Still breaking things :( - I hope I am learning :)

I almost always "cut air" above the part for the first run. I've saved many end mills that way and avoided many clamp/vise hits. I usually run with a laser pointer mounted and I can watch the path better. It does not help with:

Migrating parallels that get zonked half way through the run.
Missed that there were hardened set-screws inside a part.
Improperly tightened vise.
End mill slowly pulled out.
The XY table that grazed a part that fell over and knocked over the computer that ran the show.

Ask me how I know.
 
RJSakowski said:
I have used a piece of 1/4" Delrin rod set about .5" high when I air cut. The Delrin will deflect if it runs into an immovable object.
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Thank you all. Very interesting. I am glad to know there are combinations I have not tried yet. :)
 
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