The information contained in this document is the property of Automatic Systems and is confidential. The recipient shall refrain from using it for any purpose other than the use of the products or the
execution of the project to which it refers, and from communicating it to third parties without Automatic Systems’ prior written agreement. Document subject to change without notice.
BL3x-MT-EN-08
page
44/59
•
The torque limiter is a safety device and is factory-adjusted. However, some further adjustment may be
necessary when the equipment has been installed or after a certain time of operation. Proceed with the
adjustment in the following cases:
--
Either the barrier arm does not open easily when a closing movement is reversed. The friction clutch
then slips and must be tightened.
--
Or the force needed to block the arm by hand during a closing or opening movement is too strong. The
friction clutch then sticks and must be loosened.
--
Or after a balance adjustment with the spring(s).
•
In either case, the state of the V-belt(s) must first be checked according to
paragraph [5.2. Belt tension
adjustment]
. Then proceed as follows:
100
26:2
26:1
Fig. 26
--
Loosen the 8 lock nuts (
26:1
).
--
Tighten the 8 screws (
26:2
) to tighten the torque limiter, untighten them to loosen it.
--
Switch on the circuit breaker (
4:1
).
--
Make an electrical opening/closing test by pushing the OK button (4, p14), and repeat the procedure
above until the desired result is obtained. Never forget to first switch off the equipment.
--
When the adjustment is completed, switch off the circuit breaker (4:1).
Attention
:
Proceed smoothly by 1/8th of a turn successively, since the adjustment is very sensitive. When the
adjustment is completed, do not forget to tighten the 8 lock nuts (
26:1
) firmly again.
IMPORTANT: Excessive tightening of the clutch may damage the gearbox!
•
To test the torque limiter adjustment, proceed as follows:
--
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 A/THE V-BELT!).
--
When the check is completed, switch off the circuit breaker (4:1).
6.4.
Limit switch adjustment
