Programming instructions

ADT-CNC4620 Programming Manual
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the principal axis ratio adjustment key. In the main menu of the controller, you can press the left/right
key to modify the ratio, or use the principal axis ratio knob on the additional panel to modify
principal axis ration; to modify with the left/right key, the principal axis should be started first.
The actual rotation after the principal axis ratio is adjusted is limited by the maximum rotation of
the current gear position of the principal axis. The principal axis ratio isn’t saved after power off,
and the initial ratio after electrified is 100%.
2.3.4. Constant line speed control G96, constantrotation speed control
G97*
Instruction format: G96 S___; (S0000-S9999, leading 0 can’t be omitted).
Instruction function: constant line speed control is valid, specify cutting line speed (m/min),
and cancel constant rotation control. G96 is mode G instruction. If current mode is
G96, it is not necessary to enter G96.
Instruction format: G97 S__; (S0000-S9999, leading 0 can’t be omitted).
Instruction function: cancel constant line speed control and constant rotation control is valid,
specify principal axis rotation (r/m); G97 is mode G instruction. If current mode is
G97, it is not necessary to enter G97.
When the lathe is shaping workpiece, the workpiece usually rotates around the principal axis.
The cutting point of the tool may be considered as circle motion around the principal axis,
and the instant speed in circumferential tangent direction is called as cutting line speed (line
speed for short).
Constant line speed control function is valid only when principal axis rotation analog voltage
control function is valid. In constant line speed control, the principal axis rotation reduces
along with the change of X axis absolute coordinates of the programming track (neglecting
tool length compensation) and increase of X axis absolute coordinates, and the principal axis
rotation increases along with the decrease of X axis absolute coordinates, making cutting line
speed maintain at S instruction value.
Line speed = principal axis rotation *|X|*л/1000 (m/min)
In constant line speed control, Z coordinate axis of the workpiece coordinate system must
coincide with the principal axis, or else the actual line speed isn’t consistent with the specified
line speed.
2.3.5. Principal axis maximum rotation limit*
Use the value following G50S to specify the maximum principal axis rotation (r/m) of constant
line speed control
G50 S
;
In constant line speed control, the principal axis rotation is limited to the maximum if it is higher
than the value specified in above program.
2.4. Fast moving and feeding function (G98/G99, F instruction)
This system has three axis control modes, i.e. fast moving, cut feeding and manual feeding.
2.4.1. Fast moving
Fast moving: for lathe, X axis direction and Z axis direction move at independent speed, set
through #105 and #107 parameters, and the motion of the two directions doesn’t constitute