Sequence, Mcd (W/ Oper. Int.) - Signode MCD-710 Operation, Parts And Safety Manual

ELECTRICAL SEQUENCE, MCD MACHINES WITH OPERATORLESS INTERLOCK
1. GENERAL
Start by moving "E-Stop" to the "ON" position (pull out).
2. FEED CYCLE
Momentarily depress F.S. (6) to energize feed relay 1CR (6) through 1TR timed contact (6) 21-24 and 1TR
instantaneous (6) 17-18.
1CR (7) 19-17 closes to maintain 1CR (6) energized.
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1CR (4) 21-4 closes to energize feed starter F(3) 6-7, through LS2 feed limit switch (3) and T contact
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(3) 5-6.
3. TENSION CYCLE
2LS immediately:
Opens (3) 4-5 to de-energize feed starter F (3) 6-7.
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Closes (4) 4-12 to energize tension starter T (4) 13-7, and energize grip solenoid (5) 11-2 through
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1TR (5) 12-11.
! T closes (5) 14-12 to maintain itself through F (4) 12-13 and 1 CR (6) 3-14.
Motor runs in a tension direction resetting 2LS, contacts (3) closing and (4) opening.
4. WELD CYCLE
Motor continues to run in the tension direction to de-actuate 1LS (9), 3-15 which energizes 1TR (9).
! 1TR (5) 12-11 opens to de-energize the grip solenoid (5) 11-2.
! 1TR (5) 3-14 closes to maintain T (4) through contacts F (4) 12-13, and T (5) 14-12.
! 1TR (6) 17-18 opens to de-energize 1CR (6).
! 1TR timed contact (3) 3-4 closes, anticipating pre-feeding at the end of the weld cycle.
! 1TR timed contact (6) 16-17 opens to prevent another cycle until after pre-feed has taken place.
5. PRE-FEED CYCLE
At the end of the weld cycle, 1LS (9) is actuated, de-energizing 1TR (9) 15-2.
! 1TR (5) 3-14 opens to de-energize T (4).
! 1TR (6) 17-18 closes to allow 1CR (6) to get ready for another cycle.
1TR (3) 3-4 timed contact will open,
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de-energizing F (3), ending the pre-feed. 1TR should be set to feed strap 3/4 around chute.
1TR (6) 16-17 timed contact will close, allowing 1CR (6) to be energized for another cycle, after pre-
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feed, through the actuation of the footswitch FS (6) 3-16.
Machine is ready for next strapping cycle.
6. OPERATORLESS CONTACTS (OPTIONAL)
Contacts supplied by purchaser:
(1PC) N.C. contact on conveyor motor starter that opens whenever conveyor is running. This
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prevents the tension cycle from being started if conveyor is running.
(2PC) N.O. contact in conveyor package sensing circuit closes when conveyor has stopped and the
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package is in position and ready to receive strap. This signal must be held closed approximately
one second then signal must be removed.
Contacts supplied by Signode, circuit between terminals A and B:
! (4-5, A&B) N.C. circuit from Signode machine to be wired into conveyor run circuit. This circuit will
open when strapping cycle begins and close after strap has been applied.
NOTES: 2TR timer monitors the strapping cycle. If a malfunction occurs, 2TR times out, stopping the
motor. E-Stop must be pushed OFF to reset the timer.
Approximate 2TR Timer Setting: Pre-feed timer setting plus final feed time plus take-up time for minimum
package size plus 2 seconds.
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For Parts & Service 1-877-862-6699