-96-
7.3 Precautions when using stiffness control
The spring center position when using stiffness control is the position displayed on the teaching
pendant. The spring center position also moves when performing "teaching position search", and so if
a stiffness coefficient of other than 0.0 is set, the robot moves a little. Utilizing this characteristic, a
position on which no external force acts can be taught when using stiffness control as shown in the
following example.
[Example]
If inserting pins while following the workpiece shape with stiffness control(stiffness coefficient
≠
0),
external force acts on one side of the pin. By performing "teaching position search" at such times, the
robot can be moved in a direction in which no external force acts.
There may be cases in which the robot is unable to move to a position in which no external force acts
by performing this function only once. In such a case, perform several times while keeping an eye on
the force sensor data until the reaction force becomes sufficiently small.
External
force
produced
By performing "teaching position
search", the robot moves to a
position in which no external force
acts.
Copying movement with
stiffness control
Summary of Contents for MELFA BFP-A3614
Page 1: ...Mitsubishi Industrial Robot Robot Seminar Textbook Force Sensor Application BFP A3614 ...
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Page 34: ... 23 2 F series a CR750 D controller ...
Page 35: ... 24 b CR751 D controller ...
Page 36: ... 25 c CR750 Q CR751 Q controller CPU module ...
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