Newport New Focus 3502, Руководство пользователя

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Figure 11: Dimensions of Model 3502 Optical Chopper Head. Dimensions in inches (mm).
3.2.2
Chopper Motor
The operating life of the Chopper motor is limited. Long-term use of the motor
at high speed will result in faster wear and a shorter lifetime. Contact New
Focus for details about replacing the motor, if this becomes necessary.
3.2.3
Mounting a Wheel
Six wheels are shipped with Model 3502 Optical Chopper, shown in Figure 12
below. To install or change a wheel first power off the Chopper Controller.
Secure the chopping head to a work surface. Remove the four 4-40 screws that
secure the retaining cap over the wheel, while taking care not to bend the wheel
on the optical pickup. Install the replacement wheel, retaining cap, and 4-40
screws. Do not over-tighten the screws. Please note that if a wheel is bent during
the installation/removal process, it can be very difficult to straighten again. This
may degrade the stability of operation of the Model 3502 Optical Chopper
system, and a replacement wheel may be required.