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4MELFA-BASIC IV
[Explanation]
(1) In circular interpolation motion, a circle is formed with three given points, and robot moves along the cir-
cumference.
(2) The posture is interpolation from the start point to the end point; the transit point posture has no effect.
(3) If the current position and start point do not match, the robot will automatically move with linear interpola-
tion (3-axis XYZ interpolation) to the start point.
(4) If paused during execution of a Mvr instruction and restarted after jog feed, the robot returns to the
interrupted position by JOINT interpolation and restarts the remaining circle interpolation.
The interpolation method (JOINT interpolation / XYZ interpolation) which returns to the interrupted
position can be changed by the "RETPATH" parameter. (Refer to
ting after jog feed at
(5) If the start point and end point structure flags differ when equivalent rotation (constant 2 = 0) is specified,
an error will occur at the execution.
(6) Of the three designated points, if any points coincide with the other, or if three points are on a straight
line, linear interpolation will take place from the start point to the end point. An error will not occur.
(7) If 3-axis XYZ is designated for the constant 2, the constant 1 will be invalidated, and the robot will move
with the taught posture.
(8) Constant 2 designates the posture interpolation type. 3-axis XYZ is used when carrying out interpolation
on the (X, Y, Z, J4, J5, J6) coordinate system, and the robot is to move near a particular point.
(9) This instruction cannot be used in a constantly executed program.
MVR P1, P2, P3
Moves by XYZ
interpolation (3-axis
XYZ interpolation)
P_CURR
Fig.4-12:Example of circular interpolation motion path 1
4-219 Detailed explanation of command words
pause")
P2
P3
P1
Page 369, "5.10 Automatic return set-
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