After dealing with bobble with analog overrides and erratic spindle speed displays I created a hal component to filter, add hysteresis and do rounding. The results are excellent! I set my analog feed override to provide nice crisp 5% increments. Also my spindle speed bounces around making it difficult to read. Now the display shows nice 50 rpm steps. All very stable with no bobble. I put it to use on all three of my LinuxCNC machines with great results and thought that I should pass it on to the community.
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