9 Positioning Control
9.11 Circular Interpolation Operation
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FX3U-20SSC-H Positioning Block User's Manual
9.11 Circular Interpolation Operation
The circular interpolation operation is a positioning procedure, available only in the table operation.
The circular interpolation operation has the center coordinate specification/radius specification formats.
For details on controlling by table operation, and changing the operation speed, refer to the following sections.
→ For details on the table operation, refer to Chapter 10
→ For details on the operation speed change, refer to Section 7.6
→ For details on the torque limit, refer to Subsection 7.9.3
→ For details on the STOP command, refer to Section 7.4
→ For details on the radius specification, refer to Subsection 9.11.2
9.11.1 Circular interpolation [center coordinate specification]
The work piece moves from the start point to the target address, following the circular arc locus around the
specified center coordinate.
1. Operation
1) Set table information, X-axis speed, X/Y axis position (address) information and center coordinate in the
XY table information.
2) Set "table operation (simultaneous)" in the operation pattern selection.
3) When turning the X-axis START command ON at the table operation start number with the specified
circular interpolation (center, CW direction) / (center, CCW direction), the work piece moves to the target
position at the specified speed, following the circle’s center coordinate.
4) The work piece stops at the XY coodinate in target address 1, and the operation ends, turning the
positioning completion signal ON.
→ For the parameters, control data and monitor data, refer to Chapter 11
→ For details on the table operation, refer to Chapter 10
BFM Number
Data type
X-axis Y-axis
Table information (XY-axis) BFM #7000 to #12999 Table information
Table operation
(simultaneous)
Operation pattern selection BFM #520 b10 BFM #620 b10 Control data
Table operation start number BFM #521
BFM #621
*1
Control data
STOP command Operation command 1 BFM #518 b1 BFM #618 b1 Control data
START command Operation command 1 BFM #518 b9
BFM #618 b9
*1
Control data
m code OFF Operation command 1 BFM #518 b11
BFM #618 b11
*1
Control data
Change command in operation
disabled
Operation command 1 BFM #518 b12
BFM #618 b12
*1
Control data
Speed change command in
positioning operation
Operation command 1 BFM #518 b13
BFM #618 b13
*1
Control data
Maximum speed
Vector speed
(operation speed 1
of X axis)
Interpolation
time constant
Interpolation
time constant
Time
Speed
START command
Target address
(X,Y axis)
ON
OFF
OFF
ON
Positioning completion
ON
Center (i,j)
START point
Target address 1 (X,Y axis)
CW
(Clockwise)
CCW
(Counterclockwise)
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