8/17/2019 FAQG71G70 RoughandFinishwithSameTool

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Frequently Asked Questions 

The Hardinge Group 

G70/G71 Rough and Finish Turning Cycle Program

Example FANUC Series Controls 

The following program is an example of the G71 rough turning cycle. This cycleThe following program is an example of the G71 rough turning cycle. This cycle

will work only on a part that has a steadily increasing or decreasing diameter(s). If

the part has a pocket areas please refer to the G71 Pocket Rough Turning Cycle

Program Example.

same tool to finish the profile. Consider the following drawing: 

8/17/2019 FAQG71G70 RoughandFinishwithSameTool

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Frequently Asked Questions 

The Hardinge Group 

O1111 (G71 ROUGH TURNING CYCLE) 

N1(T0101-ROUGH FACE AND TURN R.0312T3) 

M98P1 (SAFE INDEX POSITION) M98P1 (SAFE INDEX POSITION) 

M14S1000G97 (START SPINDLE WITH COOLANT ON) 

T0101 (INDEX TURRET) 

X6.1Z.005 (MOVE TO PART) 

G50S4000 (MAXIMUM SPINDLE SPEED) 

G96S600 (SURFACE FEET PER MINUTE) 

G1G99X-.064F.01 (ROUGH FACE IPR THREAD) 

G0Z.1

 

(CLEAR PART IN Z AXIS) 

X6.1  (CLEAR PART IN X AXIS) 

G1G99

 

(SET IPR FEED) 

G71U.1R.02

 

(SEE BELOW) 

G71P100Q200U.015W.005F.015 (SEE BELOW) 

N100G0X.7 (START POINT OF FINISH TOOL) 

G1G99X1.Z-.05F.005 (CUT CHAMFER IRP FEED FOR FINISH TOOL) 

Z-4.  (Z AXIS ENDPOINT) 

X5.9  (X AXIS END POINT) 

N200X6.1Z-4.1

 

(END POINT OF FINISH TOOL) G70P100Q200

 

(G CALL FOR FINISH CYCLE) 

M98P1

 

(SAFE INDEX POSITION) 

M1 (OPTION STOP) 

Where G71 U.1 R.02 

U=radial depth of cut 

R=retract amount for both axis between passes 

Where G71 P100 Q200 U.015 W.005 F.015 

Where G71 P100 Q200 U.015 W.005 F.015 

P=1ST line number of profile 

Q=last line number of profile U=amount of stock to leave on the X axis for finishing 

W=amount of stock to leave on the Z axis for finishing 

F=feedrate for rough cutting 

8/17/2019 FAQG71G70 RoughandFinishwithSameTool

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Frequently Asked Questions 

The Hardinge Group 

Where G70 P100 Q200 

P=1st

 line number of profile 

Q=last line number of profile 

Please note that the X axis starting point prior to the cycle and the X axisPlease note that the X axis starting point prior to the cycle and the X axis

ending point of the cycle are the same. This is highly recommended to

minimize any undesirable motion during the cycle. 

Additional notes pertaining to this cycle: 

1. Any S and or F commands programmed between the P and Q line numbers are 

ignored by the control and will become active only for the finishing cycle G70. 

2. Tool nose radius compensation may be used with this cycle; however it is not

active within the G71 cycle.