Shadow 8 User Manual
1139300
Installation and Checkout
2-49
Connecting AC Wiring to Power Source
If you have connected your light curtains to the optional Shadow 8 control, check to make
sure that all connections are secure and that all conduits are in place before connecting AC
power. Leave the transmitter and receiver loosely mounted. Then, connect the 115 Vac wires
from the control to the 115 Vac source. Make sure power is off before making connections.
Aligning and Tightening Down Shadow 8 Heads
If your brackets have been installed in the same horizontal and vertical plane (see Aligning
Brackets, page 2-21), alignment of your Shadow 8 optic heads should be relatively simple.
As long as the field of each phototransistor in the receiver is anywhere within the funnel-
shaped path of the corresponding light beam emitted by the transmitter (see Figure 2-25,
page 2-50), the two heads will align. Nevertheless, you should attempt to align your Shadow
8s as precisely as possible. Even a slight bump can knock an imprecisely aligned head out of
alignment.
When Shadow 8 heads are out of alignment, one or more transmitter beams are not detected
by the receiver, causing the Shadow 8 safety relays to open and stay open and your press to be
emergency-stopped. Individual Beam Indicator LEDs (IBIs) on the misaligned segment
illuminate when heads are out of alignment, and the Machine Run/Stop LED on the Main
Receiver is illuminated red.
IBI misalignment displays occur in two stages. The first stage, in which alternate IBIs along
the length of the misaligned head are illuminated, indicates that the required number of
consecutive beams are not aligned. The consecutive beam rule, which applies also to
blanking windows (see page 3-6), stipulates that between 7 and 9 consecutive beams on Main
transmitters or 2 consecutive beams on Extension transmitters must be detected by the
matching receiver in order for the press to run. The consecutive beams rule ensures that
Shadow 8 receiver(s) and transmitter(s) are able to synchronize their sequencing (see Shadow
8 Operation, page 1-6). The number of consecutive beams that must be aligned on Main
transmitters depends on the length of the heads, as shown in Table 2-13, page 2-50. The
consecutive beam requirement for Extensions is also shown.
TURN OFF HAZARDOUS EQUIPMENT DURING ALIGNMENT
Remove power from the press and other hazardous machinery while you are aligning the light
curtain transmitter and receiver.
Failure to comply with these instructions will result in death or serious injury.
DANGER
!
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