Duro Dyne PLSU3 Teoria de funcionamento

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Safety Operation:

Dump Valve and E-stops/Guard-interlocks

The new PLSU3 is equipped with modern safety features that includes two emergency

stop buttons (E-stops), a safety relay, a single solenoid air dump valve and cover/guard

interlock switches. The safety dump valve is connected directly to the main air regulator.

The safety relay is connected to the PLC [2] input and connected in series with the two

red E-stop buttons [3] (located on top of each side of the machine) and the front and

back guard-interlock switches [4].

to release its air pressure, locking out the cutting blade and internally locking out the

motor. If the machine loses electrical power, the dump valve will automatically dump all

the air from the system.

There are FIVE (5) ways to dump all air from the system and ensure cutting blade safety

when working on/operating the machine:

1) Pressing/pushing down either of the two

operation.

2) Lifting up the front safety shield (steel/clear Lexan shield protecting the two rollers),

which in turn, breaks the interlock switch.

3) Removing the rear clear Lexan safety guard, which would have to be removed by

extracting the screws with a Phillips head screwdriver and would in turn, break the

interlock switch.

4) Pulling back the quick release shutoff valve connected directly to the air regulator

underneath the machine.

5) Completely removing the air hose from the air regulator underneath the machine.

Cutting-Blade Safety

It is very important to be aware that when air pressure is loaded back into the system,

pressure will be engaged right back into the air cylinder that drives the cutting blade. This

will resume the cutting motion if the blade had not completed its path prior to the

machine's loss of air pressure. For example, if air pressure is lost while the blade has

completed half of its cutting path, it will complete the other half of its cutting path upon

loading air pressure back into the system. No body parts should be in the vicinity of this

moving blade at any time.

Motor-Drive Roller Safety

The motor driver roller is covered by the steel and clear Lexan composed front safety

shield; if the operator lifts this cover up the air will dump, and the motor will stop. If the

material has not reached the material eye sensor and the guard is lifted, the material will

stop feeding through. To resume feeding, the cover needs to be set back down and the

cut program will need to be resumed. The material will always retain its set distance.

Internally, the material drive roller will never be in motion while the cutting blade is in

motion to prevent any collisions between the material and the cutting blade.

PLSU3 Theory of Operation

Breaking any of these switches causes the dump valve

red

E-stop buttons at any time during