Case story – ballbar and laser calibration H-3000-1137-01 Haas Automation Inc. used to fine-tune every one of its VF vertical machining centres through a mechanical fore-and-aft loading test, with results entered into the CNC as a compensation value. Recently however, the company began to supplement this test with backlash compensation using Renishaw’s QC10 Ballbar System. By measuring position errors throughout a complete circle, the Ballbar iso

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