7. POSITIONING CONTROL
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7.8 Circular Interpolation Using Center Point Designation
Circular interpolation control by designating the end point and arc center point.
Circular interpolation control using center point designation uses ABS
and
ABS
(absolute data method) and INC and INC (incremental method)
servo instructions.
Items Set by Peripherals
Common Arc Parameter Block Others
Servo
Instruction
Positioning
Method
Number of
Controllable
Axes
Parameter Block No.
Axis
Address/Travel Value
Commanded Speed
Dwell Time
M Code
Torque Limit Value
Auxiliary Point
Radius
Center Point
Control Units
Speed Limit Value
Acceleration Time
Deceleration Time
Rapid Stop Deceleration Time
Torque Limit Value
Deceleration Processing on Stop Input
Allowable Error Range for Circular Interpolation
S-Curve Ratio
Cancel
Start
Speed Change
ABS
ABS
Absolute data
INC
INC
Incremental
2 ∆ !!! ∆∆ ! ∆∆∆∆∆∆∆∆∆∆∆OK
! : Must be set
∆ : Set if required
[Control Details]
Details of control with the servo instructions are shown in the table below.
Instruction
Servomotor
Direction of
Rotation
Max.
Controllable
Angle of Arc
Positioning Path
ABS
INC
Clockwise
Positioning
path
End point
Center point
Start point
θ
<360
°
0
°
<
ABS
INC
Counterclockwise
0° < θ < 360°
Positioning
ath
End point
Center point
Start point
θ
<360
°
0
°
<