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BL3x-MT-EN-08
page
42/59
6.2.
Belt tension adjustment
•
The tension of the belt(s) must be adjusted after replacement or after a certain time of operation, or when all
the motor power cannot be transmitted to the mechanism. As a consequence, the belt slips on the pulleys
and there is a formation of black dust. Proceed as follows to check the tension and/or replace the belt(s).
•
The barrier type BL32 with an 8-meter arm comprises a motor pulley (upper pulley) and a gearbox pulley
(lower pulley), with an intermediate pulley: see Fig. 25b. In all other cases, the mechanism comprises a
single driving belt: see Fig. 25a.
--
Arm the overload protection of the barrier by switching on the circuit breaker (
4:1
).
--
Open the barrier arm electrically to an angle of 90° by means of the OK button (4, p14).
--
Close it electrically again by pushing the OK button (4, p14).
--
Reverse the movement when the arm is half-way (angle of 45°).
--
By slipping slightly, the torque limiter must absorb the inertia of the arm (NOT THE V-BELT!).
--
If necessary, adjust the belt tension as follows, after switching off the circuit breaker (
4:1
):
Fig. 24
100
100
