Hi Steve,

> I did not mention anyone else, please show me where I did!

You said that the result generated "may be OK for hobby stuff" - however, the result that I posted would be ok for a lot of different purposes, like someone more focused on just quickly getting a model for rendering, or for some design like a piece of jewelry that does not have to be exactly tubular to a tight tolerance, or a ton of different things.

Your statement is basically placing all these other kinds of people's work as just "hobby stuff", even though what they are producing is actually a part of their real job, it's just different from your job.


Of course, I can certainly understand if MoI is not the right tool for your job, if you have specialized requirements then use specialized tools.



> Why did you post the example
> (http://moi3d.com/forum/index.php?webtag=MOI&msg=3575.4)
> I was replying to (and I though we where discussing), and then
> not post an example showing a good result with you method?

Well, there were various different parts to the discussion earlier in this thread, that particular one I was giving an example of how you can't actually have a completely even thickness tube that has a common miter-like joint between 2 pieces that are curving around all over in 3D.


> The first rail/profile posted can easily be done with the various
> CAD systems I use, even Rhino can give a good\usable result
> with 5 mouse clicks.

One that matches your definition of within tolerance and not the "oh-so-terrible" result from sweeping between angled profiles?

If so then by all means show it.

If you do a regular 1-rail sweep in Rhino it will produce this result:



If you enable the "Untrimmed miters" option, then it will produce this result:




Note from the slanted isoparms there, that this is a sweep between angled profile curves, which is the kind of result that you had earlier said was totally unacceptable.

Is it suddenly acceptable now?

- Michael

Hi Steve,

> I think overall that MoI is no good for my work,
> MoI output is not accurate enough and when the
> models are taken into the other packages I use there are many errors,

Just curious, what other packages do you use ?

I use NX6 at work and I have done various models in MoI with quite good results when importing into NX, we work to an accuracy of 0.005mm(0.0002") and 99% of the time the models from MoI pass the tolerance check amongst the other surface checks which do well most of the time, if a surface does fail it doesn't take much to fix.

I don't know how complex the models are that you are bringing in from MoI to your other packages but this model I made 2 years ago in V1 passed the tolerance check at 0.005mm, there were a couple tiny objects and a couple of self intersections which where caused by the fillets which took me no more than 5 minutes to fix.

I believe working below an accuracy of 0.005mm is impractical in the real world unless you're into nanotechnology which is an entirely different world altogether.

If your getting a lot of errors with your models maybe try another modeling technique, like, I found I get better results if I use basic curves and arcs where possible instead of a freeform curve where you don't know what degree it is or how many segments it has.

I actually purchased MoI for home use and truthfully, I didn't expect a super accurate solid modeler but in the end it has preformed better than my expectations, I can even say it does better in a lot of areas than some mainstream CAD modelers that cost 10 to 20 times more.

Cheers