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For a detailed Finder Chart and rotation setting see Kyle Kaplan's software. For rough rotations use the lookup table below.

133 193 = Default Encoder Setting at 90 deg. PA (slit east to west)

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)   = 133 193 - 90 + (Position Angle) = 43 103 + (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  

The encoder setting limits are:

Positon AngleEncoder Setting
0,180
43
103
15,195
58

118

30,210
73
133
45,225
88
148
60,240
103
163
75,255
118
178
90,270 (default)
133
193 (default)
105,285
148
208
120,300
163
223

135,315

178
238
150,330
193
253
165,345
208
268
180,360
223
283