Excess Z movement in 5 axis

[leo.castellon]

New to 5 axis programming. We have a gantry 5 axis mill, huge machine, 200" in x , 90" in Y and 60" in Z. I am trying to program these angled holes in the attached model. I am not using the post that came with our machine but this one is similar. How do set up the Z axis so that it isn't cutting all of that air?

Thanks for any help provided.

LeoC

[26-Taylor]

The program is cutting air because your top height is "Model Top". When the part (or spindle) is at an angle, the "Model Top" is the highest point on the part. Imagine the Titanic. Normally, the smoke stacks were at the "top" of the ship. However when she was sinking (at an angle), the smoke stacks were no longer "on top", the stern (rear) was. Hope that makes sense...🤔 

If you change your top height to "Selection" and select the top edge of your counter bore, the toolpath will cut far less air. Screen shots below. (I also changed your stepover to .3" to make it easier to see)

 

My 5 axis advice, ALWAYS give yourself more clearance than you think you need & ALWAYS take it slow (5% rapids + hand on feed-hold). 

Hope that helps.

[leo.castellon]

Thank you for the reply, I will try this technique on my part. This would sure save a lot of time.

LeoC