Valley Rainger Linear, Руководство пользователя

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28 Rainger Linear
OVERVIEW
Safety Circuit
The safety circuit is a 120 volt AC control circuit that
starts in the control panel and runs the entire length
of the machine. See Figure 28-1.
Each drive tower box contains a safety microswitch.
The safety microswitches must be closed to com-
plete the safety circuit.
When the machine is in alignment, the safety
microswitches are closed. If the machine ever be-
comes too far out of alignment, a safety microswitch
opens, breaking the safety circuit. This stops the
machine to prevent structural damage.
Alignment
There are 2 types of span alignment for linear ma-
chines, modified or floating alignment. The type of
alignment used depends on the number of spans.
• Linear machines with five spans or less can use
modified or floating alignment. See Figures 28-2
and 28-3.
• Linear machines with six spans or more must use
floating alignment.
The end tower is the controlling tower. As the end
tower moves, all of the other towers move to maintain
straight alignment.
When the end towers move, they create an angular
deflection with the next tower, this closes the run
microswitches and causes the next tower to move.
This cycle repeats itself throughout the length of the
entire machine.
The result of these cycles is that any tower can be
moving at any time, depending on its relationship
with the next outer span.
See Maintenance section for adjustment procedure.
1
3
3
2
Figure 28-1 1. Safety circuit
2. Control panel
3. Safety Microswitch
Figure 28-2 Modified alignment
Figure 28-3 Floating alignment