An input roller device (50) includes a roller (58), an eccentric rotating mass (59) within the roller, a drive mechanism (54, 56 and 57) causing the eccentric rotating mass to rotate within the roller, and a processor (52) coupled to the drive mechanism. The drive mechanism can also optionally include a drive link (57) if not directly driven by the shaft of the motor. The input roller device 50 can further include a rotary encoder (60) coupled to the roller such that the rotary encoder can provide data to the processor on a rotation of the roller. Note, the ...
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