G CODES AND M CODES
G - CODES AND M - CODES
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G12 CIRCULAR POCKET MILLING
CNC PROGRAMMING G12 Circular Pocket Milling CW / G13 Circular Pocket Milling CCW (Group 00) These G-codes mill circular shapes. They are different only in that G12 uses a clockwise direction and G13 uses a counterclockwise direction. Both G-codes use the default XY circular plane ( G17 ) and imply the use of G42 (cutter compensation) for G12 and G41 for G13 . G12 and G13 are non-modal. * D - Tool radius or diameter selection** F - Feedrate I - Radius of first circle (or finish if no K ). I value must be greater than Tool Radius, but less than K value. * K - Radius of finished circle (if specified) * L - Loop count for repeating deeper cuts * Q - Radius increment, or stepover (must be used with K) Z - Depth of cut or increment *indicates optional **To get the programmed c...
G70 BOLT HOLE CYCLE HASS
CNC PROGRAMMING G70 Bolt Hole Circle : I - Radius * J - Starting angle (0 to 360.0 degrees CCW from horizontal; or 3 o clock position) L - Number of holes evenly spaced around the circle *indicates optional This non-modal G code must be used with one of the canned cycles G73 , G74 , G76 , G77 , or G81 - G89 . A canned cycle must be active so that at each position, a drill or tap function is performed. See also G-code Canned Cycles section. % O60701 (G70 BOLT HOLE CIRCLE) ; (G54 X0 Y0 is center of the circle ) ; (Z0 is on the top of the part) ; (T1 is a drill) ; (BEGIN PREPARATION BLOCKS) ; T1 M06 (Select tool 1) ; G00 G90 G40 G49 G54 (Safe startup) ; G00 G54 X0 Y0 (Rapid to 1st position) ; S1000 M03 (Spindle on CW) ; G43 H01 Z0.1 (Activate tool offset 1) ; M08 (Coolant on) ; (BEGIN CUTTING BLOCKS) ; G81 G98 Z-1. R0.1 F15. L0 (Begin G81) ; (L0 skip drilling X0 Y0 position) ; G70 I5. J15. L12 (Begin G70...
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