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Old Rotation PA -> Encoder Table for IGRINS
Old Rotation PA -> Encoder Table for IGRINS
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 |
, multiple selections available,
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