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Samscreen suggest some Instructions regarding the
Installation and removal of the pianowire. Following are the some of
the most careful steps to kept in mind : |
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Installations :
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Remove the screen from the box. Be careful with
heavy wire screens as they are packed under tension and may spring
out when un-rolling them.
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Place the first hook at the anchor end of the screen
box. Make sure that it seats itself correctly.
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Pull the screen towards the tension end of the
screen box. Spread the moving profile strips to match up with the
cross members of the screen box.
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Place the free hook in the tension envelope and
insert the spring/tension bar. make sure that the tension bar is all
the way to the back of the hook and seated properly.
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Take up the slack in the screen by tightening the
tension nuts. When the wires in the screen have initially straitened
make sure the anchor end hook is still seated, that the profile
strips are located right above the cross members and that the
tension bar is seated correctly in the back of the tension hook.
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Start to tension the screen. Use 2 turn increments
and rotate the order of tightening. Continue to tighten in this
manner until the screen is taut. It is normal for center wires to
tighten first and then the outside wires. If you experience the
opposite loosen the screen and check that the spring bar has been
inserted the correct way.
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Proper tension is achieved when all the wires on the
screen are tight. It should be possible to run your fingers over the
screen and pluck individual wires and hear them sing.
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Make sure that the profile strip has seated itself
correctly over the cross members and that it is straight across the
deck.
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Run the machine for one or two hours, the stop it
and check tension on the screen again. Tighten again if necessary.
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Removal :
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Turn screening plant off, wait for the screen box to
stop vibrating and all moving parts to stop moving.
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Go to the tension end of the screen box and loosen
the tension nuts on the side of the screen box. If there are four
nuts loosen them in half turn increments and in rotation until the
tension is off the screen you are removing. If there are two nuts,
loosen them in half turn increments also. Once the tension is
released, it is OK to remove the nuts completely. If the tension "UBOLT"
can fall away from the machine leave the nuts turned one or two
threads.
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Remove the pianowire screen from the tension
envelope. This may be achieved by hitting the spring or tension bar
with a rubber mallet. if you have removed the tension nuts
completely, stay clear of the hook and spring bar as they exit from
the tension envelope.
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Remove the spring bar from the hook. If the
clearance is available simply leave the spring bar in position and
push the screen towards the anchor end. If the clearance is not
available, slide the spring bar through the tension take up slot in
the screen box sides.
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Pull the hook from the anchor end and discard the
screen in a suitable container.
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Check the tension and anchor ends of the screen box
for material build up that may interfere with the installation of
the new screen. Also check the cross members for any wear, looseness
or bends. If any of these conditions exist, they must be repaired
prior to installation of the new screen because un-repaired they
will have a negative effect on the service life of the screen
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