Chapter 3 Individual Operations
3.4 Stage Vertical Movement (Focusing)
35
3.4.4
Adjusting the Rotating Torque of the Coarse Focus Knob
Adjust the rotation torque of the coarse focus ring
(rotation resistance) by turning the torque
adjustment ring (TORQUE) located at the base of
the coarse focus knob. If the torque is too low, the
stage may descend with its own weight.
Rotate the ring in the
direction of arrow
To make the knob harder to
turn
Rotate the ring in the
direction opposite to arrow
To make the knob easier to
turn
3.4.5
Coarse Focus Stopper Ring
When the coarse focus stopper ring is rotated in
the direction of the arrow (labeled “CLAMP
→
”), the
coarse focus knob cannot be used to move the
stage any higher.
(Movement of the stage by the fine focus knob is
not restricted.)
If you must change specimens and move the stage
up/down repeatedly, it will save your time for
focusing that the coarse focus stopper ring is fixed
at the focus point.
Example usage
With the sample in focus, turn the coarse focus
stopper ring as far as it goes in the direction of the
arrow (labeled “CLAMP
→
”). When changing the
sample, lower the stage by turning only the coarse
focus knob. After changing the sample, gently raise
the stage by turning only the coarse focus knob as
far as it goes. The sample should be roughly in
focus.
Rotate the ring in the direction of
arrow as far as it goes
To restrict the movement of the
coarse focus knob
Rotate the ring in the direction
opposite to arrow as far as it goes
To release the restriction
Coarse focus torque
adjustment ring
Coarse focus
stopper ring
