Positive load alignment mechanism

A positive load alignment mechanism comprising:

• a platform device including a base and a movable platform;
• three driving devices being disposed on three sides of the base, each driving device including a motor, a screw shaft and a connecting member, one end of the screw shaft being connected to the motor, and the other end of the screw shaft being inserted through the connecting member;
• three movable devices being disposed on the base and connected to the driving devices, each movable device including a mating member, a first guideway unit, a second guideway unit and a bearing member, the mating member being connected to the connecting member of the driving device, the first guideway unit being disposed on one end of the mating member adjacent to the base, the second guideway unit being disposed on the other end of the mating member, the first guideway unit being parallel to the driving device, the second guideway unit being vertical to the first guideway unit, the bearing member being disposed on the second guideway unit adjacent to the movable platform and disposed on one end of the movable platform;
• and
• three movable bearing platforms being disposed on the base adjacent to the driving devices, one end of each movable bearing platform supports the movable platform, and the movable bearing platforms being able to bear tension stress and compression stress that are applied to the platform device.