Fanuc G71 G72 Roughing Cycle and G70 Finishing Cycle

1. Longitudinal Rough Turning Cycle (G71)

Longitudinal rough turning cycle adalah :
Proses pengerjaan kasar (roughing) kontur ke arah memanjang (Z axis)
Dalam hal ini dimungkinkan memasukan parameter sesuai dengan kebutuhan,
diantaranya berhubungan dengan depth of cut (DOC), allowance terhadap
sumbu X dan sumbu Z (allowance diameter & panjang) sekaligus
mengeset Rpm (S), feeding (F) serta tool yang program utama / kepala program dan anak
yang akan diaplikasikan untuk pengerjaan kontur akan digunakan (T). Termasuk penerapan
program (main program dan sub program) benda.

Format Penulisan :

G1 Z2.  X40.                                    : Pendekatan pahat dan sebagai awal penyayatan pada                                                                                  koordinat Z2. dan X40 (dapat disesuaikan dengan ukuran BK)

 

G71 U0.25 R1 F0.3                        : G71mulai siklus pembubutan diameter

                                      : U0.25 ; depth of cut arah X =0.25,

                                      : R1= pembebas 1,

 

G71 P201Q202 U0.3 W0 K0 J0       : G71 mulai siklus pembubutan diameter ,

                                        : P201 = Penanda mulai kontur dieksekusi,

                                        : Q201 = Penanda Kontur p=berakhir,

                                        : U0.3 =Allowance Sb X =0,3

                                        : W0.3 =  Allowance Sb Z =0.3,

                                        : F0.3 = Feeding 0.3

N201 G1 Z0.

X32.

G3 …….

G1 …..

G1 ……

N202 X52.

 

2.Face Rough Turning Cycle (G72)

Face rough turning cycle adalah : 

Proses pengerjaan kasar (roughing) kontur ke arah melintang (X axis)
Dalam hal ini dimungkinkan memasukan parameter penyayatan sesuai dengan kebutuhan
Format Penulisan  :

G1 Z2.  X40.                                  : Pendekatan pahat dan sebagai awal penyayatan pada                                                                         koordinat Z2. dan X40 (dapat disesuaikan dengan ukuran BK)

 

  G72 W0.3 R0.3                               : G72 mulai siklus pembubutan facing

                                                          :W0.3 ; depth of cut arah Z =0.3

                                                          : R0.3 = pembebas 0.3

  G72 P101Q102 W0.1 F0.25           : G72 mulai siklus pembubutan facing

                                                          : P101 = Penanda mulai kontur dieksekusi,

                                                          : Q102 = Penanda Kontur p=berakhir,

                                                          : W0.1 ; Allowance Sb Z =0.1,

                                                          : F0.25 = Feeding 0.25

N101 G01 Z0.

X-0.8

Z2.

N102

 

3. Finishing Cycle (G70)

Finishing cycle adalah :
Proses pengerjaan akhir (finishing) kontur benda
Dalam hal ini proses langsung menuju kontur yang dimaksud, sekaligus dapat
memasukan parameter penyayatan (cutting parameters)

 

Format Penulisan
 

G70 P201Q202 F0.05          : G70 mulai siklus finising ,

                                             : P201 = Penanda mulai kontur dieksekusi,

                                             : Q201 = Penanda Kontur p=berakhir,

                                             : F0.05 = Feeding 0.05

 

 

Contoh Program 1 

Video Simulator mengacu program dibawah ini

 

 

O7701 (ANGLE); G28 U0. W0. ; G99 ; M5 ; M9 ; T0101 ; G54 ; G97 S540 M4 ; M8 ; G0 Z10. ; G0 X80.; G1 X72. Z4. F0.3 ; G72 W0.3 R1. F0.3 G72 P100 Q150 W0. ; N100 G1 Z0. ;

G1 X-1. ; N150 G1 Z4. ; G1 X72. Z4. F1. ;

G71 U0.3 R1. F0.3 ; G71 P200 Q250 U0.2 W0. ; N200 G1 X28. ;

G1 Z0. ; G1 X40. Z-24.096 ; G1 Z-60. ; G1 X50. ; G1 Z-65. ; N250 G1 X72. ; G70 P200 Q250 F0.1 ;

M5 ; M9 ; G28 U0. W0. ; M30

Contoh Program 2

 

