Adjustment Of A Safety Threshold And A Wire Rope Slack Threshold - Tractel Group dynasafe HF 31/1/A2 Notice D'assemblage

2.5.4. 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:
Equipment required:
ACTIONS
Lift the two loads
1 (100 % + 10 % WLL)
by about 10 cm.
2
the safety threshold S1
3
correct operation.
4
the load "X".
5 the "Wire rope slack"
threshold S2
6
correct operation.
- Load limiter correctly mounted and wired.
- Adjustment screws unscrewed to the maximum.
- Hook free of any load.
- 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.
The additional 10 % represents the overshoot
value authorized in accordance with the European
directives.
Gradually screw in the threshold adjustment
screws (§ 2.1 point 06) until the NC contact opens
Adjust
(see § 2.3. b).
Use an ohmmeter, 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, the dynamic effect
Check
may produce an unintentional overload. In this
case, consult with a technician capable of
integrating a signal filtering device (example: time-
out, etc.).
Lift Wait for the load to stabilize before adjusting
the threshold.
Gradually screw in the threshold adjustment
Adjust screws (§ 2.1 point 07) until the NO contact opens
(see § 2.3. b).
Use an ohmmeter, for example, to check the state
of the contact.
Check Check that the micro switch for threshold S2 trips
when the "Wire rope slack" condition is reached.
11
REMARKS
GB