Chapter 3 Usage of Components
68
Using the focus knob
To avoid malfunction, never perform the following
operations:
• Rotate the right and left focus knobs in opposite
directions.
• Attempt to rotate the coarse-focus or fine-focus knob
beyond the rotation limit.
1.5x
3.11.2 Using the Coarse-Focus Knob Torque Adjustment Ring
The focus knob on the left side of the microscope is
equipped with a coarse-focus knob torque
adjustment ring for adjusting the torque of the
coarse-focus knob.
Operation:
Coarse-focus knob
torque adjustment ring
Torque of
the coarse-focus knob
Turn the ring to the rear
(counterclockwise)
Increase
Turn the ring to the front
(clockwise)
Decrease
Note: The torque of the fine-focus knob is fixed.
Using the coarse-focus knob torque adjustment ring
Adjusting the coarse-focus knob torque
Excessively loosening the coarse-focus knob torque adjustment ring might lower the nosepiece due to
its own weight, causing the specimen to become out of focus during observation.
Adjust the ring to obtain appropriate torque.
Coarse-focus knob torque
adjustment ring
Increase
Decrease
