Tractel Dynasafe Mecha 3.2 Manual De Instalación, De Utilización Y De Mantenimiento página 10

The adjustment process should always be preceded by
a preload at 110% of the desired threshold.
EN
5.1. Factory preset load limiters
When you purchase a load limiter Dynasafe
3.2 & 7 with the factor preset option, the load limiter
is supplied with the adjustment screws and locknuts
locked with red varnish. The nameplate on the load
limiter indicates the threshold setting value and the
wire rope diameter for which the thresholds have been
adjusted.
5.2. Adjustment of a safety threshold
Preliminary conditions:
– Load limiter correctly mounted and wired.
– Adjustment screws unscrewed to the maximum.
– Hook free of any load.
Equipment required:
– A load (called «WLL») equivalent to 100% of the
nominal capacity authorized for the lifting machine.
– An additional load equivalent to 10% of the WLL.
ACTIONS
Lift the two loads
1 (100% + 10% WLL)
by about 10 cm.
Adjust the safety
2
threshold S1.
Tightening the
3
mounting screws
Check correct
4
operation.
5.3. Adjustment of a safety threshold and
an intermediate threshold
This configuration satisfies a number of applications
such as, for example, fast lifting speed conditioned to
load lifted. Audible or visual signal triggered at 90% of
the WLL. etc.
10
Mecha
TM
REMARKS
The additional 10% represents
the overload value authorized in
accordance with the European
directive.
Gradually screw in the threshold
adjustment screws (rep 3) until
the NC contact opens (§4.4).
Use a multimeter, for example,
to check the state of the contact.
When the calibration is achieved,
lock the adjustment screw
by tightening the locking nut
(fig. 14).
Lift a load equal to the WLL by
10cm, repeat this operation 3
times then, if required, tighten
the mounting screws (fig.9) to
16 N.m +/- 2.
It must be possible to lift the
"WLL" load. It must not be
possible to lift the "WLL" load
+ 10%. Depending on the lifting
speed, the dynamic effect
may produce an unintentional
overload. In this case, consult
with a technician capable of
integrating a signal filtering
device (example: timeout, etc.).
Preliminary conditions:
– Load limiter correctly mounted and wired.
– Adjustment screws unscrewed to the maximum.
– Hook free of any load.
Equipment required:
– A load (called «WLL») equivalent to 100% of the
nominal capacity authorized for the lifting machine.
– An additional load equivalent to 10% of the «WLL».
– A load «X» equivalent to the value of the intermediate
threshold.
ACTIONS
The additional 10% represents
Lift the two loads
the overload value authorized in
1 (100% + 10% WLL)
accordance with the European
by about 10 cm.
directive.
Gradually screw in the threshold
adjustment screws (rep 3) until
the NC contact opens (§4.4).
Use a multimeter, for example,
Adjust the safety
2 to check the state of the contact.
threshold S1.
When the calibration is achieved,
lock the adjustment screw
by tightening the locking nut
(fig. 14).
Lift a load equal to the WLL by
10cm, repeat this operation 3
Tightening the
3 times then, if required, tighten
mounting screws
the mounting screws (fig.9) to
16 N.m +/- 2.
"It must be possible to lift the
«WLL» load. It must not be
possible to lift the «WLL» load
+ 10%. Depending on the lifting
speed, the dynamic effect
Check correct
4 may produce an unintentional
operation.
overload. In this case, consult
with a technician
capable of integrating a signal
filtering device (example:
timeout, etc.)."
Lift the intermediate Wait for the load to stabilize
5
load "X". before adjusting the threshold.
Gradually screw in the threshold
adjustment screws (rep 3) until
the NC contact opens (§4.4).
Adjust the Use an ohmmeter, for example,
6 intermediate to check the state of the contact.
threshold S2. When the calibration is achieved,
lock the adjustment screw
by tightening the locking nut
(fig. 14).
Check correct Check that micro switch S2
7
operation. opens when the load "X" is lifted.
5.4. Adjustment of a safety threshold and
a "Wire rope slack" threshold
This configuration is particularly designed to detect a
"Wire rope slack" situation or "presence of a minimum
load" below which the signal generated by the micro
switch will be processed, for example, to stop the down
movement of the lifting hook.
REMARKS