Bi-directional CNC machining - GIF

Bi-directional CNC machining.

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Previously:

5-Axis CNC milling aluminum - GIF
CNC bandsaw - GIF
CNC grinding a medical drill bit - GIF
CNC laser welder - GIF
CNC lathe in action - GIF

You can do it. It's fine. A little bit more tool wear and a little bit more heat, but it's alright. Just make sure you use climb milling for the finishing pass to improve the surface finish and reduce chip welding.
It's just a checkbox in Fusion if you want to mill both ways.

I usually mill both ways on my manual mill. I have it tuned up so it's tight as a drum so it can mill in either direction. Normally you should shy away from climb milling on a manual mill. If there's slop in your table you'll break end mills and ruin parts. It's surprisingly little work to tune up a mill. I don't know why people run their gear with slop in the x and y axes.