ADT-HC4500 Flame/Plasma Cutting Machine CNC System
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Chapter IV: Instruction Programming System
1. Description of programming symbols
Every motion of the CNC processing follows specified procedure, every processing program consists of several
instructions, every instruction consists of several function words, and every function word is started with letter
and followed by parameter value.
Definition of function words:
G Preparation function
M Auxiliary function
L Cycle times or delay time
X X axis coordinates: relative coordinates under G91 (default), absolute coordinates under G90
Y Y axis coordinates: relative coordinates under G91 (default), absolute coordinates under G90
I When processing arc, circle center coordinates minus X axis start value
J When processing arc, circle center coordinates minus Y axis start value
R Arc radius
2. Description of coordinates
2.1 Relative coordinates
In the coordinates system, if the position of current coordinates is calculated from previous coordinates’ position,
it is called as relative coordinates, as in the figure below:
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