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does Mach3 and LinuxCNC do interpolation?

Posted: Tue Mar 19, 2019 6:11 pm
When mach3 and LinuxCNC send steps and direction signals to step driver, does they do interpolation?

When CAM generate G code, I suppose they do one layer at a time, in that one layer, all movement is in X and Y plane, so it can breakdown to straight line and curve.