Olympus BXFMA-F Manuel d'instructions - Page 16

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Fig. 7

Fig. 8

Adjusting the Motorized Focusing Unit

# Make sure that the specimen is located near the standard focusing

position (see diagram on page 25).

}Motorized focusing control is available using a PC or the U-FH focus

adjustment knob unit.

Using the U-FH Focus Adjustment Knob Unit (Fig. 7)

· F/C button 1

This button switches the objective adjustment movement caused by turn-

ing the focus adjustment knob between Fine and Coarse movements.

}For safety, the initial position that is set automatically when the main

switch of the BX-UCB control box is set to " I " (ON) is "F".

Fine adjustment:

Coarse adjustment: 1 mm per turn

· Objective Up button 2/Down button 3

Press either button to raise or lower the objective.

# When pressing the objective Down button, take care against collision

between the objective and specimen.

· Objective escape/return button 4

Before replacing the specimen, press this button to cause the objective

escape. Pressing the button again causes the objective return to the

original position.

Objective Lower Hardware Limit Adjustment (Fig. 8)

-- Adjust the lower hardware limit using the following procedure. --

?The lower hardware limit of the objective has been set to the lower limit

of the stroke before the system left the factory.

!During adjustment, do not approach your hand to the motor drive

mechanism so that your finger does not be caught by it.

# The lower hardware limit determines the lower limit of the objec-

tive to prevent it from collide with the specimen. As a result, note

that there is a risk of collision with specimen or reaching the lower

limit before the focusing position when the specimen is not flat, the

specimen thickness is changed or the WD (Working Distance) of

the objective in use is 1 mm or less.

# Always use the procedure described below. Otherwise, it will not

be possible to avoid collision of the objective with the specimen

perfectly.

# During adjustment, do not touch any electronic part to avoid its static

destruction.

# During adjustment, do not touch the motor mechanism or electronic

part to avoid their malfunction.

1. Set the main switch of the control box to " I " (ON).

2. Remove the side panel of the illuminator by removing the screws using a

Phillips screwdriver.

3. Among the objectives mounted on the revolving nosepiece, engage the

one with the shortest WD in the light path.

0.1 mm per turn