Sky-Watcher EQ8 - Manual (Page 12)

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PART II: POLAR ALIGNMENT
2.5 Align the Polar Scope
Before using the polar scope for polar alignment, the polar scope itself must be calibrated to
ensure the pattern in the polar scope is aligned to the mount’s R.A. axis. This includes two
calibration routines:
Routine 1 - Align the pattern plate to the rotating axis of the polar scope
1. Choose a fixed object (the Polaris at night, or a faraway object in daytime); put the reticle
in the FOV of the polar scope on the object by adjusting the two azimuth adjustment knobs
and the latitude jackscrew of the EQ8 mount. Tighten the R.A. axis.
2. Rotate the large knurled ring on the polar scope for exactly half a turn (Fig 2.5a).
Fig. 2.5a
Large knurled
ring
3. If the object remains at the center of the reticle in the polar scope after the rotation, then it
means the polar scope’s pattern plate has been aligned to the polar scope’s rotating axis
and no calibration is needed.
4. If the object deviates from the reticle, then use a 1.5mm Allen wrench to adjust the three
small Allen screws on the polar scope (Fig. 2.5b) to eliminate the deviation to HALF. (Fig.
2.5c)
Fig. 2.5b Fig. 2.5c
6. Repeat steps 1-4 a few times until the object keeps at the center of the reticle when rotat-
ing the mount in R.A. axis