G71 FANUC CNC-TURNING USING A G71-G70 CANNED CYCLE for rough turning and finish turning
-The command structure consists of 2 lines: (include 2 lines)
G71 U ... R ...
G71 P ... Q ... U ... W ... F ... S ..
When G71 turning cycle is run the whole operation will be done in following sequence,
First-cut
1 - Tool will move in x-axis U (depth of cut) deep with programmed feed from starting-point.
2 - Tool will travel with feed in z-axis (destination point in z-axis is given in P Q blocks )
3 - Tool rapidly retracts R amount in both x-axis and z-axis (at 45 degrees).
4 - Tool rapidly travel in z-axis to start-point
Later-cuts
5 - Tool rapidly moves to last cut depth.
6 - Tool moves with feed in x-axis U deep (first-block U depth of cut).
7 - Tool with feed moves in z-axis (destination point given in P Q blocks).
8 - Tool rapidly retracts in x-axis and z-axis R amount (45 degrees).
9 - Tool rapidly moves to start-point only in z-axis.
This whole sequence of operation keep on going, until the destination point in x-axis is met.
If finishing allowance is given tool will not make the exact diameter and length given in P Q blocks but will leave that much allowance, This finishing allowance can be later machined by calling G70 finishing cycle.
Reference more tutorial:
1. G71 FANUC CNC-TURNING USING A G71-G70 CANNED CYCLE-Rough and Finishing turning G71-70
• G71 FANUC CNC-TURNING ...
2. G72 CNC Fanuc Canned Cycle Facing (G72- CNC radial rough turning)
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3. G73 Pattern Repeating Cycle - Think simple with G73 rough lathe cnc casting
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30 мар 2019
