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Table 4 Results of the tool length (LOT) determination for bone sample (all values in mm)

From: Calibration procedure and biomechanical validation of an universal six degree-of-freedom robotic system for hip joint testing

Direction

xR

yR

zR

3 D CAD

Delphi transformation

Position 0

25.737

− 0.005

365.337

366.242

367.96

Position 1

26.137

− 1.822

365.124

366.063

367.69

Position 2

25.777

− 0.326

365.467

366.375

366.54

Position 3

25.353

− 1.013

365.626

366.505

367.37

Position 4

25.380

− 0.270

365.600

366.480

366.79

Position 5

24.015

0.963

366.347

367.135

367.10

Average value

25.400

− 0.412

365.584

366.467

367.24

Median deviation

0.159

0.114

− 0.050

− 0.039

0.48

Max deviation '+'

0.737

1.375

0.763

0.668

0.72

Min deviation '−'

1.385

1.410

0.459

0.404

0.13