Newport New Focus 3502, Руководство пользователя

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21
WARNING
The moving wheel may inflict injury. The operator should ensure the
safety of personnel who may be exposed to this hazard.
3.2.4
Mounting the Wheel Cover
WARNING
The wheel cover is provided for safety and its installation is
encouraged. The Chopper wheel can cause injury if it is touched while
rotating. This is especially critical if you find yourself reaching into
your optical set-up with the lights off. You may want to use the
Chopper wheel cover to reduce the chance of injury.
The wheel cover attaches to the Chopper Head with four screws. The wheel
cover is made of 0
.031” (0.80 mm) aluminum with an anti -reflective black
anodized coating. Two concentric slots, etched in both faces of the cover, allow
apertures of various sizes according to the table below. The wheel cover
dimensions are 5” x 5” x 0.5”.
Wheel Type
Largest Beam Diameter
Inner Cover Slot Outer Cover Slot
2-slot
0.295” (7.50 mm) 0.394” (10.00 mm)
60/2-slot
0.295” (7.50 mm) 0.107” (2.71 mm)
7/5-slot
0.295” (7.50 mm) 0.394” (10.00 mm)
42/30-slot
0.135” (3.44 mm) 0.138” (3.51 mm)
60-slot
- 0.107” (2.71 mm)
100-slot
- 0.064” (1.62 mm)
The wheel cover is also provided to reduce the generation of stray light that
could interfere with your measurements. The Chopper head uses an IR sensor to
detect Chopper wheel motion. The source in this sensor emits light of
approximate wavelength 950 nm. The wheel cover will greatly reduce the
amount of sensor-radiated stray IR light picked up by your experiment detector.
To install the wheel cover, first install a wheel on the Chopper hub. Then, slide
the wheel cover over the wheel. Please note that it can require some force to
separate the wheel cover’s mounting flanges far enough to fit over the motor
housing. Once the mounting flanges are lowered past the motor, align one of the
four flange holes with a threaded hole in the motor base and loosely attach the
cover to the base with one of the 4-
40 x 3/8” mount ing screws. Loosely fasten
the three remaining screws. Tighten the four screws after they are installed.