Takahashi e-130D, Instruction Manual

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◆Adjusting the Primary Mirror
⑧It is best to have the ε-130D on the
mount pointing as close to straight up as
possible to use gravity to make certain
that the movement of the mirror will be
permanent and it will ensure that the
cell is seated properly.
1. Loosen all the pull screws.
2. Then loosen all of the lock nuts.
3. Using the 14 mm open end wrench
tilt the primary mirror so that the
circle is moved to be concentric with
the pattern on the diagonal
reflection as seen through the
collimating eyepiece.
4. Then tighten the pull screw and all of
the locking nuts with 14 mm wrench.
Check the image after this is done to
make certain that the adjustment
has been locked in place.
Now, turn the focuser with the Camera
Angle Adjuster. As seen in the Fig. C-13
the crosshairs will orbit around the
center dot on the secondary mirror.
Therefore, further fine adjustment are
required.
Look from top side
Look from bottom side
This side looks wide
Compare these widths
Looking from top side Looking from bottom side
Pull Nut
Remember the width of the secondary holder (side
of the secondary holder)
Looking from top side of the focuser
Looking from bottom side of the focuser
Fig. C-17
Fig. C-18
Fig. C-19
Fig. C-20
Fig. C-21
Lock Nut
Push and Lock Nut for Collimation