G72 facing cycle

G72 kya hai aur kaise use kare

G72 Ko kehte hai facing cycle
Iska use hum koi bhi job Ko face karna hai aur usme material jyada hai matlb 10 mm 20 mm to usko ap ab single line program Bana ke to nhi cut karenge ise ek to ap ka time waste hoga aur CNC program bhi bahut bada ho ga
Agar G72 ka use ap karenge to apko Khali 2 line ka program banana hai aur bus apka  Kam ho jayega

Format

G72 W_ R_
G72 P_ Q_ W_ F_

Example se dekhiye

Agar humare par job hai dia hai 300mm
Ab face karna hai 10 mm to program aise banayenge

G54
S1000 M3
GO X302 Z100.   ( Starting position of X)
Z50
Z11.                       (Starting of cycle z)
G72 W2 R0.5
G72 P15 Q16 W.5 F0.3
N15 G0 Z0
N16 G01 X-2
G0 Z2
Z100
G28 U0 W0
M5
M30

1st line- W2 means ki har pas Mai 2 mm cut hoga
R - means har cut hone ke bad 0.5 piche ayega phir start position Mai ayega isko retract bhi kehte hai

2nd line - P starting block
      Q ending block
W- balance for finish pass
F - feed

G71 in hindi

What is G71 and how to use

Aaj apko G71 clear ke bare Mai batata hu alhir kaise hum G71 ka use karte hai aur kaha kaha karte hai , 

To G71 Ko use karte hai outer dia Ko ya phir boring Ko rough karne ke liye is Ko use kar ke ek to apko bar bar single line ka program nhi banana padega bus aap seedha do line ka program Bana ke jaldi se Kam Ko shuru kar sakte hai 

To aiye samjhte hai G71 cycle prog format Aisa hai 

G71 U_ R

G71 P_ Q_ U_ W_ F

pehla wala U hai usko depth of cut kehte hai agar humne Dala U2 iska matlb har pas Mai 4 mm cut hoga agar U3 Dala to matlb har pas Mai 6 mm cut hoga 

F Ko kehte hai feed 

R Ko kehte hai retract after every pass

R ka use hota hai jab bhi humara cutting pas complete ho ga to ye X +  hoke bahar ayega 

Agar Apne R 0.5 diya aur apka pass jo cut horaha hai X 30 pe to ye retract hoga X 31 pe ayega phir starting point pe ayega 

Next U &  W hota hai finishing ke liye kitna balance rakhna hai roughing cycle complete hone ke bad final pass ke liye kitna rakhna hai suppose Apne U2 aur W 0.2 rakha to G71 cycle finish hone ke bad apko final ke liye balance bachega dai Mai 2 mm and z Mai .2

Ab apko ek example de ke batata hu suppose apka material hai 200 mm diameter Mai and total length hai 100 mm

Final dia banana hai apko 150 mm and apko z Mai Khali 80 mm cut karna hai 

Ab program hoga uska

G54                      (work offset)

T0101

G97 S500 M3

G0 X201 Z100

Z2

G71 U3 R0.5

G71 P10 Q 20 U2 F0.35

N10 G0 X159

G01 Z0

N20 Z-80

G0 X201

Z50 

M5

M30

Abhi ap soch re honge p q ke bare Mai to bataya nhi  to actually p q ka Khali Kam hai niche diye Gye block Ko read Katana bus Dhyan ye rakhna hai p aur q Mai jo bhi ap number doge wo hi niche N Mai dena dena hai P Ko kehte hai starting block

       Q Ko kehte hai ending block

Whi program ap aise bhi likh sakte hai 

G54                      (work offset)

T0101

G97 S500 M3

G0 X201 Z100

Z2

G71 U3 R0.5

G71 P35 Q55 U2 F0.35

N35 G0 X159

G01 Z0

Z-80

N55 G0 U2.        ( U2 IS INCREMENTAL )

Z2

Z50 

M5

M30

2 nd example

2 nd drawing Mai dekhiye isko kaise G71 Mai banayegne

G54

G97 S1000 M3

G0 X260 Z100

Z50

Z2

G71 U2.5 R0.5

G71 P95 Q96 U2 W0.3 F0.3

N95 G0 X46

G01 Z0

X52 Z-3

Z-97

G02 X58 Z-100 R3

G01 X189

X195 Z-103

Z-250

X251

N96 G0 U2

Z2

Z100

M5

M30