The Vetterman drum and hexapod tumbler are two instruments used for fatiguing textile floor covering specimens and the production of changes in appearance in laboratory simulation of wear. Both instruments produce changes in appearance in all textile floor coverings due to changes in surface structure and colour produced by mechanical agencies.

Testing procedure

A steel ball or a hexapod with studs rolls randomly inside a rotating drum which is lined with the textile floor covering specimens.
After fatiguing, the change in appearance of the specimens is assessed in accordance with the applicable assessment standard.