Helman (Taneytown, Md., USA), which provides a range of tensioner systems for use in composites fabrication, has announced the launch of its next-generation digital electronic control. Now users can independently control tension in up to four different fiber types simultaneously. Precise filament tension can be controlled from as low as 0.1 lb to 44 lb (50g to 20,000g), all at pay-out speeds as fast as 500 ft/min (152 m/min). Operators can interface with the tensioner through an HMI or directly through the built-in Ethernet web page, which provides access to diagnostics features and parameter settings. Other features include cascading PID loops on tension control; a zero crossing tool that allows the use of more aggressive PID loop parameters for better tension control while automatically taming oscillations when in static pull; automatic dynamic braking of the motor for faster stopping at fault occurrence; and better layout of the components and tracks in order to minimize crosstalk and noise that can be found on analog circuits.
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