Olympus BH2 Series Desmontagem, limpeza e remontagem completas - Página 14
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Também para Olympus BH2 Series: Manual de resolução de problemas e ajuste (46 páginas), Desmontagem, limpeza e remontagem completas (23 páginas), Desmontagem, limpeza e remontagem (45 páginas), Manual (6 páginas), Manual de instalação (9 páginas)
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Figure 22 – Remove the left-hand coarse-focus knob
Remove Stop Screw for the Pre-Focus Lock Collar
The M3X6 headless slotted shoulder screw beneath the
pre-focus lock collar needs to be removed before the
pre-focus lock collar can be removed. This stop screw is
staked in place with adhesive, and it is best to soften
this adhesive with gentle heat before removing it. Be
careful when applying heat to the stop screw. Heat the
stop screw as best you can while at the same time
minimizing the heat exposure to the plastic stop collar,
to prevent the stop collar from melting or deforming.
Use a baffle of some sort to shield the plastic stop collar
from the hot air of the heat gun. Once the M3X6
headless slotted shoulder screw has been heated, use a
small (3mm) slotted screwdriver to loosen and remove
the stop screw (see
Figure
Figure 23 – Remove the stop screw for the lock collar
Disassemble the Pre-Focus Stop Mechanism
To disassemble the pre-focus stop mechanism, the
brass shaft mount on the left-hand side needs to be
removed from the coarse-focus shaft. Apply heat to the
brass shaft mount to loosen the adhesive holding the
two perpendicularly oriented M3X5 setscrews in place.
Be careful to not deform or melt the plastic stop collar
when heating the brass shaft mount. Use a 1.5mm
Allen tool or driver to loosen and remove the two M3x5
setscrews securing the brass shaft mount to the coarse-
focus shaft (see
Figure
Complete Teardown, Cleaning, and Reassembly of the Olympus BH-2 Coaxial Focus Mechanism
23).
24). If the fit of the 1.5mm
driver seems loose, try using a 1/16" driver instead,
since it is a bit larger than the 1.5mm driver.
Figure 24 – Loosen setscrews holding brass shaft mount
After both of the setscrews have been removed from
the brass shaft mount, rotate the pre-focus lock collar
counterclockwise to release the pre-focus stop. This
step is necessary to minimize the possibility of
damaging the coil spring under the brass shaft mount
while loosening and removing the brass shaft mount in
the following steps. Once the pre-focus stop has been
released, grasp the brass shaft mount with non-marring
pliers to hold it stationary (see
holding the brass shaft mount stationary with the non-
marring pliers, rotate the coarse-focus knob on the
right-hand side counterclockwise to loosen the brass
shaft mount from the coarse-focus shaft. It may be
necessary to apply gentle heat to the brass shaft mount
first, to soften any dried grease that may be holding the
brass shaft mount to the coarse-focus shaft, but do not
melt or deform the plastic stop collar.
Figure 25 – Hold the brass shaft mount stationary
Set the pliers aside.
stationary with one hand, and with the other hand,
reach around to the right-hand side of the pillar arm
and rotate the coarse-focus knob counterclockwise until
Figure
25).
Hold the brass shaft mount
Revision 4
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