Capabilities and limitations of
Lead through methods
During this programming
method, the traveling of robots is based on the desired movements, and it is
stored in the external controller memory.
There are two modes of
a control system in this method such as a run mode and teach mode. The program
is taught in the teach mode, and it is executed in the run mode.
The leadthrough
programming method can be done by two methods namely: Powered Leadthrough
Method
Manual
Leadthrough Method
Powered Leadthrough Method:
The powered lead through is the
common programming method in the industries.
A teach pendant is incorporated in
this method for controlling the motors available in the joints. It is also used
to operate the robot wrist and arm through a sequence of points.
The playback of an operation is
done by recording these points. The control of complex geometric moves is
difficult to perform in the teach pendant. As a result, this method is good for
point to point movements.
Some of the key applications are
spot welding, machine loading & unloading, and part transfer process.
Manual
Leadthrough Method:
In this method, the
robot‘s end effectors desired movements.
Sometimes, it may be
difficult to move large robot arm manually. To get rid of it a teach button is
implemented in the wrist for special programming.
The manual leadthrough
method is also known as Walk Through method. It is mainly used to perform
continuous path movements. This method is best for spray painting and arc
welding operations.
Limitation:
Lead through programming is not
readily compatible with modern computer based technology.
Robot cannot be used in production,
while it is being programmed.
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