10
ELECTRICAL SEQUENCE, MCD MACHINES W/O OPERATORLESS INTERLOCK
1. GENERAL
Start by moving "E-Stop" to the "ON" position (pull out).
2. FEED CYCLE
Momentarily depress F.S. (6) closing 3-16 to energize feed relay 1CR (6) through 1TR timed contact (6)
16-17 and 1TR instantaneous (6) 17-18.
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1CR (7) 3-17 closes to maintain 1CR (6) energized.
!
1CR (4) 3-4 closes to energize feed starter F(3) 6-7, through LS2 feed limit switch (3) 4-5, and T
contact (3) 5-6.
3. TENSION CYCLE
2LS immediately:
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Opens (3) 4-5 to de-energize feed starter F (3) 6-7.
!
Closes (4) 4-12 to energize tension starter T (4) 13-7, and energize grip solenoid (5) 11-2 through
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.
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1TR (5) 3-14 closes to maintain T (4) through contacts F (4) 12-13, and T (5) 14-12.
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1TR (6) 17-18 opens to de-energize 1CR (6).
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1TR timed contact (3) 3-4 closes, anticipating pre-feeding at the end of the weld cycle.
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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 TR(9) 15-2.
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1TR (5) 3-14 opens to de-energize T (4).
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1TR (6) 17-18 closes to allow 1CR (6) to get ready for another cycle.
1TR (3) 3-4 timed contact will open,
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-
feed, through the actuation of the footswitch FS (6) 3-16.
Machine is ready for next strapping cycle.
Motor runs in the feed direction until strap activates 2LS.
For Parts & Service 1-877-862-6699
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