AstroMedia Hands-on Science Series 구축 지침 - 페이지 6

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Step 3
Fold the 3 glue tabs of the right side wall
[A3, sheet 2] backwards as well and glue the right
edge of the front wall to the glue tab in the same
way. Now the three walls form part of a box with the
base, back wall, and lid missing.
B. The Outer Lens Tube
The outer lens tube serves as a guide for the inner lens tube,
which will be built in Section D. The inner lens tube can be
moved back and forth inside the outer lens tube so that the
objective lens can be focused on objects at different dis-
tances.
Step 4
Remove the outer lens tube [B1, sheet 5]
from the cardboard and fold all 8 long groove lines
backwards. When you butt the edges of the two
half-segments at the ends of the piece of cardboard
together, a short octagonal tube is created that is
black on the inside. The small glue tabs marked in
grey are the foot tabs with which the tube will be at-
tached to the inside of the front wall. They all need
to be folded forwards towards the gold printed side.
In order to turn the folded piece of cardboard into
a stable octagonal tube, you need the connecting
piece [B2, sheet 7]. Glue it to the outside of one half
segment so that it sticks out exactly half way, then
glue it to the the other half. This works particular-
ly well if you press the tube flat, so that both edges
are pushed against each other without a gap. Make
sure there is about a millimetre of space between
the connecting piece and the foot tabs.
B2
Fig. 2: Outer lens tube
Step 5
Step 6
Step 7
Step 8
B1
Hold the outer lens tube horizontally and
turn it so that the side with the connecting piece
is facing downwards. Slide the foot tabs through
the octagonal opening in the front panel from the
outside and glue them to the glue marks located
around the opening.
Tip: Press the inside of the front wall onto your work
surface to push the foot tabs in place.
Fold the grooved lines of the edge rein-
forcement [B3, sheet 5] backwards and glue it onto
the glue marks around the opening of the outer
lens tube. The seam where the ends of the edge re-
inforcement meet should be at the bottom of the
outer lens tube.
Four supports are required to stabilise the
connection between the outer lens tube and the
front wall. Fold the foot tabs of the 8 support parts
[B4 to B11, sheets 1 to 4] forwards and glue each two
of them back to back to form four angled supports
with two foot tabs on one edge. As a test, first place
one of the supports with its foot tabs on one of the
glue marks on the outside of the front wall and push
it against the outer lens tube. The edge of the sup-
port without tabs butts against the wall of the tube.
Apply glue to the foot tabs and to the blunt edge
and glue the support in this position. Glue the oth-
er three supports in place the same way. The lower
support is glued to the connecting piece that holds
the outer lens tube together.
Fold the two mirror mounts [A4 and A5,
sheet 6] backwards at right angles. This creates
two angled strips that are black on the inside and
grey on the outside. Glue the mirror holders onto
the two glue marks located on the inside of the left
and right side walls.
Important: The folded edges must be exactly flush
with the edge of the glue marking to which the arrows
are pointing. The mirror itself will be installed in Sec-
tion E-2.