Adjustment Of A Safety Threshold And An Intermediate Threshold; Adjustment Of A Safety Threshold And A "Wire Rope Slack" Threshold - Tractel Dynasafe Mecha 3.2 Manuel D'installation, Utilisation Et Maintenance

ACTIONS
Lift the two loads
1 (100% + 10% WLL)
GB
by about 10 cm.
Adjust the safety
2
threshold S1.
Check correct
3
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.
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
Lift the two loads
1 (100% + 10% WLL)
by about 10 cm.
Adjust the safety
2
threshold S1.
Check correct
3
operation.
10
REMARKS
The additional 10% represents
the overshoot value authorized
in accordance with the European
directives.
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.
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: time-
out, etc.).
REMARKS
The additional 10% represents
the overshoot value authorized
in accordance with the European
directives.
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.
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: time-
out, etc.).
Lift the intermediate Wait for the load to stabilize
4
load "X". before adjusting the threshold.
Gradually screw in the threshold
Adjust the adjustment screws (rep 3) until
5 intermediate the NC contact opens (§4.4).
threshold S2. Use an ohmmeter, for example,
to check the state of the contact.
Check correct Check that micro switch S2
6
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.
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 "Wire rope
slack" threshold.
ACTIONS
The additional 10% represents
Lift the two loads
the overshoot value authorized
1 (100% + 10% WLL)
in accordance with the European
by about 10 cm.
directives.
Gradually screw in the threshold
adjustment screws (rep 3) until
Adjust the safety
2 the NC contact opens (§4.4).
threshold S1.
Use a multimeter, for example, to
check the state of the contact.
It must be possible to lift the
"WLL" load.
It must be possible to lift the
"WLL" load + 10%.
Depending on the lifting speed,
Check correct
3 the dynamic effect may produce
operation.
an unintentional overload. In this
case, consult with a technician
capable of integrating a signal
filtering device (example: time-
out, etc.).
Lift the intermediate Wait for the load to stabilize
4
load "X" before adjusting the threshold.
Gradually screw in the threshold
adjustment screws (rep 3) until
the NO contact opens (§4.4).
Adjust the safety For more accuracy, take into
5
threshold S2. account the hysteresis in the
setting.
Use a multimeter, for example, to
check the state of the contact.
REMARKS