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Servo press module equipped with wireless telemetry for clean rooms

Servo press module equipped with wireless telemetry for clean rooms Many medical consumables need to be manufactured under ISO standard cleanroom conditions, but assembly in cleanroom environments makes stringent requirements of automation equipment. The first challenge is to operate without risk of contaminating the environment.

In addition, many processes are characterised by press-fit operations with particularly small joining forces or test operations that are especially sensitive, requiring high accuracy and controlled dynamic characteristics.

Kistler has addressed these requirements with the new Type 2157B NCFT electromechanical servo press module, designed to be suitable for use in cleanrooms to ISO standard and featuring wireless telemetry of the force signal.

The compact mechanism, integral piezoelectric force monitoring in the ram and two predefined measuring ranges from 0.05 kN to 1.5 kN make the new modules ideal for use in assembly and joining processes monitored by force-vs-displacement.  Advantages include easy selection of the ideal measuring range, a high overload factor and modest user spare parts inventory. Complex drive profiles with a maximum speed of 400 mm/s and displacement repeatability of 0.002 mm can be achieved.

As standard the Type 2157B NCFT meets the stringent cleanroom requirements defined by ISO 14644-1 Class 8, and Class 7 conditions can be met with just minor modification. In addition, because Kistler has equipped the new servo press module with wireless telemetry of the force signal, the Type 2157B NCFT can provide ultra-high precision measurement of extremely small forces directly on the tool holder under actual process conditions, without the need to mount a sensor on the ram. This eliminates the possibility of the measurement signal being impaired by dynamic characteristics of masses or moving cables.

Typical applications for the Type 2157B NCFT electromechanical servo press module include the assembly and test of medical products such as inhalers. The new NCFT augments the range of NC servo press systems from Kistler. Five series now provide seamless coverage of measuring ranges from 0.05 to 600 kN. They are available not only as a system subassembly but also as complete manual workstations for development, prototyping or small-batch production.

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