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16 • The C150-HD
Attaching the Counterweight Bar and Counterweight
The last item to be mounted before the telescope tube is the counterweight bar
and counterweight. 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, it
threads into the mount opposite the telescope (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 counterweight.
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 (see figure 2-7).
5. Tighten the set screw on the counterweight to hold it in position.
6. Replace the safety thumbscrew on the end of the counterweight bar. The
thumbscrew will prevent the counterweight from sliding off the bar should
they ever become loose.
With the mount fully assembled, you are ready to attach the telescope to the mount.
Figure 2-7
Counterweight Bar
Lock Nut
Counterweight Bar
Counterweight
Counterweight Lock
Screw
Counterweight
Safety Screw