Introduction • On Precision Pots • General Product Definitions • Construction Details • Multiturn Precision Pots • Resistive Elements • Terminals • Shaft-Rotor Assembly • Mechanical Rotation • Mounting Methods • 3540 Family • 3590 Family • Knobpot 3600 Family • Single-Turn Precision Pots • 6537/6637 Family • 6539/6639 Family • 3680 Pushbutton Family • Special Precision Pots • Shafts • Mounting Styles • Bearings • Torque • Linearity • Wiper Load • Low Current Applications • High Rotational Speed • Angles • Additional Taps • Sealed Units • Multicup Assemblies • Envelopes • Environmental • Competition • Useful Terms

Shaft-Rotor Assembly

The shaft-rotor assembly consists of the shaft, the collector bar/contact fingers, the slider block, the rotor block and the wiper. Figure 11.4 shows the shaft-rotor assembly with the front lid.

The slider block is free to move back and forth along the rotor block. The wiper is centered between guides on the slider block. One end of the wiper makes mechanical and electrical contact with the collector bar. The other end of the wiper makes mechanical and electrical contact with the resistive element. The collector bar has contact fingers on the end, opposite the shaft, which ride on the collector ring.

Figure 11.4