Printronix L5035 Maintenance Manual page 300

Appendix D
Optional Power Paper Stacker
Stacker Motor Encoder (SME),
Elevator Motor Encoder (EME)
These sensors detect abnormal DC motor revolution. Each sensor consists of
a timing disk attached to the motor axis, a light emitter, and a light receptor.
The motor revolution is monitored by the length of time that blockages of light
occur between the light emitter and receptor.
Motor
678
Timing disk
Light emitter
and receptor