Example 2: TNC with a G71 Roughing Canned Cycle

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This example uses TNC with a G71 roughing canned cycle.

TNC G71 Roughing Canned Cycle


  • Setting 33 is FANUC.

  • Tools:

    T1 Insert with 0.032 radius, roughing

Tool Offset Radius Tip
T1 01 .032 3
% o30711 (TNC WITH A G71 ROUGHING CYCLE) ; (G54 X0 is at the center of rotation) ; (Z0 is on the face of the part) ; (T1 is an OD cutting tool) ; (BEGIN PREPARATION BLOCKS) ; T101 (Select tool and offset 1) ; G00 G18 G20 G40 G80 G99 (Safe startup) ; G50 S1000 (Limit spindle to 1000 RPM) ; G97 S500 M03 (CSS off, Spindle on CW) ; G00 G54 X3.0 Z0.1 (Rapid to 1st position) ; M08 (Coolant on) ; (BEGIN CUTTING BLOCKS) ; G96 S200 (CSS on) ; G71 P1 Q2 U.01 W.005 D.08 F.012 (Begin G71) ; N1 G42 G00 X0.6 (P1 - TNC on) ; G01 Z0 F0.01 (Begin toolpath) ; X0.8 Z-0.1 F0.005 (45 deg. Chamfer) ;Z-0.5 (Linear feed) ; G02 X1.0 Z-0.6 I0.1 (Feed CW) ; G01 Z-0.9 (Linear feed) ; X1.4 (Linear feed) ; X2.0 Z-1.6 (23 deg. Taper) ; G01 X3. (End of toolpath) ; N2 G00 G40 X4. (Q2 - TNC off) ; (BEGIN COMPLETION BLOCKS) ; G97 S500 (CSS off) ; G53 X0 M09 (X home, coolant off) ; G53 Z0 M05 (Z home, spindle off) ; M30 (End program) ; %
note: This part is a G71 Type I path. When using TNC it is very unusual to have a Type II path, as the compensation methods can only compensate the tool tip in one direction.

Be aware: Many service and repair procedures should be done only by authorized personnel. The service technicians at your Haas Factory Outlet (HFO) have the training, experience, and are certified to do these tasks safely and correctly. You should not do machine repair or service procedures unless you are qualified and knowledgeable about the processes.

Danger: Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not completely understand. Contact your Haas Factory Outlet (HFO) and schedule a service technician visit if you have any doubts about doing a procedure.