Vericut showing violation of design while machining itself.

Kantha · 2005-05-20 13:26:01

I am thinking that it could be simple for vericut to cut the design solid in addition to the stock solid when machining. If anything getting cut in the design solid should be red in color. The cut tolerance would apply here. That way you would know any major violations in the design without going for auto-diff.

At this time, vericut does not sense violating the design if the feed is cut feed rate.

Kantha

vhubbard · 2005-08-30 16:16:47

Agreed. A Real time warning of gouging as an option.

Al_V · 2005-09-07 16:04:46

Vericut can do this,
Add a "design" component in the tree and add your model to it.
Then in >Setup >Machine >Settings >Collision Detect you can add Tool to Design with a near miss of 0.0.

You could also use your design part as stock and add a collision detect of Tool to Stock.

I think you need machine sim to do the above, but without machine sim you could set your fast feed to a near zero value, so Vericut would detect ANY tool to stock "collisions" as fast feed stock removal errors.

SergeV · 2005-09-07 20:34:20

Good news, in 6.0 it will be possible with AUTO-DIFF in the Constant Gouge Mode to detect a collision with the Design model during the simulation. The collision volume will show in red and the error will be reported in the log file. A tolerance can be applied to gouge detection.

See, it was simple... :wink:

vhubbard · 2005-09-27 13:07:01

This will be good as long as -0- works.
Currently when I set Tool to Design collision checking with a value of -0-, there are collision warnings when there was none, just cutting to -0-. It all depends on what -0- is after roundoff error.

The tolerance setting in 6.0 should handle this kind of problem, right?

Is there an option to turn gouge checking off for things like drill points and taps? Most design models are not made to this level of detail and "false" warnings can be distracting or hide real problems.

SergeV · 2005-09-29 17:31:52

Val,

With planar features, a zero tolerance could be achieved, but because the Design is a faceted model (STL), the triangles on any curved sections will deviate according to a cordal deviation. So in principal, you can do a collision check smaller than the design model tolerance but you might have some "noise" in areas with a large curvature like holes.

As for an option for drill points and taps, it gets a bit complicates as the drill or tap could have a collision outside of the hole. But it is worth considering for a future improvement.

vhubbard · 2005-09-29 18:16:50

SergeV wrote:

Val,
With planar features, a zero tolerance could be achieved, but because the Design is a faceted model (STL), the triangles on any curved sections will deviate according to a cordal deviation. So in principal, you can do a collision check smaller than the design model tolerance but you might have some "noise" in areas with a large curvature like holes.
...

I got constant error messages againts flat surfaces. That is why I believe it is a roundoff problem.

SergeV · 2005-09-29 21:55:24

We have seen roundoff problems with STL that were imported in aircraft coordinate system. There is a variation in the triangles that define planar surfaces. It is inherent to the STL format.

The mechanism for the constant gouge mode in 6.0 is completely different. The 5.4 method did not apply any tolerance during the simulation. It would produce a warning everywhere there was a potential violation of the Design surface regardless of its size. Afterward, the tolerance was applied only to the potential areas.

In 6.0 the tolerance is applied to every cut and should be more precise and should not produce the false hits observed previously.

Of course, if you send me an example, I can confirm it for your particular case.

VERICUT Users' Forum

#1 2005-05-20 13:26:01

Vericut showing violation of design while machining itself.

#2 2005-08-30 16:16:47

Re: Vericut showing violation of design while machining itself.

#3 2005-09-07 16:04:46

Re: Vericut showing violation of design while machining itself.

#4 2005-09-07 20:34:20

Re: Vericut showing violation of design while machining itself.

#5 2005-09-27 13:07:01

Re: Vericut showing violation of design while machining itself.

#6 2005-09-29 17:31:52

Re: Vericut showing violation of design while machining itself.

#7 2005-09-29 18:16:50

Re: Vericut showing violation of design while machining itself.

#8 2005-09-29 21:55:24

Re: Vericut showing violation of design while machining itself.

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