SEQUENCE OF OPERATION
INITIAL CONDITIONS:
A. MAIN AIR ON
B. POWER SWITCH OFF.
C. VACUUM CUP TROLLEY CYLINDER IS EXTENDED. (SOL. 5)
D. MINOR FLAP FOLDER CYLINDERS ARE RETRACTED. (SOL. 6)
E. CASE PUSHER CYLINDER IS RETRACTED. (SOL. 4)
F. VACUUM SWITCH IS ON.
GENERAL SEQUENCE:
1.
Press the
"START"
push-button (PB 2). Motor contactor (M1) is energized and
the motor starts.
2.
Normally open contact (M1) closes, programmable controller is energized, and
the sequence starts.
3.
The case pusher and vacuum cup trolley go to home position.
4.
As soon as proximity switches 2 and 3 are activated , the vacuum cup trolley
(output 102) moves forward to pick-up a blank.
5.
At the extended position, the vacuum cup trolley activates proximity switch 1
(input 002) energizing timer 4. After a pre-set time, timer 4 times out, de-energizing
vacuum cup trolley solenoid (output 102).
6.
The vacuum cup trolley then returns to the home position, activating proximity
switch 2 (input 003) energizing the minor bottom flap folders (output 104).
7.
Proximity switch 2 energizes timer 3. After a preset time, timer 3 times out de-
energizing the vacuum solenoid (output 103). The formed case is released, ready
for case transfer.
8.
As the chain lug is detected by photocell 1 (PC 1), the internal relay 1004 turns on
the case pusher solenoid (output 106), allowing the case pusher to move forward
and push the formed case towards the feed rollers, and then into the chain lug drive.
Summary of Contents for CASEFORM 40
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