
B-63944EN/02 PROGRAMMING 4.INTERPOLATION FUNCTIONS
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Limitation
- Cases in which linear interpolation is performed
• f the start point, mid-point, and end-point are on the same line,
linear interpolation is performed.
• If the start point coincides with the mid-point, the mid-point
coincides with the end point, or the end point coincides with the
start point, linear interpolation is performed up to the end point.
• If the start point, mid-point, and end-point are on the same line
and the end point lies between the start point and the mid-point,
the tool first moves with linear interpolation from the start point
to the mid-point, then returns from the mid-point to the end point
with linear interpolation. Thus, the tool always passes through
the specified point.
Start point
Mid-pointEnd
oint
- Whole circles
A whole circle (360° arc) cannot be specified. (This corresponds to the
case in which linear interpolation is performed, as described earlier.)
- Compensation functions
Before using this function, cancel the compensation functions of
group 07, such as cutter radius compensation.
- Manual absolute
While this function is in use, manual intervention is not possible with
the manual absolute switch set to the ON position. If intervention is
performed, alarm PS0713 is issued when operation restarts.
- Restrictions on commands
In the three-dimensional circular interpolation mode, the functions
listed below can be used, but the states of these functions must not be
modified.
• Inch input/metric input (An alarm is issued if a state
modification is made with G20 or G21.)
• Mirror image (The state of a signal must not be changed.)
• One-digit F code feed (No feedrate change must be made using
the manual handle.)