Tapping Machine – EM50 [Out of Production]

! EM50 tapping machine is no longer being produced. However, after-sales service is guaranteed.

The Sources Line electromagnetic Tapping Machine is an instrument that generates normalized noise, used for the acoustic test of floors and slabs.

The EM50 looks like an overnight bag, for its dimensions and for the transport modality.
This Tapping Machine is entirely built with aluminum cut by laser machines, and it is supplied with a new and lightened frame, harder than the frames of the previous version built until the end of 2014. It weighs 12 kg.

A peculiarity that makes this Tapping Machine unique is the electromagnetic lifting system of the five hammers that guarantees an excellent precision of the fall timings, that no other system can reach, and it avoids the vibrations and the ground noise, things that are usually emanated by Tapping Machines with electromagnetic automation. We have recently supplied our acoustic source with a specific switch to select the charging tension, according to the network supply, 115 or 230 volts, so that it can be sold and used in the majority of the countries.

This instrument for the evaluation of spaces acoustic features has been projected and is completely built by Sources Line, situated in the low Po valley, in province of Modena.
The acoustic source EM50 is an excellent tool that laboratories, universities, engineers and competent technicians should have among their professional equipment.

The kit that Sources Line usually gives to its customers is composed of: EM50 Tapping Machine, Battery Pack (placed on the rear part of the machine, in its specific compartment), remote control to use the machine from distance, charging cable and padded shoulder transport bag. The factory can also supply, under request, a flight case, ideal for the air transports.

The electromagnetic system

What makes the EM50 Sources Line impact sound generator different from the other Tapping Machines on the market?

Sources Line chooses the electromagnetic system.

The electromagnetic Tapping Machine does not have mechanical parts and uses the action of a magnetic field generated by five solenoids to raise the hammers, keeping them perfectly in the middle of the track on which they move.

The three fundamental advantages which differ our Tapping Machine electromagnetic system from the others are the following:

1. Precision and high impact repeatability

The electromagnetic noise generator Tapping Machine, thanks to an electric circuit that establishes the impact frequency (10 Hz +/- 0.001 %), guarantees high stability of the number of impacts, excluding further rebounds consecutive to the first and fundamental one.

This technology, that provides a “soft” grab of the hammers (without vibrations) and an adjustable and pre-calibrated motion-end, determines a constant fall of heights of 40 mm, independently from the typology and the hardness of the tested floors.

2. It does not need any maintenance

Not having geared motor and mechanical parts in movement, such as belts and gears, the EM50 Tapping Machine has really low interferences generated by friction and vibration, causing an almost total absence of wear.

3. Measurements reliability

During the fall and raising phase, thanks to the “flotation” of the hammers provoked by the electromagnetic field in the track, the hammers have a reduced friction in every moment of their movement. In this way vibrations are not transmitted to the frame and to the floor; they could provoke interferences and (bottom) noise and therefore alter the tests values.