K. Nagano, Aritomi, K. Tanaka, Kita, Akutsu
Have checked polarity of the LVDTs and actuator coils of the TMS-VISX. See here for details.
LVDTs
I moved the suspended table by my finger while looking at VIS-TMSX_LVDTINF_**_INMON:
LVDT V1 | neg |
LVDT V2 | pos |
LVDT V3 | neg |
LVDT H1 | pos |
LVDT H2 | pos |
LVDT H3 | pos |
where
- Vertical: postive means that the LVDT outputs positive counts when TMS-VIS moves upward.
- Horizontal: postive means that the LVDT outputs positive counts when TMS-VIS moves positive yaw (counter clock wise from top view).
Actuator coils
We input positive counts to the actuator coils while looking at raw LVDT signals (VIS-TMSX_LVDTINF_**_INMON):
Actuator Coil | VIS-TMSX_LVDTINF_**_INMON |
V1 | neg |
V2 | pos |
V3 | neg |
H1 | pos |
H2 | pos |
H3 | pos |
So, considering the polarity of the LVDTs themselves shown in the first table, all the actuator coil provide force toward positive firection (vertical->upward, yaw->counter clock wise).