For a detailed Finder Chart and rotation setting see Kyle Kaplan's software. For rough rotations use the lookup table below.
363 133 = 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) = 363 133 - 90 + (Position Angle) = 273 + (Position Angle)
WARNING: We recommend you do not rotate the instrument more than +/- 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) | 3630,180 | 43 |
15,195 | 58 | |
30,210 | 73 | |
45,225 | 88 | |
60,240 | 103 | |
75,255 | 118 | |
90,270 (default) | 133 (default) | |
105,285 | 378148 | |
120,300 | 393163 | |
135,315 | 408178 | |
150,330 | 423193 | |
165,345 | 438208 | |
180 | 453 | |
195 | 468 | |
210 | 483 | |
225 | 498 | |
240 | 513 | |
255 | 528 | |
270 | 543,360 | 223 |