Testing machines for paper materials - Zwick - #9

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9 zwicki-Line ProLine Allround-Line 0,01 0,1 1 10 100 1000 10000 Fig. 1: Range of application of Zwick Roell materials testing machines Force in Newtons All Table-top testing machines can be equipped with a pedestal to position the workspace at the optimal height for the application or operater. This allows comfortably seated operation with sufficient legroom so that the system is also suited for wheelchair users. The Floor testing machines achieve a high accuracy from hard chromium-plated guide columns and a precision ball-type linear drive with play-free spindle nuts. Zwick offers different variations on the crosshead installation, so that either an upper, a lower or both workspaces can be available. All load frames with electromechanical drives can optionally be equipped with a second workspace which, for example, makes it possible to quickly change the type of test without having to convert the machine. Drives Electromechanical Drives All electromechanical drives are based on play-free and low-wear ball-type linear drives and digitally controlled drives. They are equipped with load frames for test loads up to 600 kN. Combined with digital measurement and control systems, they offer the following advantages: • Extremely large, infinitely variable speed range • Very low speed settings possible (from about 0.5 ìm/min up) • Highly precise and exactly reproducible positioning The ProLine testing machines with Standard Electronics assemblies as well as those of the zwicki-Line are equipped with cost-efficient DC drives, all other testing machines are equipped with especially low inertia, brushless AC drives. Functional tests on components (boxes, cores, palettes) Crush tests (corrugated board) Crush tests (paper) Tensile tests (wet) 2-Point-Flexural tests (Paper, board) Tensile tests (dry) 4-Point-Flexural tests (corrugated board)