1. Alpha numerical program input
Word address programming
CNC Mill
Alpha numerical program input

2. Basic Programing Terms
a. Character
Digit
Letter
Symbols
b. Word
c. Block
d. Program Format
Combination of digit, letter, symbol is called:
Alpha – Numerical Program Input
Word address programming

3. A. Program Number ( O _ _ _ _)
1. range from O through O9999
2. Letter O plus a four digit number
3. The only time letter o is used in program

4. Sequence Number B. Sequence Number (N_ _ _ _ )
indicates the sequence number of the block
1. Range from N0001 through N9999
2. Letter N plus a four digit number

5. C. Spindle Speed (S _ _ _ _ )
1. Range from S150 through S6000)
2. Letter S plus a three or four digit number)

6. 2. Letter F plus a number and a decimal point
D. Feed rate (F _ _ _. _ _ )
Designates the relative speed of the cutting tool with respect to the work
1. Range from F .04 through F
2. Letter F plus a number and a decimal point
3. programming in inches per minute (ipm)

7. Tool Function E. Tool Number (T _ _ ) 1. range from T1 through T 20
Designates the number of the tools to be used
1. range from T1 through T 20
2. Letter T plus a number

8. Input Function F. H Codes ( H _ _ ) 1. range from H 1 through H20
2. letter H plus a number
3. H codes are tool offset registers and must
correspond precisely to tool numbers,
i.e.,
T1 &H1, T2 & H2,

9. Input Function G. D Codes ( D _ _ ) 1. range from D 1 through D20
2. letter D plus a number
3. D codes are tool diameter offset registers and
must correspond precisely to tool numbers,
i.e.,
T1 &H1, D1

10. H. X Dimension (X _ _ _ . _ _ _ _)
1. letter X plus a number and a decimal
point in all instances expect when X = 0
2. leading and trailing zeroes can be omitted in
all dimensioning addresses
I. Y Dimension (Y_ _ _ . _ _ _ _)
J. Z Dimension ( _ _ . _ _ _ )

11. G codes , M codes
G code: Preparatory Function are used to set the control for various machine movement such as:
Linear interpolation G01
Rapid travers G00
Circular interpolation G02, G03
M code: Miscellaneous function direct the controller to execute the function indicated such :
End of program M02, M30
Tool Change M06
Turn the coolant off M09

12. Address:
G00
X-.375
S 800
F 8
M06
T 2
D05

13. N0020 G90 G00 X-2.5 Y 3.75 S1000 ; Words: N0020 G90 G00 X-2.5 Y 3.75
Block
N G90 G00 X-2.5 Y S ;

14. Part Programming
A part program is simply a series of command blocks that execute motions and machine functions to manufacture a part

15. End of presentation