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6 POSITIONING CONTROL
6.9.1 Circular interpolation specified method by helical interpolation
The following method of circular interpolation is possible for the helical interpolation.
The specified method of circular interpolation connected start point and end point at
the seeing on the plane for which performs circular interpolation are as follows.
Servo instruction Positioning method Circular interpolation specified method
ABH Absolute
Radius-specified method
less than CW180°
INH Incremental
ABH Absolute
Radius-specified method
less than CCW180°
INH Incremental
ABH Absolute
Radius-specified method
CW180° or more.
INH Incremental
ABH Absolute
Radius-specified method
CCW180° or more.
INH Incremental
ABH Absolute
Central point-specified method CW
INH Incremental
ABH Absolute
Central point- specified method CCW
INH Incremental
ABH Absolute
Auxiliary point-specified method
INH Incremental
[Cautions]
(1) The helical interpolation instruction can be used at the both of real mode/virtual
mode.
(2) When the travel value of linear axis is "0" is set, it can be controlled.
Condition Operation
Number of pitches is 0
Same control as normal circular interpolation control.
(Allowable error range for circular interpolation can be set.)
Number of pitches is not 0
Linear interpolation to linear axis does not executed, circle for the
number of pitches is drawn on the circle plane.
(Allowable error range for circular interpolation can be set.)
(3) Units for linear axis have not restrictions.
(4) Circular interpolation axis has the following restrictions.
• When the unit of one axis is [degree] axis (with stroke range), set another axis
also as [degree] axis (without stroke range).
• The axis of [degree] unit as without stroke range cannot be set.
• The axis as without stroke range cannot be set in the virtual mode.
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