Mengacu Program dibawah ini

O7702 (90);
G28 U0. W0.;
G99;
M5;
M9;
T0101;
G54;
G97 S350 M4;
M8;
G0 Z10. ;
G0 X120. ;
G1 X112. Z5. F0.6 ;
G71 U0.5 R1. F0.3 ;
G71 P120 Q150 U0.2 W0.2 ;
N120 G1 X32.;
G1 Z0.;
G3 X40. Z-4. I0. K-4.;
G1 Z-13.;
G2 X54. Z-20. I7. K0. ;
G1 X88.;
G3 X100. Z-26. I0. K-6.;
G1 Z-40.;
N150 G1 X112.;
G70 P120 Q150 F0.1 ;
M5;
M9;
G28 U0. W0.;
M30 ;
 

Video : Tutorial CNC Lathe sinumerik 802se manual programing

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Any Types of mechanic thread screw, and chart

Understanding thread is wrapped around the grooves on a steel rod / shaft with a certain size.

The use of so many screw encountered in everyday life, because it serves as a threaded fastener, but it also serves as a screw driver an object. before we know the various types of screw helps us recognize the first part-part threaded.

Here are the different types of screw according to shape

1 Triangle Thread / V Thread

Screw type is a lot we meet, and many of the standard screw which this triangle is there

a. The metric screw / Metric Standard Threads

A triangle with screw tops 60 ° angle and overall dimensions in metric units.

The symbol of this thread is "M" for example is M8 x 1.25 metric thread with a diameter of 8 mm and a pitch of 1.25 mm

 

b. Whitworth screw / Whitworth Standard Threads

A triangle with screw tops 55 ° angle and the overall dimensions of the unit british

(inches). The symbol of this thread is "W", for example W ⅜ "x 20 TPI Whitworth screw with a diameter of ⅜" and there are 20 Threads per Inch (peak number of threads per inch spacing 1)

 

c. Threaded pipe / BSP thread (British Standard Pipe Thread)

A standard screw used on pipe joints. symbolized by the letter "R" for example R ⅜" standard threaded pipe to the pipe diameter ⅜"

 

d. UNF threaded / Unified Fine Thread

is a kind of screw with combined dimensions of metric and british. This screw has a threaded 60 ° angle peaks and the size dimensions in british units (inches). threaded is mostly used in the United States and Canada. The symbol used is "UNF" UNF example ⅜ "x 24 TPI UNF threaded  with a diameter of  ⅜" and the number of threads per inch 24.

e. UNC threaded / Unified Coarse Thread

a rough version of the screw UNC. rough here meant is the number of threads per inch less than UNF threaded so that it looks rough. The symbol used is "UNC" for example ⅜ - 16 UNC is UNC threaded diameter ⅜ "and the number of threads per inch 16

 

2. Screw Rectangular / Square Threads

is threaded to form a rectangular profile, normally used for heavy loads such as opening the floodgates on the dam and screw on vise. Square Thread symbolized by the letter "Sq" and  example Sq⅜"x 8 TPI is square thread diameter of  ⅜" and the number of threads per inch is 8.

 

3. Trapezoidal Screw / Trapezium Thread

is threaded with a trapezoidal profile with a peak angle of 30 °. commonly used on the screw drive carriage and leadscrew on a lathe. . This thread is symbolized by the letter "Tr" with metric dimensions 18 x 4 Tr example is the trapezoidal screw with a diameter of 18 mm and a distance of 4 mm screw tops.

 

4 Screw Acme / Acme Thread

is threaded with a trapezoidal profile with a peak angle of 29 °, commonly used in the carriage and leadscrew. This thread is symbolized by "Acme" with dimensions in inches.

 

5. Screw Round / Round Thread

Is threaded with a semi-circular profile in the valleys and peaks thread. commonly used for transmitting power / motion is smooth with no looseness. Another type of round thread is threaded edison screw is used in light bulbs

6 Screw Ball / Ball Screw

Is usually paired with a screw mechanism and steel balls used to drive CNC machines because almost no leeway with precise distances.

 

7 Screw horn. / Buttress Threads

Is a triangular shaped screw but not an isosceles triangle, but shaped like a horn. commonly used as a locking collet lock and pull like the toothpaste cap.

 

8 Screw Compound / Multi Start Threads

A thread that has more than one thread windings. usually to drive at high speed. screw profile shape can be triangular, rectangular, trapezoidal, balls and so on.