Programming instructions

ADT-CNC4620 Programming Manual
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and the motion control mode is called point-position control.
The X axis and Z axis of this system are linked, which is two axes linked CNC system. This system
has linear, arc and thread interpolation function.
Linear interpolation: the synthetic motion track of X axis and Z axis is the straight line from the
start point to the end point.
Arc interpolation: the synthetic motion track of X axis and Z axis is arc from the start point to the
end point, the radius is specified by R, or the circle center is specified by I, K.
Thread interpolation: X axis, Z axis or two axes motion and principal axis rotation interpolation; F
specifies the pitch of threads, which is the movement (unsigned) of the axis (X or Z) that moves
longer when the principal axis rotates for a circle in the process of thread cutting. This system can
process metric straight thread, taper thread and end thread, and the machine tool must be installed
with principal axis encoder to process threads. If the encoder isn’t installed and it is threading, the
system can’t receive signals from the encoder and can’t perform other operations. (1000 wires
encoder or above is recommended for this system)
1.5. Absolute/relative coordinate programming
Two methods are available for specify the end position of the track during programming:
1: The end position of the track is expressed in absolute coordinates and it is called absolute
coordinate programming (instruction address uses X, Z).
2: The end position of the track is expressed with the coordinate difference of end point relative to
start point and it is called relative coordinate programming (instruction address uses U, W). The
negative value of relative coordinates represents running in negative direction of the axis, while the
positive value of relative coordinates represents running in positive direction of the axis.
This system allows expressing one axis of the end position with absolute coordinates and expressing
the other axis with relative coordinates in the same block. This method is called mixed
programming.
For example: A→B linear interpolation (as in Fig. 1-5)
Fig. 1-2-5
Absolute coordinates programming: G01 X200 Z50;
Relative coordinates programming: G01 U100 W-50;
Mixed coordinates programming: G01 X200 W-50; or G01 U100 Z50;