Wuhan Huazhong Numerical Control Co., Ltd HNC-18iT, Programming Manual

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Table of Contents
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Contents
Preface............................................................................................................................................. i
1
General................................................................................................................................... 1
1.1
CNC Programming..................................................................................................... 2
1.2 Interpolation................................................................................................................4
1.2.1 Linear Interpolation........................................................................................ 4
1.2.2 Circular Interpolation......................................................................................5
1.2.3 Thread Cutting................................................................................................ 5
1.3 Feed Function............................................................................................................. 6
1.4 Coordinate System......................................................................................................7
1.4.1 Reference Point...............................................................................................7
1.4.2 Machine Coordinate System........................................................................... 8
1.4.3 Workpiece Coordinate System........................................................................9
1.4.4 Setting Two Coordinate Systems at the Same Position................................ 10
1.4.5 Absolute Commands.....................................................................................11
1.4.6 Incremental Commands................................................................................ 12
1.4.7 Diameter/Radius Programming.................................................................... 13
1.5 Spindle Speed Function............................................................................................ 14
1.6 Tool Function............................................................................................................15
1.6.1 Tool Selection............................................................................................... 15
1.6.2 Tool Offset.................................................................................................... 15
1.7 Miscellaneous Function............................................................................................ 18
1.8 Program Configuration............................................................................................. 19
1.8.1 Structure of an NC Program......................................................................... 19
1.8.2 Main Program and Subprogram....................................................................20
2 Preparatory Function (G code)............................................................................................. 21
2.1
G code List................................................................................................................22
3 Interpolation Functions.........................................................................................................24
3.1
Positioning (G00)..................................................................................................... 25
3.2 Linear Interpolation (G01)........................................................................................26
3.3 Circulation Interpolation (G02, G03)....................................................................... 31
3.4 Chamfering and Rounding (G01, G02, G03)............................................................37
3.4.1 Chamfering (G01).........................................................................................37
3.4.2 Rounding (G01)............................................................................................ 38
3.4.3 Chamfering (G02, G03)................................................................................ 40
3.4.4 Rounding (G02, G03)................................................................................... 41
3.5 Thread Cutting with Constant Lead (G32)............................................................... 43
3.6 Tapping (G34)...........................................................................................................46
4 Feed Function....................................................................................................................... 49
4.1
Rapid Traverse (G00)............................................................................................... 50
4.2 Cutting Feed (G94, G95).......................................................................................... 51
4.3 Dwell (G04).............................................................................................................. 52
5 Coordinate System................................................................................................................53
5.1
Reference Position Return (G28)..............................................................................54
5.2 Auto Return from Reference Position (G29)............................................................ 55
5.3 Setting a Workpiece Coordinate System (G92)........................................................ 57
5.4 Selecting a Machine Cooridinate System (G53).......................................................58
5.5 Selecting a Workpiece Coordinate System (G54~G59)............................................59
5.6 Origin of a Workpiece Coordinate System (G51, G50)............................................ 61
5.7 Absolute and Incremental Programming (G90, G91)...............................................62