Delta D25886 User Manual Page 247

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4. Motion Control Instructions
4-206 DVP-MC operating manual
5. No matter whether in absolute mode or relative mode, the coordinates of the center of a circle
I_Value, J_Value, K_Value are always the relative coordinates with the start point as reference.
6. It is absolute mode for the instruction by default. Therefore, it is absolute mode for DNC_CW (IJK)
(G2) and DNC_CCW(IJK) (G3) if DNC_Absolute (90) and DNC_Relative (91) have not been
executed.
4.8.5.6 Circular/ Helical InterpolationRadius is Set
API
Controller
DNC_CWRG2
Clockwise circular/ helical interpolation
Radius is set
266
DNC_CCWRG3
Anticlockwise circular/ helical interpolation
Radius is set
10MC11T
Instruction explanation:
The two instructions are used for circular/helical interpolation. DNC_CW(R) (G2) is for clockwise motion and
DNC_CCW(R) (G3) is for anticlockwise motion.
Circular interpolation: The cutter performs the arc cutting of the processed workpieces at the feed speed
specified by parameter Velocity on the circular arc with the fixed radius on the specified plane
Helical interpolation: The cutter moves on the circular arc on the specified plane, which is circular
interpolation, meanwhile, makes the linear interpolation vertically on the specified plane at the feed speed
specified by parameter Velocity.
Explanation of input and output parameter of the instruction:
Parameter
name
Explanation
Data
type
Available
device
Execute
This instruction is executed when “Execute”
turns Off ->On.
BOOL M, I, Q, constant
X_Pos
The corresponding X-axis coordinates of the
terminal point of the circular arc
REAL Constant, D
Y_Pos
The corresponding Y-axis coordinates of the
terminal point of the circular arc
REAL Constant, D
Z_Pos
The corresponding Z-axis coordinates of the
terminal point of the circular arc
REAL Constant, D
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