Originally Posted by
rewster
My mill has started to do something quarky. When milling a 2.5d profile, the curves are coming out faceted instead of smooth. I've run these same parts many times before and never had this problem. I initially thought it must be due to the backlash settings, but they checked out ok. Any ideas?
x2, g540.
Thanks in advance for any advice.
-drew
Check the G-Code. If it's not doing arcs and is instead generating piles of small straight segments around a curve then the it's the CAM or CAD that's causing it. I had several drawings that for some reason converted to DXF as just that (a polygon approximation) and the CAM package did exactly what it was told. I had to use the CAM drawing tools to replace the high-segment-count polygons to real circles and arcs. Also some CAM packages will have a post processor that doesn't use arcs so it forces the output to be the polygon approximation.
CNC: Making incorrect parts and breaking stuff, faster and with greater precision.