Pine Research MSR 636A, User Manual, Page: 30 / 176

24
2.4 Motor Unit Components
The table below and the photographs on the next page (see Figure 2.5) identify
the major components of the motor unit.
26 Motor Cable Connector Accepts one end of motor control cable
27 Upper Brush Pair (red)
These upper brushes make contact on
opposing sides of the rotating shaft and are
used to make contact with rotating disk
electrodes and rotating cylinder electrodes.
28 Lower Brush Pair (blue)
These lower brushes make contact on
opposing sides of the rotating shaft and are
used to make contact with the ring
electrode when working with rotating ring-
disk electrodes.
29 Clamshell Doors
These doors open to permit access to the
brush chamber.
30 Door Latch Secures clamshell doors in closed position
31 Brush Contact
Spring-loaded silver-carbon brush provides
electrical contact with the rotating shaft
32 Motor Coupling Used to attach the shaft to the motor
33
Motor Coupling
Hex Screw Pair
Hex screws located on either side of the
motor coupling tighten to hold the shaft
inside the motor coupling
34 Electrode Shaft
The top end of the rotating shaft is mounted
in motor coupling and the active electrode
surface is at the bottom end of the shaft.
35 Lower Bearing Assembly
An easily replaceable bearing assembly
stabilizes the rotating shaft at the point where
the shaft exits the motor unit. Metal and
ceramic bearings are available.