Wrong Alternate Units

[Cadmanto]

Has anyone seen this in 2013 before?  Where you have the dimension set to alternate units and the calculation is not right?  The 8" calculated correctly, but the 2-1/2" should be 64.

[mdavis22569]

Is the Inches set to a higher round off value vs the mm's ... so say it actually 61,0 mm but it's actually just shy of the 2 1/2 inches and it's more like 2 7/16 and it rounds up to even 1/8ths ...

[Cadmanto]

Mike,

That is a good thought, but the value is actually 2-1/2" in themodel.  So there is no rounding.

As you can see there is a difference in rounding between the inches to the mm.  But even with that said, 61 mm equates to 2.401 in.  That is quite a bit off given the model is exact.

[mdavis22569]

Oh I figured I was reaching for the 7/16th to a 1/2 .... but you are using 1/4" increments .. what does it show if you do 1/8th for giggles

[Curtis_Waguespack]

Hi Scott,

It looks like the Model Value is not exactly 2.5".

Could it be that your drawing dimension is catching a radius endpoint, or something similar?

p.s. I'll try and get back to you later today, re: iLogic/ERP

I hope this helps.
Best of luck to you in all of your Inventor pursuits,
Curtis
http://inventortrenches.blogspot.com

[mdavis22569 · Accepted solution]

it's the rounding to a 1/4 of an inch ... 53/128 is .414 ...it's rounding it up but it's 61 mms

[Cadmanto]

Thanks  Curtis.  I noticed that after I posted last.  Between that and what Mike said, that makes sense.  When I said it was exactly 2.5" I wasn't taking into account that the model into the assembly was giving a slight variance.

P.S.  Look forward to hearing back from you on the iLogic.  Thank you for that.

Mike, I see that now.  I adjusted the model such that is evens out.

After going through this excercise, really makes you wonder if there shouldn't be a setting or something that alerts the user of how far off the alternate dimension value really is.

Thank you for your assistance and pointing this out.

I created this idea.  http://forums.autodesk.com/t5/Inventor-IdeaStation/Alternate-Units-Difference-Alert/idi-p/5116120

[graemev]

I've already fired up a Kudo for that one.  Perhaps the warning could be made for substantial differences in soft conversions of the rounding values?

±1/4" >> ±1mm and vice versa.