of thread n : S • at end of thread n : E 0.5 0.5 Number of cuts: 1 Calculating the input values • Total height h: H = P . n P = 1.5 mm n = n + n + n = 9 T A E h = 13.5 mm • Incremental polar coordinate angle H: H = n . 360° n = 9 (see total height H) IPA = 360° . 9 = 3240° • Start angle A S with thread overrun n S: n S = 0.5 The start angle of the helix is advanced by 180° (n = 1 corresponds to 360°). With positive rotation this means that A with n = A – 180° = –180° S S S • Starting coordinate: Z = P . (n + n ) T S = –1.5 . 8.5 mm = –12.75 mm The thread is being cut in an upward direction towards Z E = 0; therefore Z S is negative. Part program A =0° E A =0° S A = –180° %S536I G71 *........................................... Begin program N10 G30 G17 X+0 Y+0 Z–20 * ................. Define the workpiece blank N20 G31 G90 X+100 Y+100 Z+0 * N30 G99 T11 L+0 R+5 *........................... Define the tool N40 T11 G17 S2500 *............................... Call the tool N50 G00 G40 G90 Z+100 M06 * .............. Retract the spindle and insert the tool N60 X+50 Y+30 * ..................................... Pre-position in the bore center in X, Y N70 G29 * ................................................. Capture position as a pole N80 Z–12 M03 * ....................................... Move the tool to starting depth N90 G11 G41 R+32 H–180 F100 * ........... Move with radius compensation and reduced feed to the first contour .................................................................. point N100 G13 G91 H+3240 Z+13.5 F200 * Helical interpolation; incremental angle and tool movement in the Z axis N110 G00 G40 G90 X+50 Y+30 * ............ Retract in X, Y(absolute values), cancel radius compensation N120 Z+100 M02 *................................... Retract in Z N9999 %S536I G71 * G13 A = 0° 5-35
5 Programming Tool Movements 5.6 M Functions for Contouring Behavior and Coordinate Data 5-36 The following miscellaneous functions enable you to change the standard contouring behavior of the TNC in certain situations, such as: • Smoothing corners • Inserting transition arcs at non-tangential transitions between straight lines • Machining small contour steps • Machining open contour corners • Entering machine-reference coordinates Smoothing corners: M90 Standard behavior - without M90 At angular transitions such as internal corners and contours without radius compensation, the TNC stops the axes briefly. Advantages: • Reduced wear on the machine • High definition of (outside) corners Note: In program blocks with radius compensation (G41/G42), the TNC automatically inserts a transition arc at external corners. Smoothing corners with M90 The tool moves around corners at constant speed. Advantages: • Provides a smoother, more continuous surface • Reduces machining time Application example: Surfaces consisting of several straight line elements. Duration of effect The miscellaneous function M90 is effective only in the blocks in which it is programmed. Operation with servo lag must be active. A limit value can be set in machine parameter MP7460 (see page 11- 9) below which the tool will move at constant feed rate (valid for operation both with servo lag and with feed precontrol). This value is valid regardless of M90. G40 Fig. 5.40: Standard contouring behavior with G40 and without M90 G40 Fig. 5.41: Contouring behavior with G40 and M90. TNC 360
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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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1 Introduction 1.3 Switch-On 1-14 S
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1 Introduction 1.4 Graphics and Sta
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1 Introduction 1.4 Graphics and Sta
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1 Introduction 1.5 Programs Selecti
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2 Manual Operation and Setup 2.1 Mo
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2 Manual Operation and Setup 2.1 Mo
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2 Manual Operation and Setup 2.2 Sp
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2 Manual Operation and Setup 2.3 Se
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2 Manual Operation and Setup 2.4 3D
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2 Manual Operation and Setup 2.4 3D
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2 Manual Operation and Setup 2.6 Me
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2 Manual Operation and Setup 2.6 Me
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3 Test Run and Program Run 3.2 Prog
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3 Test Run and Program Run 3.2 Prog
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3 Test Run and Program Run 3.3 Bloc
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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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User's Manual ISO TNC 360 (260020xx, 280490xx) - heidenhain

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