Yeah my scroll saw would be very unhappy as a CNC. When I use the normal saw blades on 3/4 inch pine it bends the blade and doesn’t cut straight. It will not cut a straight line. It tries to curve to one side. I have to vary my blade speed and manual feedrate depending on wood rings and how it feels. The wood jumps up and it is hard to keep down. I cut a pine wood derby on it once and won’t try that again. I usually break a blade or two per project with that saw. But now I want to try it with a spiral cut blade.
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