Fujitsu FTP-639MCL354 Spesifikasi Produk - Halaman 20
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Halaman Cetak③ In the low-speed drive (the low driving frequency), abnormal noises and the torque
reduction may occur due to resonance of the motor. In the low-speed drive, be sure to
perform sufficient evaluation and confirmation.
④ The reference exciting current when the pressurization power supply is applied is 440mA.
Applying any excessive electric current will generate the excessive torque and cause
mechanical damages; therefore, do not apply any electric current that exceeds the
requirement.
⑤ At the start of the high-speed printing and the start of the printing after turning off the motor
excitation, perform the speedup control.
(4) Thermistor (Motor) characteristics
B constant:
Resistance value R25:
Thermistor calculation formula: RX=R25×EXP{B×(1/TX-1/T25)} T: Absolute temperature
Operating temp. range:
200
180
160
140
120
100
80
60
40
20
0
-20
(5) Cautions
① If the motor is stopped and its excitation is turned off while the printing is being performed,
because of the elasticity of the rubber roller, troubles may occur at the restart of the motor:
the order of the printing may be disconnected, the printing may be smudged, white lines
may be inserted. When the printing contents are necessary to be continued, complete the
printing without interrupting once it is started. In addition, applying the slight electric
current in the waiting state can reduce effects such as deformation of the rubber roller, as
shown above. In this case, the reference electric current should be 150mA.
② When leaving the printer for the long term, turn off the excitation. Failure to do so, it may
cause heat generation of the motor and the driving elements.
③ The motor side wall temperature shall be equal or less than 90 degrees centigrade. If the
temperature exceeds 90 degrees centigrade, the coil inside of the motor may be damaged.
④ When any abnormal state occurs, stop driving the printer as soon as possible.
⑤ This printer performs one paper feeding operation of one dot line with four steps.
Therefore, for power saving and stable actions, when driving the motor with the 1 -2 phase
excitation, control the motor so that it is stopped in the 1-phase excitation state and started
in the 2-phase excitation.
⑥ Any printing action with the platen closed and no paper fed may wear the rubber roller and
damage the head. Do not perform the printing in this state.
Date
Design
Inspection
Rev.
Design
4000 K±2%
30 KΩ±5% at25℃
-40〜+125℃
0
20
Changes made
Inspect.
40
60
80
Temperature[℃]
FTP-639MCL354 SPECIFICATION
A1NA02273-0354
FUJITSU COMPONENT LIMITED
Approv.
100
120
Submit to
20 26