Mitsubishi Electric Q172CPUN - Page 324

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7 MOTION PROGRAMS FOR POSITIONING CONTROL
[Related Parameters]
Speed limit value : The maximum feed rate of each axis is set.
(Refer to Section 6.4.1 for the speed limit value of the
parameter block.)
Circular interpolation arc error : The allowable error range for circular interpolation is
set.
(Refer to Section 6.4.3 for the allowable error range for
circular interpolation of the parameter block.)
[Program Example]
(1) The program which draws a circular arc of more than 180° at a negative circular
arc radius (R) value.
G91 G02 X50. Y50. R-50. F500. ;
Y
X
50
Start
point
Feed rate
500[mm/min]
End point X50, Y50
50
(Unit: mm)
(2) The program which draws a circular arc of 180° or less at a positive circular arc
radius (R) value.
G91 G02 X50. Y50. R50. F500. ;
Y
X
50
Start
point
Feed rate
500[mm/min]
50
End point X50, Y50
(Unit: mm)
REMARK
(1) The end point coordinates and circular arc radius cannot be omitted.
Always specify the end point coordinates and circular arc radius.
(2) Circular interpolation includes the [degree] axis whose stroke limit is set to be
invalid cannot be executed.
(3) Circular interpolation in the unit combination of [mm] and [degree] or [inch] and
[degree] cannot be executed.