Program construction
Program:
The most controller are using as a job control language the symbols from the DIN66025. After this the partprogram are contains a sequence of lines.
A line contains several words.
A word contains a letter and a number.
Part program:
N10 G50 S2500
N20 G0 X500 Z500
N30 G0 X50 Z2 T0101 G97 S2500 M3 M8
24
OKUMA
Line:
N20 G0 X500 Z500
Word: |
X 500 |
|
Address Number
The separate line contains:
•Program technical information.
•Geometrical information.
•Technical information.
24
OKUMA
Program technical information:
For the execution of the program are necessary. For example : + Plus
— Minus
. decimal point
Geometrical information.
Means motion of some axis in the machine, the word for the motion is from that address G
( Engl. Word for Go ) and some numbers behind.
The most important G commands are: G00 positioning
G01 linear interpolation
24
OKUMA
Technical information. F = Feedrate
T = Tool
S = Spindlespeed
M = additional function
For example:
F – command = F0.25 T – command = T0101 S – command = S1000 M – command = M03
( mm/rpm ) ( Tool no. 1 ) ( 1000 rpm )
( spindle direction CW )
25
OKUMA
Main Address Characters
•N Block Number
•G Preparatory Function (See List)
•X Diameter Value
•Z Length Value
•F Feedrate (mm/min or mm/rev)
•(or Dwell time in seconds)
•S Spindle Speed (m/min or rev/min)
•T Turret Station/Offset Number
•M Miscellaneous Function (See List)
M – Function
M – function are help function, just to switch on some additional function, e.g. coolant on or off, C –axis on or off.
25
OKUMA
Lesson with G01
Program construction for 2 axis lathe machine
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Tool command |
|
|
|
|
G50 S4500 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
G Code for constant cutting speed |
|||||
G00 X500 Z500 |
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
G00 X0 Z2 |
T0101 |
|
G96 |
|
S250 |
|
M03 |
|
M08 |
|
|
|
|
|
|||||
G01 Z0 F0.15 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
M- code coolant on |
|
|
|
|||
G01 X40 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
G01 Z-20 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
M-code for spindle direction |
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
G01 X60 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cutting speed in m/min |
|
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
G01 Z-50 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
G01 X100 Z-80 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
G01 X140
G01 Z-110
G01 X160
G01 Z-130
G00 X500 Z500 M09
M02
Note
The G00 command means that the machine will move with rapid feedrate , the rapid feedrate is dependent on the machine. The unit for rapid feedrate is m/min.
The G01 command means that the machine will move with feedrate, therefore it is necessary to program in the first line with G01 a feedrate command.
The address for feedrate is ”F ” for example F0.25 = 0.25mm by one rotation of the spindle
OKUMA
Lesson with G85 Lap cycle
Program construction for G85 Lap cycle
G50 S4500
G00 X500 Z500
G00 X160 Z2 T0101 G96 S250 M03 M08
G85 NAP1 D5 
U0.5
W0.1
F0.35
F = Feedrate
W = Stock removal in Z
U = Stock removal in X
D = Cuttingdepth in diameter
NAP1 G81 
G81 = Cutting direction in Z - axis G01 X0 Z0
X40
Z-20
X60
Z-50
X100 Z-80
X140
Z-110
X160
G80
G00 X500 Z500 M09
M02
27
OKUMA
Exercise G85 /G81
28 ( 29 ) |
OKUMA |
|
Lesson G85 Lap Cycle in X - Direction
Blank material D= 162
Program construction for G85 Lap cycle in X -Direction
G50 S4500
G00 X500 Z500
G00 X162 Z2 T0101 G96 S250 M03 M08
G85 NAP1 D4 U0.5 W0.1 F0.35
NAP1 G82
G0 Z-110
G1 X140
G1 Z-80
G1 X100
G1 X60 Z-50
G1 Z-20
G1 X40
G1 Z0
G80
G00 X500 Z500
M02
Note
Please consider, the G82 contour description start from the spindle and will go in direction of the tailstock.
30 |
OKUMA |
|
Exercise G85 / G82
31 ( 32 ) |
OKUMA |
|
Lesson G85 Lap Cycle in Z – direction with blank contour definition
Blank material D= 162
G50 S4500 |
|
|
|
|
|
|||||
G00 X500 Z500 |
|
|
|
|
|
|||||
G00 X165 Z2 T0101 G96 S250 M03 M08 |
|
|
|
|
||||||
G85 NAP1 D4 U0.5 W0.1 F0.35 |
|
|
|
|
|
|||||
NAP1 |
G83 |
|
|
|
|
G – Code for blank material |
||||
|
|
|
|
|
||||||
|
|
|
|
|
|
|
|
|
|
|
G0 X0 Z5 |
|
|
|
|
|
|
||||
G1 X45 |
|
|
|
|
|
|
||||
G1 Z-15 |
|
|
|
|
|
|
||||
G1 X65 Z-45 |
|
|
|
|
|
|
||||
G1 X105 Z-75 |
|
|
|
|
Blank material definition |
|||||
|
|
|
|
|||||||
G1 X145 |
|
|
|
|
|
|
||||
G1 Z-105 |
|
|
|
|
|
|
||||
G1 X170 |
|
|
|
|
|
|
||||
|
|
|
|
|
|
|
|
|
|
|
G81 |
|
|
G – Code for longitudinal shape designation |
|||||||
|
|
|
|
|
|
|||||
|
|
|
|
|
|
|
|
|
|
|
G0 X0 Z2 |
|
|
|
|
|
|
|
|||
G1 Z0 |
|
|
|
|
|
|
||||
G1 X40 |
|
|
|
|
|
|
||||
G1 Z-20 |
|
|
|
|
|
|
||||
G1 X60 Z-50 |
|
|
|
|
|
Finish shape |
||||
|
|
|
|
|
|
|||||
G1 X100 Z-80 |
|
|
|
|
|
|
||||
G1 X140 |
|
|
|
|
|
|
||||
G1 Z-110 |
|
|
|
|
|
|
||||
G1 X160 |
|
|
|
|
|
|
||||
G1 Z-130 |
|
|
|
|
|
|
||||
G1 X162 |
|
|
|
|
|
|
||||
G80 |
|
|
|
|
|
|||||
G00 X500 Z500 |
|
|
|
|
|
|||||
M02 |
33 |
|
|
|
OKUMA |
|||||
|
|
|
|
|||||||
Exercise G85 / G83
34 ( 35 ) |
OKUMA |
Lesson G85 Lap Cycle with G84 changing cutting condition
Blank material D= 162
Program construction for G85 Lap cycle with changing cutting condition
G50 S4500
G00 X500 Z500
G00 X165 Z2 T0101 G96 S250 M03 M08
G85 NAP1 D4 U0.5 W0.1 F0.35
$ G84 XA=100 
NAP1 G81
G00 X0 Z2
G01 Z0 F0.1
G01 X40
G01 Z-20
G01 X60
G01 Z-50
G01 X100 Z-80
G01 X140
G01 Z-110
G01 X160
G80
G00 X500 Z500
M02
ZA=2 
DA=1 
FA=0.1
Feedrate
Cutting depth
Start point in Z for reduction of the cutting condition
Start point in X for reduction of the cutting condition
36 |
OKUMA |
|
Loading...