Installation manual

Publication 1747-RM001G-EN-P - November 2008
Application Example Programs G-5
Drill Mechanism Operation
When the operator presses the start button, the drill motor turns on. After the
book is in the first drilling position, the conveyor subroutine sets a drill
sequence start bit, and the drill moves toward the book. When the drill has
drilled through the book, the drill body hits a limit switch and causes the drill
to retract up out of the book. When the drill body is fully retracted, the drill
body hits another limit switch indicating that it is in the home position. Hitting
the second limit switch unlatches the drill sequence start bit and causes the
conveyor to move the book to the next drilling position.
Drill Up & Down Motion
The
following logic will control the up/down motion of the drill.
When the conveyor positions the book under the drill, the DRILL SQUENCE START BIT will be
set.
This rung uses that bit to begin the drilling operation. Because the bit is set for the entire
drilling operation, the OSR is required to be able to turn off the forward signal so the drill
can retract.
0000
B3:2
0
Drill Sequence
Start
OSR
B3:3
0
L
O:3
3
1746-OA16
Drill
Forward
When the drill has drilled through a book, the body of the drill will actuate the DRILL DEPTH
limit switch. When this happens, the DRILL FORWARD signal is turned off and the DRILL
RETRACT signal is turned on.
0001
I:1
4
1746-IA16
Drill Depth
Limit Switch
S:1
15
First Pass
I:1
5
1746-IA16
Drill Home
Limit Switch
U
O:3
3
1746-OA16
Drill
Forward
L
O:3
2
1746-OA16
Drill
Retract
Activate Drill Motor and Conveyor.
0002
I:1
5
1746-IA16
Drill Home
Limit Switch
O:3
2
1746-OA16
Drill
Retract
U
O:3
2
1746-OA16
Drill
Retract
U
B3:2
0
Drill Sequence
Start
B3:0
0
Machine Run
Latch
L
O:3
0
1746-OA16
Conveyor
Start/Stop
0003
END