For a detailed Finder Chart and rotation setting see Kyle Kaplan's software. For rough rotations use the lookup table below.
363 = Default Encoder Setting at 90 deg. PA (slit east to west) (NOTE: Default encoder setting was 393, but changed to 363 after installation of rotator)
Position Angle (Start north and go east, N=0, E=90, S=180, W=270 degrees, Default = 90 deg slit oriented east-west)
(Encoder Setting) = 363 - 90 + (Position Angle) = 273 + (Position Angle)
WARNING: We recommend you do not rotate the instrument +/- 90 degrees from the nominal 90 degree position to avoid entangling wires and hoses. The encoder setting limits are:
| Positon Angle | Encoder Setting |
|---|---|
| 285 | 198 |
| 300 | 213 |
| 315 | 228 |
| 330 | 243 |
| 345 | 258 |
| 360, 0 | 273 |
| 15 | 288 |
| 30 | 303 |
| 45 | 318 |
| 60 | 333 |
| 75 | 348 |
| 90 (default) | 363 (default) |
| 105 | 378 |
| 120 | 393 |
135 | 408 |
| 150 | 423 |
| 165 | 438 |
| 180 | 453 |
| 195 | 468 |
| 210 | 483 |
| 225 | 498 |
| 240 | 513 |
| 255 | 528 |
270 | 543 |