◆ 2、Parallel Link Motion Base

The mechanism as shown the picture is called Parallel Link Motion Base which is used, for an example, for anti-oscillation table.  The unit has 6 sets of HySerpack which can make the following 6 types of movements simultaneously and independently: vertical, lateral, longitudinal, pitching, rolling and yawing.  This type of mechanism has widely been used for airplane flight simulators, various riding attractions at theme parks, etc., but recently there is growing tendency among machine tool manufactures to incorporate this type of mechanism into machine tools.  The reason being conventional machine tools have the slide mechanism of X-axis, Y-axis and Z-axis arranged in series, which reduces the strength of the structure and requires the reinforcement on the slide mechanism structure

The use of HySerpack has brought large improvements to parallel link motions in two aspects.

First, the parallel link motions base with HySerpack do not require any piping works beyond their battery limit.  This aspect makes installation of actuators on parallel link motion base much simpler, easier and quicker.  It also means the whole unit of a parallel motion link base can be place in a very small space.  Further more, because actuators are controlled electronically, no mechanical adjustment or tuning is required after installation.

Secondly, the parallel link motion base with HySerpack has only 6 fulcrums instead of 12 fulcrums which conventional parallel link motion bases require because the both ends of actuators are connected to the base or the table.  The theorem that all three vertexes of a triangle are located on a plane is taken into account and all ends of actuators (fulcrums of triangles) are connected in series by pin joints as sown in the picture above but at the same time each two units of actuators are arranged to be parallel to each other.

The parallel link motion base is structurally very strong because 6 triangles support the base and top tables.  It has also has very simple structure and is relatively light.  The software can also be simple.  The numbers of programming steps are so much reduced that the speed of control improves very much, which makes machine tools quicker and more precise.