Rapid Collision with Stock Error

[mcobb]

Can anyone help me out or explain why I get a rapid collision with stock on the last toolpath "{T1} Pocket 1"?

https://a360.co/36fe5RS

Any help is greatly appreciated.

[Anonymous]

Your link is empty

[mcobb]

Is this any better?:

https://a360.co/2WK2Aim

I'm also attaching a screencast below, which should help to summarize my predicament.

Thanks for any help!

Mike

 

[johnswetz1982]

You are simulating individual operations. You need to select the setup and simulate that and see if you still have the errors. When you pick the paralell to simulate Fusion thinks that the previous operations have not been done/machined away, Therfore rapiding into stock that has not been removed (though it really has).

[Anonymous · Accepted solution]

Two crashes I see don't seem to have much impact, one in screen shot only shows tool kissing wall by .002 or so and the other is about .01 deep if I compare visually.

When I pull away slowly, I don't see any red marks on stock which suggests to me that collision is minor and would not result in tool breaking if you run file as is.

Two crashes in adaptive tool path seem to be result of lead in and lead out or tool retracting policy and maybe they can be avoided by fiddling with options in linking tab.

One thing I would change is using bull nose for roughing and finishing, resulting in smother transition between levels.

[mcobb]

Thanks so much for your help.  I'm not sure exactly how you were able to slow down the toolpath to the point you could show it just after the collision but that looks like a very helpful workflow.  I changed to a ballnose and, you are right, it looks much better.  My only concern is the length of my ballnose bit, which I'm not sure will entirely clear the model on my table.  I probably need to get a shorter ballnose.  Thanks again!

[Anonymous · Accepted solution]

You can slow down tool simulation by adjusting slide towards the middle, then at right moment press 
"pause", this freezes tool in desired position so you can zoom in and see what's going on.

You can also hold down left mouse button while mowing mouse in left and right direction, drawback is that when you let go, tool takes off at whatever speed you have on slider position at a time.