Star Micronics PR921-24-A - Manual (Page 10)

– 7 –
200 ms
Presenter Outlet Presenter Inlet
CW
12
11
10
26 ms
1 s
9
CCW
ON
OFF
ON
OFF
ON
OFF
Paper Position
Terminal Shorted and
Motor Stopped
Sensor 3 turns OFF, then, if sensor 2 turns OFF,
it is determined that the paper has been
recovered. Under all other conditions, it is
considered that paper has been pulled out.
DC Motor
Sensor 1
Sensor 2
Sensor 3
(3) Paper Recovery Operation
If the sensor 2 and sensor 3 detection signals are ON after a determined amount of time has passed,
the paper recovery operation is performed.
9 DC motor rotates counterclockwise by the paper recovery instruction.
0 Sensor 3 detects trailing edge of paper and sensor 3 turns OFF.
A Sensor 2 detects trailing edge of paper and sensor 3 turns OFF.
B 1 second after sensor 2 turns OFF, DC motor is braked for 200 ms and stopped.
Note: The distance between sensor 2 and sensor 3 is 7.8 mm. Therefore, the amount of time
required for sensor 2 to turn OFF after sensor 3 turns OFF is 26 ms. It is necessary to
enable detection in that amount of time.