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7-4. Plunger (PM) Driver Circuit
Fig. 7-9. Plunger Driver Circuit
Fig. 7-10. Plunger Drive Timing
The mechanism section is equipped with the brake plunger (PM901, this plunger is included in the reel motor M903)
which turns ON/OFF the T/S reel table brakes and the FWD plunger (PM902) which carries out compression/release of
the pinch roller. They are driven by the driver circuit shown in
which turns ON/OFF the T/S reel table brakes and the FWD plunger (PM902) which carries out compression/release of
the pinch roller. They are driven by the driver circuit shown in
Fig. 7-9.
In the case of the FWD plunger, Pin !‚‚ (FPM-
ON) of the mechanism microprocessor (IC502) outputs “H” as shown in
Fig. 7-10.
during driving, and at the same time,
approximately 50 ms kick pulse is output from Pin 1 (FPM-KI).
As a result, an approximately 13V is added to the plunger, and the pole piece is sucked and the pinch roller is adhered.
When the kick pulse ends, the plunger is maintained by the 2V supplied to it via D505 so that power consumption is
reduced and heat from the plunger is controlled.
As a result, an approximately 13V is added to the plunger, and the pole piece is sucked and the pinch roller is adhered.
When the kick pulse ends, the plunger is maintained by the 2V supplied to it via D505 so that power consumption is
reduced and heat from the plunger is controlled.
D505
Q505
Q509
FPM-ON
+5V
Q504
PM902
FWD PLUNGER
+2V
+13V
FPM-KI
Q511
100
1
MECHA
MICON
IC502
IC502
mechanism
microprocessor
mechanism
microprocessor
Approx. 50 ms (PM kick)
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