R-4104.A
AD.JUSTMENT | 3. Smooth Turning of the Right Fine Focus Knob | |
4. Parallelism between the Tube Attaching and Stage Attaching Surfaces | ||
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3. Smooth Turning of the Right Fine Focus Knob
!) Referring to Reassernbly Procedure (P. 32), insert right fine focus knob C@D into fine focus shaft e@ (beforehand, place set screw @ into C@D ). Pushing the left and right fine focus knobs inwards, fix thern in such positions by rneans of @ , that a torque of 30g - 40g is obtained. (Measuring procedure: Fig. 38).
2) Make sure of no thrust slack felt by touching with t he finger and no seizure between @ and right coarse focus knob @. Also, check for smooth tuming of the fine and coarse focus knobs.
4.Parallelism between the Tube Attaching and Stage Attaching Surfaces
For checking the parallelism, the top surface of tube receptacle (})serves as fiducial.
1)Bringing the too! collimator onto the top surface of tube receptacle 0. check the parallelism using a mirror placed on the surfaces (! ), (2) and (3) one after another, as shown in Fig. 44.
12'
/
~irror
(a) | (b) |
Fig. 44
2)The parallelism should be within the range as indicated in Fig. 44(b).
3)lf this range is overrun, make the parallelism adjcistment as foUows:
Viewing toward the fro=it of the microsccpé, release screws <@K4 (flrst, two of them,
and if not sufficient, ali the four), and ~wing the whole substage l1teraHy for
back and forth, until the parallelism c::imes vtithin the 5 >pecified range.
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