ALPHA NUMERICAL PROGRAM INPUT

Word address programmingCNC Mill

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

• A. Program Number ( O _ _ _ _) 1. range from O 0001 through O9999 2. Letter O plus a four digit number 3. The only time letter o is used in program

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

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

• D. Feed rate (F _ _ _. _ _ )• Designates the relative speed of the cutting tool with respect to the work

1. Range from F .04 through F 196.00 2. Letter F plus a number and a decimal point 3. programming in inches per minute (ipm)

Tool Function

• E. Tool Number (T _ _ )• Designates the number of the tools to be used

1. range from T1 through T 20 2. Letter T plus a number

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,

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

• 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 ( _ _ . _ _ _ )

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

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

• Words:• N0020• G90• G00 • X-2.5 • Y 3.75 • S1000 • ;

• Block

• N0020 G90 G00 X-2.5 Y 3.75 S1000 ;

Part Programming• A part program is simply a series of command blocks that execute motions and

machine functions to manufacture a part

End of presentation