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14 • The CR-150 HD
Attaching the Counterweight Bar and Counterweights
The last item to be mounted before the telescope tube is the counterweight bar and
counterweights. Used to balanced the telescope, the counterweight bar attaches to
the opposite side of the mount as the telescope. To install the counterweight bar:
1. Retract the counterweight bar lock nut by turning it counterclockwise. This
will expose the threads on the end of the counterweight bar.
2. Thread the counterweight bar into the mount completely. Once again,
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threads into the mount opposite the telescope tubethreads into the mount opposite the telescope tube
threads into the mount opposite the telescope tubethreads into the mount opposite the telescope tube
threads into the mount opposite the telescope tube (see figure 2-7).
3. Tighten the counterweight bar lock nut fully for added support.
The counterweight bar is now installed. With the counterweight bar in place,
you are ready to attach the counterweights.
1. Lock the DEC clamp to hold the mount in place.
2. Remove the safety thumbscrew on the end of the counterweight bar.
3. Loosen the set screw on the counterweight itself so that the central hole of
the counterweight is unobstructed.
4. Slide the counterweight onto the counterweight bar. Move it high enough
to allow room for the second weight (see figure 2-7).
5. Tighten the set screw on the counterweight to hold it in position.
6. Repeat this process for the second weight.
7. Replace the safety thumbscrew on the end of the counterweight bar. The
thumbscrew will prevent the counterweights from sliding off the bar should
they ever become loose.
Figure 2-7Figure 2-7
Figure 2-7Figure 2-7
Figure 2-7