Gradual deformation by indentation - automatic operation

Procedure:

• Insert the test panel into the C-opening of the instrument
• Clamp in the sample firmly
• Start cupping and simultaneously observe the process through the stereo-microscope
• Apparatus presses the cap of the spherical punch into the test panel at a uniform speed (0.2 mm/s)
• As soon as the first cracking is visible, stop the movement of the punch
• Read the cupping depth on the digital display and reset the punch
• Always carry out 3 tests for each sample