Pfaff ESW BETA SL Série Traduction Du Manuel D'utilisation Original page 25

Electric wire rope winch BETA SL
E nglish
3.9 Limit switch
If limit position cannot safely be overlooked by the operator, operating limit switches
have to be installed.
The limit switches have to be integrated into the circuit in a functionally correct manner.
Depending on the application, i.e. for cranes etc., additional emergency limit switches are stipulated.
They have to be designed ac. to the respective standards and checked.
The manufacturer of the entire installation takes the responsibility.
With mounted-in limit switches, definitely check function in connection with the entire installation.
With wrong polarity or wrong connection, the limit switches are ineffective. The winches can be
equipped with mounted on gear limit switch.
Attention: Do not operate the winch until having adjusted and connected the limit switches!
Please observe:
 Depending on design the adjustment precision of the limit switch is approx. ±50mm. This cut off preci-
sion can only be kept in the first layer.
 The after running of the winch is approx. 1/100 up to 1/500 of the lifting speed [m/min].
 In any case, it has to be observed that the elongation of the rope may change the lift limit positions.
The remaining elongation of the rope up to replacement state of wear may be approx. 1 %.
 A regular check of the adjustment / turn-off ways is necessary.
3.9.1 Adjustment: Gear limit switch – Stromag for size SL0
For contact adjustment, remove the cap of the limit switch.
Before adjusting the switching point assure that the live contact connection are cov-
ered by a protection against accidental touch or with flat plugs by a receptacle for
tabs, and that touching of the connections is excluded.
The limit switch is provided with individual or block adjustment.
Block adjustment
With the black adjusting screw (2) the base of all cam discs (1) can be commonly adjusted.
The relative adjustments of the individual contacts to each other are not modified. When turning the
black screw clockwise by one revolution, the cam discs as well are turned clockwise by 0,575°.
Individual adjustment
An infinitely adjustable cam disc is provided for each contact. Independently
from each other, the cam discs (1) can be set with the white adjusting screw (2).
It is not necessary to loosen any parts for the adjustment. The screw is self-
locked. The screw can be turned by means of a screwdriver of 10 mm or 4 mm
or by means of a hexagon socket screw key of 4 mm.
When turning the screw by one clockwise revolution 360°, the cam disc as well
is turned clockwise by 2,464° (view to the rear part, the B-side of the switch).
The standard cam discs are designed to dispose of a max. useful travel and a
max. overtravel. When exceeding the overtravel, the switch is not damaged.
The contact, however, is opened or closed again.
3.9.2 Adjustment: Limit switch - TER for size SL1-SL3
1. loosen the fixing screws (04) and remove the
cover (03)
2. for proper adjustment, loosen the central screw
(07) of the cam set, adjust the operating point
of each single cam by turning its screw (08)
(the numbers on the screws refer to the cams
counting from bottom to top), then tighten the
central screw (07)
3. close the limit switch cover using the screws
(04). Tighten the screws (04) with a torque of
80/100 Nm.
Maintenance steps
 check the tightening of the cable clamp
 check the proper tightening of the screws and cover
 check that the limit switch is properly fixed
 check the limit switch enclosure is not broken
technische Änderungen vorbehalten design changes under reserve
04.01.401/1000
changements techniques sous réserve
2
1
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