With Miyo-kun and Washimi-san
On Saturday 17th we re-routed cables in SR suspesions and connected them back onto the chamber. Namely, the cables were for IP and GAS LVDTs and fishing rod stepper motors. After the work we checked the system was functional. The IM OSEMs and oplev cables remain disconnected.
The polarity of the stepper motors is given in the tables below. It is important to bear in mind that the polatity given of the IP is not that of the motors directly, but of the virtual degrees of freedom (DoF). This is, it's given in terms of L, T and Y instead of H1, H2 and H3. Shoda-san wrote the code for actuating in the virtual DoF and the polarity of the motors likely can be read from her code.
| SR2, for a positive number of steps. | |
| Stage | LVDT motion direction |
| BF | negative (down) |
| F1 | negative (down) |
| F0 | positiv (up) |
| IP-L | positive (forward) |
| IP-T | positive T (left) |
| IP-Y | positive Y (counterclockwise) |
| SR3, for a positive number of steps. | |
| Stage | LVDT motion direction |
| BF | negative (down) |
| F1 | Fishing rod not functional. |
| F0 | positive (up) |
| IP-L | positive (forward) |
| IP-T | positive T (left) |
| IP-Y | positive Y (counterclockwise) |
| SRM, for a positive number of steps. | |
| Stage | LVDT motion direction |
| BF | negative (down) |
| F1 | negative (down) |
| F0 | negative (down) |
| IP-L | positive (forward) |
| IP-T | positive T (left) |
| IP-Y | positive Y (counterclockwise) |
(Page 197 in Fabian's notebook)