Edge/Edge Blanket Operating Principles
5-19
Transfer Phrase
This phase begins when the transfer clamp
assembly moves forward to take the corners of the
flatwork piece from the clutch-brake rollers.
MPC1 energizes SV13, causing the
rodless air cylinder to move forward
until a signal is received from PX6,
indicating it has reached the end of its
travel.
MPC1 briefly re-energizes SV9 and
SV10 to turn the clutch-brake rollers
until the piece can no longer be seen by
photosensor sets PE4/PE5. At this point,
the piece is held against the clutch-
brake rollers by the transfer clamp nylon
rollers.
MPC1 energizes SV14 and SV15,
causing the transfer clamps to grip the
sheet corner edges.
MPC1 de-energizes SV13, causing the
rodless air cylinder to move backward,
taking the flatwork with it.
At the same time, MPC1 energizes
SV22, causing the floor push plate to
move forward, helping with the sheet’s
travel into the spread section.
Also at the same time, MPC1 energizes
INV3 (upper spreader motor), causing
the spreader clamps to move toward the
center of the machine.
At the end of the transfer phase, if
necessary, the machine de-energizes
SV8 to lower the upper inlet conveyor to
process the next piece.
•
•
•
•
•
•
•
Spread Phase
This phase begins when the spread clamps take
the flatwork piece from the transfer clamps.
A signal from PX12 indicates the clamps
have reached their home position and
MPC1 de-energizes INV3.
MPC1 energizes SV16 and SV16R,
causing the spread clamps to close and
grip the flatwork.
At the same time, SV14 and SV15
are de-energized to open the transfer
clamps.
Now Motor 3 (upper spreader) is
energized via INV3, causing the spread
clamps to move toward their respective
endframes.
As the piece spreads, the taut sensors
(PE14A/B) briefly detect the corner/
edges of the item. At this point, both
sensors must see the piece at the same
time; otherwise, an error condition is
assumed and the piece is dropped.
In addition, the MPC1 board must
receive a signal from PX9, indicating
that the upper spreader belt is in motion.
If it fails to receive the signal, an error
condition is assumed. The machine
stops and displays the appropriate error
message in the CHI Panel.
As the piece spreads, the MPC1 board
uses the size data calculated during
the Input Phase and the setting of the
SPREAD SLOW BUFFER to determine
when to slow the spread speed.
As the piece spreads, its top edge rises
until it is detected by the taut sensors,
which causes the machine to slow the
spread process to its slowest speed.
When MPC1 stops receiving a signal
from PX9, it indicates that the piece has
been fully spread. INV3 is de-energized.
•
•
•
•
•
•
•
•
•
To Next Page
Loading...
