Nice S-BAR

ENGLISH – 11
10. insert the complete boom into the shell (I) of the support
all the way to the end
11. vigorously tighten the 4 screws of the support inserted
previously.
I
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l
After installing the boom and the rubber impact pro-
tector, before proceeding further, the other acces-
sories – if relevant – must be installed on the boom.
To install them, refer to the respective instruction
manuals.
3.9 ADJUSTING THE MECHANICAL LIMIT
SWITCHES
To adjust the limit switches, proceed as follows:
1. unlock the gearmotor with the relevant key provided (refer
to the “Manually unlocking and locking the gearmotor”
paragraph)
2. manually move the boom so that it completes a full open-
ing and closing manoeuvre
3. turn the screws of the mechanical stops (A - B) to adjust
the boom’s horizontal position, when it is closed, and its
vertical position, when it is open
B
A
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4. after making the adjustments, tighten the nuts vigorously.
3.10 BOOM BALANCING
The boom balancing operation is used to nd the best balance
between the overall weight of the boom, inclusive of the installed
accessories, and the force opposed by the tension of the bal-
ancing spring.
To verify the spring tension, proceed as explained below.
1. unlock the gearmotor with the relevant key provided (refer
to the “Manually unlocking and locking the gearmotor”
paragraph)
2. manually move the boom to about half-way (45°) and
leave it stationary
3. if the boom tends to rise, reduce the tension of the spring
(A). On the other hand, if the boom tends to fall, increase
the spring tension
4. put the boom in the maximum opening position
5. detach the balancing spring from its housing (B) and
shift its anchoring point towards the centre, to reduce
the spring tension, or towards the outside to increase the
spring tension
45°
45°
A
B
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Note The imbalance is acceptable when the force required
to move the boom during the opening and closing ma-
noeuvres and in all other positions is less than or equal
to half the maximum torque value (for this product,
roughly 5 kg at 1 m).
6. repeat the operation by positioning the boom also at
roughly 20° and 70°. If the boom remains stationary in its
position, it means that it is correctly balanced; a slight im-
balance is allowed, but the boom must never move sub-
stantially
7. lock the gearmotor.