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Application requirements for Quick Release (QR):
To avoid damage to the LA27 with QR, it is necessary for certain parameters to be specified in the application. You should therefore be aware of the
following facts when supplying an LA27QR to a customer.
Constant pressure on the actuator:
• The QR mechanism can handle a maximum of 100 N pull load otherwise it will risk jamming.
This means that the actuator must always have a load applied in order not to risk jamming and ensure correct operation.
• When the QR mechanism is activated, there must be a minimum load on the actuator in order to ensure that the actuator
runs inwards. This load depends on the spindle pitch:
5 mm must have 750 N load.
6 mm must have 500 N load.
Mechanical stop in the application:
• When the QR mechanism is activated, the actuator will run inwards until it is stopped either by the application or by the actuator.
The actuator is not constructed to absorb the impact that can occur when the QR mechanism is activated and the actuator is driven into
the endstop with a full load.
Therefore, a mechanical stop must be built into the application to stop the movement at a distance of 5 mm before the actuator moves into
endstop and blocks.
Activation of QR function:
• If the QR mechanism is activated during running of the actuator, the QR mechanism might jam.
To unjam the QR mechanism, it might be necessary to first run the actuator by means of the hand control.
Use the QR function:
• LA27 with QR is designed to be used as part of the bed backrest.
If the backrest needs to be brought in horisontal position as quickly as possible, the QR handle is activated to lower the backrest.
When the actuator is no longer in motion, the QR handle is released.
The QR cover must be mounted:
• To ensure that the Bowden cables are fixed correctly, the QR cover must be mounted.
Mount the cable in one of the cable mounting
holes/slots.
(If needed both holes/slots can be used)
Replace the Quick Release cover all the way
so that it “clicks” into place.
Mounting of the release cable:
Remove the Quick Release cover, and
the cable mounting holes can be seen.
Quick Release
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