Question

G00 Rapid move G0 X# Y# Z# up to eight axes or GO Z# X# Gol Feed Rate move G 1 X# Y# Z# up to eight axes or G1 Z# X# G02 Clockwise move X# Y#1# J# G03 Counter Clockwise move X# Y#1# G04 Dwell time G04 L# G08 Spline Smoothing On G09 Exact stop check, Spline Smoothing Off G10 A linear feedrate controlled move with a decelerated stop G11 Controlled Decel stop G17 XY PLANE G18 XZ PLANE G19 YZ PLANE G21 Defaults to Metric unit G28 Return to clearance plane G33 Threading (Lathe) G35 Bypass error checking on next line G40 Tool compensation off G41 Tool compensation to the left G42 Tool compensation to the right G43 Tool length compensation-negative direction G44 Tool length compensation-positive direction G49 Tool length compensation cancellecd G53 Cancel work coordinate offsets G54-G59 Work coordinate offsets 1 through 6 G61 Spline contouring with buffering mode off G64 Spline contouring with buffering mode on G65 Mill out rectangular pocket G66 Mill out circular pocket G67 Flycut G68 Mill out rectangular pocket with radius corners G70 Inch mode G71 Millimeter mode G74 Peck drilling (Lathe) G83 Z# X# R# G81 Drill cycle G81 X# Y# Z# R# G82 Dwell cycle G82 X# Y# Z# R# P# F# G83 Peck cycle G83 X# Y# Z# R# Q# F# G84 Tapping cycle G84 X# Y# Z# R# C# G85 Boring cycle 1 G85 X# Y# Z# R# G86 Boring cycle 2 G86 X# Y# Z# R# G88 Boring cycle 3 G88 X# Y# Z# R# G89 Boring cycle 4 G89 X# Y# Z# R# G90 Absolute mode G91 Incremental mode G92 Home coordinate reset G92 X# Y# Z# G94 Sets cutting mode to units per minute G110 Lathe Groove Face G111 Lathe Groove OD G112 Lathe Groove ID G113 Lathe Thread OD G114 Lathe Thread ID G115 Lathe Face Rough G116 Lathe Turn Rough G120 Mill Outside Square G121 Mill Outside Circle or Island G122 Mill Out Counter Bore G123 Mill Outside Ellipse pocket G124 Mill Inside Ellipse pocket G125 Mill Outside Slot G126 Mill Inside Slot pocket G130 3D tool compensation with gouge protection G131 3D offset parallel to 3D profile G132 3D tool compensation with gouge protection in the Z axis only G135 5 axis tool compensation with gouge protection G 136 Included angle limit for gouge protection. G136 L# G140 3D part rotation and plane titing G140 U# V# W# R# G141 Scale factor for the X axis only. G141 L# G142 Scale factor for the Y axis only. G142 L# G143 Scale factor for the Z axis only. G143 L# G160 Mill 3D Cylinder G162 Mill 3D Sphere G163 Mill 3D Ramped Plane G170 Set soft limits and crash fixture/chuck barriers to defaults G171 Set backward crash fixture/chuck barriers G171 U# V# W# G172 Set forward crash fixture/chuck barriers G172 U# V# W# G181 Bolt Hole Drill G182 Bolt Hole Dwell G183 Bolt Hole Peck G184 Bolt Hole Tap G185 Bolt Hole Bore M01 Program Stop M02 End of Program M03 Spindle On Clockwise, Laser, Flame, Power ON M04 Spindle On Counter Clockwise M05 Spindle Stop, Laser, Flame, Power OFF MO6 Tool Change M08 Coolant On M09 Coolant Off M10 Reserved for tool height offset M13 Spindle On, Coolant On M30 End of Program when macros are used M91 Readout Display Incremental M92 Readout Display Absolute M97 Go to or jump to line number M98 Jump to macro or subroutine M99 Return from macro or subroutine M100 Machine Zero Reset M199 Mid program start Q4. Compare between these tools used in CNC milling machines: (i) (ii) (a) Tapping tools and thread cutting tool. (5 marks) Lollipop milling tool and ball nose end mill. 5 marks) Figure Q4b shows a component to be machined on a CNC mill. You are needed to construct a complete CNC program. Material is Aluminum with thickness of 25 mm. Work coordinate offset used is G58, set as labelled. In your program, you will need 2 end mills and a tool change block. In the tools carousel, TI is a diameter 8 mm HSS drill and T2 is a diameter 35 mm center cutting end mill. Do not use tool length compensation (both tools had been set to referenced of G58) and also tool radius compensation, G40 15 marks) (b) Origin location OriginoD0 35 30 35 15 70 Figure Q4b

Answer 1

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Contouring & Profiling Slotting Deburring & Edgebreaking Undercutting

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