REV.-A
PRINCIPLES OF OPERATION
2.3.4.6 Carriage Motor Software Control
This section describes the carriage motor software control.
Excitation System
The excitation system is determined by the firmware and is executed in accordance with the carriage speed,
as shown in Table 2-4. The motor drive sequence for each excitation system is shown in Tables 2-5 and 2-6.
Table 2-4. Phase-Excitation Method
Carriage Speed
Phase-Excitation Method
x3
900
pps
2-2
Phase
x2
600
pps
2-2
Phase
x15
900
pps
1-2
Phase
x1
600
pps
1-2
Phase
pps
= pulses per second
Table 2-5. Drive Sequence (2-2 Excitation)
Table 2-6. Drive Sequence (1-2 Excitation)
CR DIRECTION
Left
+
Right
Right
+
Left
Step No.
Phase A Phase B Phase C Phase D Phase A Phase B Phase C Phase D
1
ON
OFF
OFF
ON ON
OFF
ON
OFF
I
2
ON
OFF
1
OFF
1
OFF
ON
1
OFF
1
OFF
1
OFF
I
I
I
3
ON
OFF
ON OFF ON
OFF OFF
ON
4
OFF OFF
ON
OFF OFF
OFF OFF
ON
5
OFF
ON ON ON
OFF
OFF
ON
ON
6
OFF
ON
OFF OFF OFF
ON
OFF
OFF
7
OFF
ON
OFF
ON
OFF
ON ON
OFF
6
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
LQ-510
2-47
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