Haas G71 Example Program

Haas cnc lathe uses one-line syntax of G71 roughing canned cycle.

This cnc program example shows the use of G71 turning cycle for ID roughing (Inside roughing).

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In the below cnc programming example

1 – A boring bar is used for the whole the roughing operation with G71 Rough Turning Cycle.

2 – Same boring bar is used for finish cut with G70 Finishing Cycle.

Example of using a Haas G71 for I.D. Roughing and Finishing.

Haas CNC Program Example

Haas G71 Example Program

Haas G71 Example Program

O1136
N1 T101
N2 G97 S2000 M03
N3 G54 G00 X0.7 Z0.1 M08
N4 G71 P5 Q12 U-0.01 W0.005 D0.08 F0.01
N5 G00 X4.5
N6 G01 X3. R.25 F.005
N7 Z-1.75 R.5
N8 X1.5 R.125
N9 Z-2.25 R.125
N10 X.75 R.125
N11 Z-3.
N12 X0.73
N13 G70 P5 Q12
N14 M09
N15 G53 X0
G53 Z0
M30

Haas CNC Program Explanation

N1 – Tool 1 Offset 1
N3 – Rapid to start position
N4 – U is a minus for G71 I.D. Roughing
N5 – N5 is start of part path geometry defined by P6 in G71 line
N12 – N12 is end of part path geometry defined by Q12 in G71 line
N13 – G70 Defines a finish pass for lines P5 through Q12
N15 – To send machine home for a tool change