One style of robot that
has recently become quite popular is a combination
of the articulated arm and the cylindrical
robot. This robot has more than three axes
and is called a SCARA robot. It is used
widely in electronic assembly. The rotary
axes are mounted vertically rather than
horizontally. This configuration minimizes
the robot's deflection when it carries an
object while moving at a programmed speed.
The acronym SCARA stands
for Selective Compliance Assembly Robot
Arm, a particular design developed in
the late 1970's in the laboratory of Professor
Hiroshi Makino of Yamanashi University,
located in Kofu, Japan. The basic configuration
of a SCARA is a four degree-of-freedom robot
with horizontal positioning accomplished
by a combined Theta 1 and Theta 2 motion,
much like a shoulder and elbow held perfectly
parallel to the ground.
SCARAs are know for their
fast cycle times, excellent repeatability,
good payload capacity and a large workspace,
shaped somewhat like a donut. SCARAs also
feature sophisticated motion control with
full programmability. With its torso-based,
one arm design, the SCARA integrates easily
into most applications.
For flexible, high speed
parts assembly and handling, consider a
SCARA, one of the most useful and flexible
automation tools available.