State function of preparatory and miscellaneous code with two examples each.

State function of preparatory and miscellaneous code with two examples each.
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1 Answer

Answer :

Function of Preparatory Code (G-Code):

Preparatory functions are the G-codes that identify the type of activities the machine will execute.

[1] A program block may contain one or more G-codes.

[2] G codes are designated by the letter G and a two digit numeric value proceeded by G i.e. G00, G99.

[3] These codes are the most important functions in CNC programming because they direct the CNC system to process the coordinate data in a particular manner.

[4] The preparatory function enables the controller to interpret the data which follows and it precedes the coordinate words. E.g. G01 is used to prepare the controller for linear interpolation.

Examples of Preparatory Function (G-Code): (Any two)

Some examples of preparatory functions are given below;

G00 Rapid Traverse

G01 Linear Interpolation

G02 Circular Interpolation (Clockwise)

G03 Circular Interpolation (Counter Clockwise)

G04 Dwell

G05 Hold/Delay

Function of Miscellaneous Code (M-Code):

The miscellaneous function word is used to specify certain miscellaneous or auxiliary functions which do not relate the dimensional movements of the machine.

[1] The M word is used to specify certain miscellaneous function such as spindle starts, spindle stop, coolant ON/OFF etc.

[2] The miscellaneous function as are those functions which do not related to the dimensional movement of the machine.

[3] These function actually operate some control on the machine. E.g. M02 which indicate end of program.

Examples of Miscellaneous Function (M-Code):

M00 Program Stop

M01 Optional Stop

M02 Program End Without Rewind

M03 Spindle ON Clockwise (CW) Rotation

M06 Tool Change

M08 Coolant On

M09 Coolant Off

M30 Program Stop and Tape Rewind
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