alpha numerical program input

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

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