The Structure of Hexapod Tumble Tester

The Hexapod Tumbler Tester is a popular apparatus used in the evaluation of the appearance retention of carpets.

Drum – constructed of Nylon or other like material and capped by a lid that is secured by a latching device. The drum and lid have a locating groove to hold the specimen backing sheet flat to the inner wall of the drum. A photograph of a typical drum is show in Photograph 1 and Photograph 2. The drum dimensions are:  

Internal Diameter: 12 ± 0.18 in. (302 ± 5mm)

Wall Thickness :0.3 in. approx. (8 mm approx.)

Internal Depth: 8.2 ± 0.2 in. (207 ± 5 mm) 

Driving System - cradles the drum on rollers and keeps the axis of the drum level, and rotates the drum at 35 ± 2 rpm (3.6 ± 0.2 rad/s). The driving direction reverses after approximately 500 revolutions.  After the 500 rotations the unit will stop and stand stationary for approximately 5 to 15 seconds, then begin rotating in the opposite direction. After 2000 rotations the unit will stop and wait for the operator to restart the unit.

Hexapod Tumbler – there are two types of Hexapod Tumblers: the 2.8 lb. (1270 g) or the 8.4 lb. (3810 g), as specified below. The selection of which depends on the end use of the pile floor covering1.

8.4 lb. Commercial Hexapod Tumbler – Comprised of a steel (or other suitable material) 2.0 ± 0.04 in (.50 ± 1 mm) cube with 1 inch (25 mm) thick places welded to each side. The outside corners are welded such that when the studs are fitted and the hexapod placed on a flat surface, no metal touches the flat surface. The total length of any axis, not including hexapod feet, should be 3.8 in ± 0.08 in (96 ± 2 mm). Replaceable tumbler feet are screwed centrally into each face. The specified total mass of Commercial Hexapod Tumbler with six feet installed is 8.4 ± 0.2 lb. (3810 ± 90 g). A photograph of a typical 8.4 lb. Commercial Hexapod Tumbler is shown in Photograph 3.

2.8 lb. Residential Hexapod Tumbler – Comprised of Aluminum (or other suitable material) 2.00 ± 0.04 inch (50 ± 1 mm) cube with 25 mm (1 inch) thick plates welded to each side. The outside corners are welded such that when the studs are fitted and the hexapod placed on a flat surface, no metal touches the flat surface. Alternatively, the ball may be milled from a solid block if the construction meets the specifications. The total length of any axis, not including hexapod studs, should be 3.8 inch ± 0.08 inch (96 ± 2 mm). Replaceable tumbler feet are screwed centrally in each face. The specified total mass of the Residential Hexapod Tumbler with six feet installed is 2.8 ± 0.13 lb. (1270 ± 60g). A photograph of a typical 2.8 lb. Residential Hexapod Tumbler is shown in Photograph 4.  

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