Milnor MWF27J8 Mantenimiento página 37

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button ( ). Do this test at the intervals given in the maintenance summary.
Definitions:
3-wire circuit—a series electrical circuit on a Milnor machine that must close before the
machine can operate. If a switch in the circuit opens, machine movement stops and the
operator alarm (a buzzer and a display message) comes on. When you push the start button (
1
), this closes the 3-wire circuit, which stops the operator alarm and lets the machine
operate.
emergency stop mechanism—a manual control that opens the 3-wire circuit when a person or
object operates the control. Examples - emergency stop button, kick plate, pull cord.
emergency stop button—a red push button on a yellow field that locks when a person pushes
it (the electrical contacts stay open). It is necessary to turn the button clockwise to unlock it.
A machine can have zero or more emergency stop buttons.
kick plate—a metal plate on a shuttle conveyor that operates a switch when an object applies
sufficient force to the plate. The kick plate is usually the first component of the shuttle to hit
an object in the shuttle path. All Milnor shuttles that go left/right on a path have kick plates
on the two sides of the machine.
WARNING 28 : You can be killed or severely injured if a shuttle strikes you even if you
come in contact with the kick plate first.
• Never do a test of the kick plate when the shuttle operates.
pull cord—a wire on a conveyor that operates a switch when a person pulls the wire. All
Milnor free-stand conveyors (a conveyor that is not a component of a larger machine) have
pull cords on the two sides of the conveyor.
Do a test of all emergency stop mechanisms on the machine as follows:
1. Apply power to the machine (
2. Push the start button (
a formula or operate the machine manually. It is not necessary to do the test when the
machine operates.
3. Operate an emergency stop mechanism (examples - button, kick plate, pull cord). If the
mechanism operates correctly, the operator alarm comes on. Did this occur?
Yes—Release the emergency stop mechanism if necessary. For example, if this is an
emergency stop button, turn the button clockwise to unlock it. Push the start button (
1
). Do the test on a different emergency stop mechanism. Continue until you do the
test on all emergency stop mechanisms on the machine.
No—An electrical component is defective. Shut down the machine. Do not let the
machine operate until you correct the problem.
M
).
1
). Do not cause the machine to operate. For example, do not start
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Chapter 3. Routine Maintenance
PELLERIN MILNOR CORPORATION