Helix entry on surface toolpaths

[g huns]

I tried using surface-finish-contour on a trode last night, and selected the helix option. Backplot and verify looked good. Ran the path and as it got to about 3/4 of the way down it gouged the sh!t out of my part. Never used this in Ver. 9 so I'm wonderin if it's a post conversion issue or if I should just avoid using it.

[Müřlıń®]

I use it all the time in 9 and never had a problem

 

Where is your zero set?

 

Try running it again and see if it errors in the same place. Might be a control helix error....

[g huns]

Zero is bottom of part. Don't get any errors. I was watching it go and where it picks to do the helix was just not good. Looked like the center point was right on the edge of a wall. It was only swingin a .025 radius and it looks like about a .012 deep gouge. I would think it knows to avoid drive surfaces when it does it's thing. I was using a solid and picked entire body, inside of boundary, absolute depth limits.

[Müřlıń®]

Run collision check.... I'll bet it will output points where the gouge is...

[Thad]

As Murlin said, did you verify it? Did verify show the gouges?

 

Thad

[HevyMetl]

I had issues in 9 depending on the geometry surrounding the area I was cutting. It always showed up in verify as a gouge. Just for saftey reasons I quit using it.

[Müřlıń®]

Sometimes converting helix entries from arcs to line movements, works better.

 

I always ramp in though unless I am cutting something round...

[g huns]

Could it have to do with the fact that I'm cutting an electrode and using -.003 stock on all my drive surfaces? Verify was good, saved stl file of -.003 trode, ran collision check and came up none.

[Müřlıń®]

If you already had a -.003 model, why didn't you just cut it with 0 stock?

 

I don't like using - stock

 

I just Offset/surfs........is very fast and works flawlessly for me...

[Hacsta]

hey guys i had the same thing happen on a 2D radial slot. i did standard pocket with helix entry and it gouged my part all the way through.

 

the gouge didn't show up in backplot or verify.

 

i also had this happen in circle mill when i picked geometry not point.

 

machine master g is steamin

[g huns]

quote:

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If you already had a -.003 model, why didn't you just cut it with 0 stock?

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I ran a path in verify w/no helix, saved stl. Turned on helix, regen and verify. No gouges. Never used offset surfs before, have to give it a try.

[tooljockey]

When machining trodes here we control our overburn in the tool size.

 

example; 1/4" ball = .238 ball for .006 p/s overburn.

[Müřlıń®]

Lieing about the tool will work pretty good as long as the distance is not too great, I do it all the time.

 

The fillets are slightly out..... sometimes you will run into a clearance problem...

 

I do alot of impression work where preforms need to vary in size and depths from the finished part. Using offset surfs, I can grab some of the surfs and translate them down to obtain corret depths. Nuther reason surfs rulz for what I am doing

 

[ 10-03-2005, 11:13 AM: Message edited by: Murlin ]

[tooljockey]

Murlin, it sounds like you make "forging dies".

(roller, buster, blocker, finisher)

[chip]

I agree with the tool offset dia. Using offset surfaces. You should use caution. If your electrode has both an i.d. and an o.d. that needs to be accomplished.

[Müřlıń®]

quote:

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Murlin, it sounds like you make "forging dies".

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Yepper dude