Hubble Optics Ultra Light UL 16, Instruction Manual

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The primary mirror must be supported in the sling and not by the side pins. Point
UL16 about 15º above the horizon, an angle from which your can comfortably reach
and adjust the collimation screws.
You will need to use two wrenches to adjust the sling. Make sure that the sling is
hung through the slot on the left (or right) split bolt. Just wrap one or two turns on this
side. To do this, rotate the head of the bolt with one wrench and hold the opposing nut
with other wrench. Lock it tight.
Now go to the sling bolt on the other side. Hold the bolt head with one wrench and
loosen the opposing nut. Turn the bolt to wrap the sling until the mirror lifts off the
two lower pins. Raise the mirror until it almost touches the upper side pin.
Lock the bolt in this position by tightening the lock nuts. Check to make sure that the
mirror is indeed suspended on the sling by pushing on the back of the mirror with
your fingertips. With UL16 in a nearly horizontal position, you should be able to
move the mirror off the floatation cell support bars easily.
If the mirror tilts against one of the side pins, loosen the retaining nuts and rotate that
pin away from mirror until there is a few mm gap between the mirror and the pin.
The mirror must be supported be the sling and not be the side pins.
3. Collimate the Optics.
Keep the primary mirror covered during step 1. Point the telescope at 45° altitude
during the collimation step 1-3.
You need to make sure that UL16’s collimation will not shift when it is pointed at
different altitudes by tightening all locking nuts and screws properly along the entire
optical path:
•
Make sure the focuser is tightly locked in its square base
•
Make sure the focuser square base is tightly locked onto the focuser L bracket
•
Make sure the focuser L bracket is tightly locked onto the upper ring
•
Make sure all three spider vanes are tightly locked onto the spider hub and the
upper ring
•
The three collimation screws for the secondary mirror need to be properly
tightened after collimation
•
All knob screws for all the truss tubes need to be tightened properly
•
The three primary mirror lock screws need to be tightened properly
Two positions have been provided to mount the focuser for the convenience.
However, for the maximum collimation stability, and in particular for heavy
loads, the focuser should be installed directly on the top side of the Truss Tubes.
Step 1: Center the secondary mirror on the axis of the focuser drawtube.
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