equations round evaluated values to 6 decimal places

Hi,

I have computed angles in equations and linked the results to multple
feature drafts - due to the nature of the the draft it needs to run out
to system tolerance or in sw's case 8 decimal places. However, the
returned result from the equation is rounded to 6 decimal places
regardless of the unit settings (for degress or distance (both are set
to 8 in this part)).

Hence for any work requiring accuracy past 6 decimal places equations
cannot be used. Unless I've missed an option somewhere?

Zander

 

Can you use linked values instead of equations?

 

Yes - in fact that's what I did - I'm just surprised that equations
have this limitation - why wouldn't it use the same system tolerance as
everything else? My foggy memory remembers running into this same
issue last winter.

Thanks,

Zander

 

Now that you mention it, I o remember the same thing.

Are yousure the value is only evaluated to 6 places? Maybe it is
evaluated further but only displayed to 6 places. Many calculators are
like that.

If linked values were not sufficient, perhaps one could use a design
table.

 

It's definately rounded. A feature dim linked to the equated value and
set to 8 places will display the 6 place rounded value with 2 zeros
padding the end. In this case linked dims work fine - It's just that I
had setup the equations previously and then learned I could not use
them and maintain accuracy to the system tolerance.

 

Hi FlowerPot,

I should have explained more..., I'm simply computing a number with an
equation and then using the number (to 8 decimal) places to control a
sequence of drafts in the model. The equation editor has no knowledge
of my devious plans. I'm simply performing some math that results in
an answer the runs out to 8 decimal places. But it's rounding it to 6
- which introduces rounding errors in my part. Of course I don't
actually need the accuracy for manufacturing itself but rather to
eliminate rounding errors in my model.

Zander

 

Well, I thought it explained everything but here goes:

I'm evaluating a cosine to a value of .17226581 (when rounded to 8
decimal places). That's if I use a calculator. I have another part
where this slope is duplicated and I simply want the end diameters to
be equal. If I use an equation to evaluate the same number I get
..172266 which is the same answer rounded to 6 decimal places. All I
was saying was that the equation editor should at least respect
solidworks own internal system tolerance of 8 decimal places - seems
logical.

In the other part this slope is a driven value so I'm simply trying to
maintain consistancy.

Thanks,

Zander