Digital Equipment LA30 N, Service Manual

Page: 125 / 141

5-34
Unlike carriage spacing, paper is fed at only one speed (Figure 5.33), and driving is always done using 2-phase
excitation (Figure 5.34).
Paper
feed
speed
5.6 ips
Time
Figure 5.33 Paper feed speed
Figure 5.34 1/2-phase excitation of paper feed
Idle Operating
LFM0
(
φ
A)
LFI1, 2
LFM1
(
φ
B)
LFM2
(
φ
C)
LFM3
(
φ
D)