Cut Sheet Feed Motor Encoder (Fme - Printronix L5000 Series Maintenance Manual

Cut sheet feed motor encoder (FME)

This is also a rotary encoder, comprised of a slotted plate attached to the cut–sheet
pick up motor rotating axis, with a light emitter and receptor on either side of the
plate. The motor rotation is detected by the pulse string that is created by light
passing through the rotating slotted plate. The revolutions of the cut–sheet feed motor
that carries out the paper need not be extremely precise. Therefore, the basic pulse
string fed back to the PPL (Phase–Locked Loop) circuit is compared to the basic
pulse string created via dividing the circuit of the crystal oscillator in both phase and
frequency.
D–16
Optional Cut Sheet Feeder