You can not imagine a workpiece without technical drawing on paper or integrated in 3D model with Product and Manufacturing Information
Communication between designer and performer happens almost exclusively via above.

To ensure the quality of the workpiece, the designer makes use of measurements and size tolerances.
But these size tolerances are absolutely insufficient to guarantee the functionality of a workpiece.

In addition to the dimensioning and the necessary dimensional tolerances, the designer also uses other means to indicate which requirements a workpiece must meet. Among other things, the surface roughness will always be shown on the drawing.

Another and equally important requirement of a workpiece are the shape and position tolerances, in order to be able to tolerate the geomtrical deviations.

When an axle is measured at various locations with the aid of a caliper, this axle can perfectly meet the specified dimensions and size tolerances.
But this measure says nothing about the roundness and straightness of the shaft.
The designer will have to use shape and position tolerances.

Experience shows that shape and position tolerances deter many students and sometimes the teacher.

We have foresseen parts to be machined and integrated in school educative programs.

Training is foresseen in our “Train de Trainer” program.