Operating Principles Edge/Edge Blanket
5-20
Discharge Phase
This phase begins after the piece has been
spread. An air blast occurs to begin the process of
laying the flatwork piece down on the discharge
ribbons.
MPC1 energizes SV20L and SV20R
which produces an air blast that blows
the top of the sheet onto the discharge
conveyor.
At the same time, MPC1 de-energizes
SV16 to open the spread clamps.
Once the current piece has cleared the
tail sensors (PE13/27), the system allows
processing of the next piece to continue.
This helps to prevent overlapping and to
maintain a gap between items.
The piece travels on the discharge
conveyor ribbons until it completely
clears the spreader/feeder.
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Error Conditions
Various operating conditions can result in an
error condition.
As noted, if, during the spread phase,
the taut sensors (PE14A/B) do not
simultaneously detect the piece, the
resulting error condition causes the piece
to be dropped to the floor.
Also, as noted, if, during the spread
phase, the MPC1 board does not detect
a proper signal from PX9, one of two
conditions occur:
If no signal is received, the machine
is stalled. It shuts down and the
appropriate message displays in the
CHI Panel.
If some signals are received, an error
condition is assumed and the piece
is dropped to the floor.
If any of the wall sensors
(PE15/16/22/23) detect the piece, an
error condition is assumed and the piece
is dropped to the floor.
If the MPC1 board receives a signal
from the crossbeam sensor (PE26),
an unsafe condition is assumed and
the machine immediately shuts down
and releases all compressed air. The
appropriate message displays in the CHI
Panel.
If the MPC1 board receives a signal
from the inlet capacitive switch
(PX24/25), an unsafe condition is
assumed and the machine immediately
shuts down and releases all compressed
air. The appropriate message displays in
the CHI Panel.
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