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24-05-2018 #7
There are different schools... some prefer limit switches, some don't. Personally I would not run a CNC without limit switches to prevent unintentional runaway. On my 3D printer I only have home switches, and those work as limit switches for one end of the axis, but have no limit switches at the other. Now and then I make a mistake resulting in hitting the wrong end, and even with the weak NEMA17 motors it sounds pretty violent. I want my CNC to stop in a more controlled and less violent way so I have limit switches at both ends to prevent that. On the other hand, I don't use home switch on my CNC at all, since I always start from zero on the material I work with and I set the zero each time I need to.
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