Nikon SMZ800N Instruction Manual page 29

 Torque of the focus knobs
The torque of the focus knobs can be adjusted. How the torque is adjusted differs depending on the device. Adjust the
torque to an appropriate level with the corresponding procedure.
Notes on the torque adjustment
When the torque is too low, the zooming body may slide down due to the various loads it carries, such as its own weight or the
load of the counterbalance spring inside the focus unit. This may result in injury, such as pinching fingers between the objective
and sample, or cause damage to the sample or objective. Be sure to adjust the torque to an appropriate level.
[Torque adjustment by turning the right and left focus
knobs in opposite directions]
 C-PSN/C-PSCN Plain Stand
 C-DS Dia Illumination Stand
 C-LEDS Hybrid LED Stand
 C-FMAN Focus Mount
 C-FMBN Focus Mount
[Torque adjustment by turning the torque adjustment ring
at the base of the left coarse focus knob]
 C-FMCN Focus Mount
Turn the torque adjustment ring using a hex driver (nominal
designation: 2). Turn the adjustment ring toward the back to
increase the torque. In the C-FMCN, turning the fine control
knob will cause the coarse control knob to also turn and
change the torque of the fine control knob.
A hex driver is fitted on top of each support pillar of the
P-PS32 Plain Stand, the P-DSL32 LED Diascopic Illumination
Stand or the P-DSF32 Fiber Diascopic Illumination Stand.
 Focusing stroke
 C-FMAN Focus Mount
Focusing stroke:
Stroke per focus knob rotation: 18.7 mm
 C-FMBN Focus Mount
Focusing stroke:
Stroke per focus knob rotation: 18.7 mm
 C-FMCN Focus Mount
Focusing stroke:
Stroke per focus knob rotation: Coarse control, 18.50 mm
 C−PSN/C-PSCN Plain Stand, C-DS Dia Illumination Stand,
C-LEDS Hybrid LED Stand
Focusing stroke:
Stroke per focus knob rotation: 21.7 mm
Focusing on a sample by vertically moving the stand's support pillar
The P-DSL32 LED Diascopic Illumination Stand and P-DSF32 Fiber Diascopic Illumination Stand have a focus dial at the
base front. Turn the dial to move the stand's support pillar vertically and focus on a sample with height variations.
Chapter 3
Specific Operations
40 mm
50 mm
50 mm (35 mm when
attached to the stand's
support pillar without an
anti-drop collar)
Fine control, 3.27 mm
100 mm
15
Adjusting the torque of the C-PSN focus knobs
(The torque is increased by turning the knobs as
shown in the figure.)
Torque increases
Adjusting the torque of the C-FMCN focus knobs
Torque adjustment ring