Basic trials were conducted to produce direct-effect charts for specific energy, roughness, roundness, size, and G-ratio. Many factors were varied including wheel speed, workspeed, dwell period, dresser speed, dressing direction, dressing overlap ratio, and dressing depth. Two levels were chosen for each variable. The levels were selected based on experience to give a reasonable span of the operational range. The two-level experiment leads to “direct-effects” charts.
19.10.7.1 Stage 2. Select Best Conditions and Confirm
Best conditions were selected for each grinding wheel by selecting a combination of values from consideration of the effects of each variable on production rate and quality from the direct-effect
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charts produced in the basic trials. A combination of values was selected to achieve the quality levels with shortest cycle time. The optimized conditions were validated by confirmation trials.