Table 1.
Translational accuracy of the 6DTC by using 6DOF platform and the robot couch in lateral, longitudinal, and vertical directions.
Translational displacement (mm) | Lateral error (mm) | Longitudinal error (mm) | Vertical error (mm) | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
6DTC | Robot couch | 6DTC | Robot couch | 6DTC | Robot couch | ||||||||
X/Y | Z | Mean (ABS) | SD | Mean (ABS) | SD | Mean (ABS) | SD | Mean (ABS) | SD | Mean (ABS) | SD | Mean (ABS) | SD |
−200 | – | 0.25 | 0.02 | 0.17 | 0.02 | 0.25 | 0.02 | 0.05 | 0.02 | – | – | – | – |
−150 | −120 | 0.12 | 0.01 | 0.15 | 0.01 | 0.26 | 0.08 | 0.06 | 0.02 | 0.15 | 0.02 | 0.08 | 0.02 |
−100 | −100 | 0.03 | 0.02 | 0.00 | 0.02 | 0.12 | 0.07 | 0.06 | 0.02 | 0.15 | 0.03 | 0.09 | 0.02 |
−50 | −50 | 0.11 | 0.02 | 0.10 | 0.01 | 0.12 | 0.06 | 0.08 | 0.02 | 0.08 | 0.02 | 0.03 | 0.02 |
50 | 50 | 0.12 | 0.02 | 0.00 | 0.01 | 0.07 | 0.03 | 0.01 | 0.01 | 0.10 | 0.03 | 0.06 | 0.01 |
100 | 100 | 0.10 | 0.02 | 0.10 | 0.01 | 0.09 | 0.03 | 0.08 | 0.02 | 0.12 | 0.02 | 0.12 | 0.01 |
150 | 120 | 0.10 | 0.03 | 0.21 | 0.01 | 0.15 | 0.07 | 0.09 | 0.02 | 0.17 | 0.02 | 0.18 | 0.01 |
200 | – | 0.04 | 0.01 | 0.01 | 0.01 | 0.06 | 0.02 | 0.09 | 0.01 | – | – | – | – |