Miniature micro robot for spine surgery


Micro robot

Fitting pedicle screws or other implants in the spinal column requires extremely precise surgical procedures. To reduce the risk of human error and to favor minimally invasive micro-surgery techniques, a company has developed a new operating procedure involving a miniature hexapod. It instructed MPS Microsystems to develop and manufacture the micro robot. With a diameter of 50 mm, 80 mm in height and weighing 250 grams, this hexapod is the smallest on the market. The miniature hexapod has a unique structure comprising 6 linear actuators.

Characteristics

     

    Height: 80 mm
    Diameter: 50 mm
    Weight: 250 g
    Range: x-y, ± 20 mm; z, 100 mm
    Angle around x and y: ± 12 degrees
    Angle around z: ± 30 degrees

     

Miniature hexapod for spinal column surgery

Download

  • Application catalogue
    PDF
  • Product catalogue
    PDF


Structure of the miniature hexapod

The structure of the miniature hexapod comprises 6 linear actuators, each made up of:

  • A Faulhaber brushless motor, diameter 5 mm
  • A planetary gearhead with 1:125 reduction ratio
  • A screw-nut of 1.5 mm in diameter
  • A miniature inductive linear encoder

Each actuator, driven in closed loop, achieves a positioning accuracy of 1 micron over a total stroke of 10 mm.


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