Automatic locking mechanism. The alignment of all types of components on one line is a common task in a wide variety of areas: whether it is the positioning of stud frames in interior construction, the alignment of formwork and walls in civil engineering and building construction, precise attachment of facades or applications from industry in vehicle, ship or aircraft construction. Alignment rods, chalk lines or other mechanical aids are often used. For many applications, however, the accuracy achieved is not sufficient. In addition, their use is time, personnel and therefore cost-intensive. Alignment with a rotary laser is significantly easier and more precise. The innovative automatic locking mechanism guarantees that the laser light surface always corresponds to the target axis.
This article explains the operating principle in more detail and provides brief instructions for use. A rotary laser, a locking receiver and a measuring receiver are needed for use. Further details on the equipment can be found in section 3.
1. Setting up the devices
The rotary laser and locking receiver define the target axis. To this end, the laser is set up exactly above a first point using suitable accessories and the locking receiver above a second point of the axis. Please note: The locking receiver and rotary laser are paired with each other ex works! As a result, several systems can be used at the same time without them influencing each other. The exact deviations of the component from the laser surface are then determined with the help of a measuring receiver. GEO offers measuring receivers with different accuracies for this task. Read more in section 3.
2. The operating principle of the automatic locking mechanism
The operating principle of the automatic locking mechanism can be summarised in five simple steps.
- Two points are marked on the previously defined target axis above which the all-round laser and the locking receiver are set up.
- The devices are set up exactly above the markings on the axis with, for example, mechanical mounting aids with centering tips.
- The laser unit is switched on, and an automatically perpendicular laser plane is created in space by the rotation of the laser beam.
- The locking receiver is also switched on, and the automatic locking mechanism activated.
- The locking receiver then controls the laser remotely via radio so that the light surface is locked on its centre and kept there continuously.
3. Selection of equipment
Basically, any rotary laser with sufficient accuracy, which can be used vertically and has the necessary radio interface can be used. Depending on the measurement task required, we recommend the GEO laser RL-78L (only rotating laser plane without plumb beam), RL-87L (rotating laser plane and vertical plumb beam) or the precision laser PL-95L for particularly demanding and precise measurements.
The FE-53 is used as locking receiver. It can be used in combination with various GEO lasers for a variety of tasks. Its prime purpose is to lock the Y-axis (direction) of the laser. The serial numbers of the laser and receiver must be the same for this and are programmed at the factory. As soon as the rotating laser beam hits the receiver’s detection area, it is automatically directed to the centre and locked there. Read more.
The selection of the measuring receiver depends on the required accuracy. Our LE-96 receiver, for example, is ideal for everyday use on construction sites. It boasts a robust design with metal housing, is absolutely waterproof and has a short reaction time. It receives the rotating laser beam and indicates its position relative to the light surface by way of two LEDs and various signal tones. Read more
For precision measurements, GEO offers its very special LE-71 and LE-72 receivers with resolutions of 1/10 and 1/100 mm and various data acquisition, storage and transmission functionalities. Read more