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DLQ-3000+
2.3.4 Ribbon Motor Controller/Driver Circuit
A PM-type stepping motor is used for the ribbon motor of this printer. It is driven by 1-1
phase or 2-2 phase excitation mode, based on the selected rotational speed. This motor
rotates in the both forward and backward directions and can stop at any position. Signal
PFA, /PFA, PFB and /PFB are output to drive each phase from the gate array (E05B46) via
the transistor array MP5302. Common voltage change signal (RF_R/H : Run/Hold) is output
from a port of the same gate array. To hold, both faces are driven simultaneously using the 5
VDC line. To switch between Run and Hold is operated by the signals RF_R/H output from
the gate array. While in the color ribbon mode, the printer switches mode between the copy
mode and normal mode according to the signal output from the paper thickness sensor. See
Table 2-11 for the ribbon motor drive term.
Motor type
Power supply voltage
Coil resistance
Drive frequency
Excitation mode
Consumption current
(mA/motor)
Drive mode
Gate Array
E05B46
RFA
RFA
RFB
RFB
VPB(+35V)
RF-R/H
Figure 2-15. Ribbon Motor Driver circuit Block Diagram
2-20
Table 2-11. Ribbon Motor Drive Term
4 phases / 48-pole / PM-type stepping motor
35 VDC
10%
76
10% (at 25°C per phase)
At color select:460, 600 pps
At ribbon feed:320, 640, 770 pps
At color select:2-2 phase
At ribbon feed:2-2, 1-1 phase
1-fold speed (fabric ribbon):350 - 390
At color select
Copy mode:
Normal mode: 400 or less
Constant current uni-polar drive (VPB line)
Transistor Array
MP5302
B1
B2
B3
B4
EP
BP
550 or less
C1
C2
C3
C4
+5V
CP
RFA
RFA
RFB
RFB
RF COM
Rev. A
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