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Table 3 Results of repeatability experiments (all values are in mm)

From: A concentric tube-based 4-DOF puncturing needle with a novel miniaturized actuation system for vitrectomy

Cannula module Stylet module
Stroke no. Test 1 Test 2 Test 3 Mean () Test 4 Test 5 Test 6 Mean ()
S1 0.001 0.044 0.240 0.095 0.188 0.261 0.122 0.190
S2 0.002 0.080 0.002 0.028 0.021 0.031 0.005 0.019
S3 0.002 0.048 0.088 0.046 0.020 0.045 0.135 0.067
S4 0.003 0.057 0.041 0.033 0.018 0.301 0.021 0.113
  Mean repeatability error 0.050 Mean repeatability error 0.097
  Standard deviation 0.030 Standard deviation 0.073