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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 (x̄)

Test 4

Test 5

Test 6

Mean (x̄)

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

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