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Automatic Part Verification Through Reference Comparison
8/18/2009 Modern Machine Shop

VIDEO. The machining center in this automated production process inspects its own work and updates its own positioning. Probing a known, traceable reference makes this possible.

Accuracy Gain From Linear Encoders
1/15/2009 Modern Machine Shop

If the position of a machine tool’s axis is measured using a rotary encoder, then potentially the ballscrew is being asked to perform two contradictory functions. The ballscrew both drives the axis into position and indicates that position—because the ballscrew lies in between the encoder and the moving element of the machine. Control technology supplier Heidenhain calls this “semiclosed-loop” operation.

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