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Section 6
6-12
© Copyright 2009 GBC. All rights reserved.
Advanced Punch Service Manual
6.9.5
Stepper #1 Control
If punch is not enabled, the Advanced Punch will run in bypass mode (no punching).
Either the printer or the first sheet entering the machine will turn on both stepper motors.
The time is measured for the leading edge of the first sheet to pass sensor 8. Knowing the
distance between sensors and the time it takes for the sheet to pass both sensors, we can
determine the speed of the paper. The time is compared to a list and Stepper 1 and stepper
2 are adjusted to closely match the incoming speed.
If the punch is enabled, the backstop is raised, the brake is engaged, and both the transport
and punch motors are started. Also, the divert solenoid is activated to direct the sheets into
the punch path. As above, the input speed is measured, this time using Sensor 1 and 2.
Stepper 1 is adjusted to meet the measured input speed; Stepper 2 is accelerated to the
speed of the transport motor. Sensor 2 now delays for a time period based on the input
speed to ensure that the sheet has cleared the printer exit roller. After this delay, stepper 1
accelerates the sheet to match the transport speed. 19 msec after the sheet's trailing edge
passes sensor 2, Stepper 1 is decelerated to match the previously measured input speed.
6.9.6
Punch Control
The punch cycle begins 40 msec after the leading edge of the sheet reaches Sensor 3. The
brake is released, and the clutch is engaged. Sensor 9 now looks for the leading edge of its
flag, and when seen, the clutch is disengaged, and the backstop is lowered. When the
trailing edge of the flag is seen, the brake is engaged. When Sensor 3 sees the trailing edge
of the sheet, the backstop is raised.
6.9.7
Stepper #2 Control
72 msec after the leading edge of the sheet passes Sensor 6, Stepper 2 is decelerated to
match the measured input speed from the printer. This delay ensures that the sheet exits
from the transport rollers. When the trailing edge of the sheet passes Sensor 6, Stepper 2 is
accelerated to match the speed of the transport motor.
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Страница 195: ...Section 7 7 14 Copyright 2009 GBC All rights reserved Advanced Punch Service Manual 7 2 PCB Assembly ...
Страница 198: ...Installation and Set Up Advanced Punch Service Manual Copyright 2009 GBC All rights reserved 8 3 1 2 1 2 4x 1 2 4x ...
Страница 199: ...Section 8 8 4 Copyright 2009 GBC All rights reserved Advanced Punch Service Manual 2 1 ...
Страница 200: ...Installation and Set Up Advanced Punch Service Manual Copyright 2009 GBC All rights reserved 8 5 2 1 2 1 ...
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Страница 202: ...Installation and Set Up Advanced Punch Service Manual Copyright 2009 GBC All rights reserved 8 7 1 3 4x 2 2 1 ...
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Страница 204: ...Installation and Set Up Advanced Punch Service Manual Copyright 2009 GBC All rights reserved 8 9 ...