For a detailed Finder Chart and rotation setting see Kyle Kaplan's software. For rough rotations use the lookup table below.
393 363 = 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) = 393 363 - 90 + (Position Angle) = 303 273 + (Position Angle)
Encoder should not go further than WARNING: We recommend you do not rotate the instrument +/- 180 90 degrees from the nominal 90 degree position to avoid entangling wires and hoses. The encoder setting limits are:
| Positon Angle | Encoder Setting |
|---|---|
| 285 | 228198 |
| 300 | 243213 |
| 315 | 258228 |
| 330 | 273243 |
| 345 | 288258 |
| 360, 0 | 303273 |
| 15 | 318288 |
| 30 | 333303 |
| 45 | 348318 |
| 60 | 363333 |
| 75 | 378348 |
| 90 (default) | 393 363 (default) |
| 105 | 408378 |
| 120 | 423393 |
135 | 438408 |
| 150 | 453423 |
| 165 | 468438 |
| 180 | 483453 |
| 195 | 498468 |
| 210 | 513483 |
| 225 | 528498 |
| 240 | 543513 |
| 255 | 558528 |
270 | 573543 |