Measuring arms – applications – contact measurements

Measuring arms – applications – contact measurements

Measuring arms are devices that are widely used in many different industries. These types of measuring tools also make work easier in many cases, providing important support for workers. Measuring arms are distinguished by their versatile use, as well as their accuracy and versatility. All this makes them play a very big role today and it is difficult to imagine their absence. So what is the primary use of measuring arms in industry?

Measuring arm – basic information

The described device is portable (mobile) and allows to measure elements of different sizes, both smaller (e.g. 0.1 m – 0.5 m) and sizable (e.g. up to 4.0 m). As for the precision of measurements, they are most often used in situations where dimensional tolerance is required and at 0.10 mm per meter (e.g., 1000.00 mm ± 0.05 mm). The most accurate measuring arms can maintain an accuracy of 0.01 mm – 0.03 mm throughout their working range These types of tools are able to record surface shape and geometric features in a short period of time. In addition, the measuring arm allows dimensional analysis and checking of individual parameters directly on the production line.

How are the mobile devices used?

The measuring arm can be encountered in various industries. It will come in handy wherever quality control or accurate alignment of machines is needed up to about 3-4 meters. Many companies also use them at the prototyping stage and to verify the status of first-run products. Then, the obtained data is compared with the geometry of the 3D model ( CAD files: igs, stp, parasolid, etc.). This type of equipment can be found wherever precision and dimensional repeatability are crucial. Thus, we are talking about the construction of various types of tools, needed, for example, in the aerospace, automotive or shipbuilding industries.

Measuring arms are most commonly found in the automotive and aerospace industries. Other popular industries include. Prototyping, casting, and welded structures. In addition, they are used at the stage of supply control. With their help, it is possible to check in a relatively short period of time whether any components meet the specified requirements. The measuring arm is widely used in manufacturing. We are talking about checking the 3D geometry of parts not only on the production line, but also the repeatability of the production machine itself.

What else is worth knowing about the use of measuring arms in industry?

As for the manufacturing material, aluminum was used in the past but has been supplanted by carbon fiber. The design is based on three longitudinal elements that are connected to each other by rotary joints. Encoders (incremental or absolute) are mounted at the joint of the joints. The encoder converts rotary motion into an electrical signal with great precision, which is transmitted and read in the control system.

Measuring pins, also known as contact probes, are responsible for recording readings. Attached to the end of the probe is a ball with a precisely made diameter. Measuring probes come in a wide variety of diameters. They are usually made of various materials such as ruby, silicon nitride, zirconium oxide, ceramic or tungsten carbide. Thanks zircons. Thanks to the extremely precise manufacturing of all arm components, these devices achieve an extraordinary level of accuracy in relation to the size of the measuring range.

What additional components does the measuring arm still consist of? The device is powered by a rechargeable lithium-ion battery. Temperature sensors also play an important role, as well as sensors that report excessively high stresses in the joints. The market for this type of equipment is currently undergoing rapid development due to increased demand for an increase in the quality of manufactured products. Today, they are increasingly replacing stationary coordinate measuring machines, particularly in conditions where mobility and speed are key conditions for process continuity.