REGION

Increasing the Operability

of Machinery for Thirty Years

dif s.r.o., a company from Bohumín, established in 1990, is happily celebrating its thirtieth anniversary

this year. The motto of the company is, “No more breakdowns!” The company performs diagnostics

and analyses of the technical conditions of machinery. They carry out optical measurements and

vibration monitoring, especially in the operations of production plants. They focus on the installation

of diagnostic on-line systems and do machinery repairs.

“As doctors use an electrocardiograph to identify and

diagnose abnormalities of a heart, we use our diagnostic

instruments to analyse the condition of a machine.

They tell us if a fan is well-balanced, or if the problem is

a damaged bearing,” says ing. Radim Falc, CEO of the

company.

dif works in the paper, automotive, energy, and

engineering industries. Diagnostic on-line systems

installed by dif are used by car producers Škoda Auto

and T.P.C.A. Kolín. Other happy clients include ABB,

Mondi paper mill, Smurfit Kappa, and OKD. dif teams

also serve business partners in Slovakia, Poland,

Romania, and Russia. dif experts installed the guides for

robotic movement in Belgium, a glass-fabric production

machinery in Mexico, and measured the production line

in a factory producing airplane wing fibres in Atlanta,

Georgia, USA.

Text:

redakce,

Radka Legerska

Foto:

www.skoda

-storyboard.com

archiv dif

www.dif.cz

High-tech Equipment and Skills Solve Challenging

Situations

Optical measuring and setting up machinery is

performed by combining techniques using laser tools

and geotechnical surveying apparatuses. Cutting-edge

instruments, customized equipment, the company’s

own measuring methods, and the experience of the

technicians guarantee top precision in measuring,

68 ǀ POSITIV 3/2020

which is absolutely vital in machinery and engineering

production. The measuring tolerance of a laser tool is up

to ±0,01 mm; the precision measurement station Leica

TDRA6000 measures with a tolerance of ±0,25 mm at

a distance of thirty metres. These precision parameters

convinced Hansen Electric, the contractor servicing

the generators of the Swedish water power plant

Ängabäck, near the town of Markaryds, that dif is the

right company to perform control measurements in

their power plant.

Diagnosticians from Bohumín Measured Generators

of Swedish Power Plant

A medium-sized water power plant from 1952 is part

of a scheme of power plants on the Lagan River. The

seven-metre waterfall drives two Kaplan turbines which

annually produce 28 GWh. In 2019 and 2020, Strojírny

Brno performed repairs on the turbines, and Hansen

Electric of Opava serviced both generators.

Before and after repairs, dif diagnosticians checked the

stator and rotor geometry, and measured the air gap in

between. The check was to diagnose the deformities of

these parts of the turbine which might have developed

over the seventy years of the power plant’s operation.

“Evaluating all the values in the process, we chose

a geodetic method of measurement using our precision