Equation Driven Curve is creating a small gap how to get rid of this gap? 2 is over defining the sketch but 1.999 is creating a gap.

pi*10 should be the correct one but it gives over defined sketch. I reduce the number and tried.

Equation Driven Curve is creating a small gap how to get rid of this gap? 2 is over defining the sketch but 1.999 is creating a gap.

pi*10 should be the correct one but it gives over defined sketch. I reduce the number and tried.

Marcos,.. yes,..it's an approximation set with a tolerance on the curve(or entites) selected.

..question,.. assuming the equation is absolute,.. and,..the curve generated is created within the kernel tolerance/limits of Parasolid.....is the equation generated curve (parasolid) also a approximation? "yes/no"

Hi Maha,

Introducing Pi for the parameter 'T' and talking about trigonometry in radians, means that the equation is evaluated between between 0 and 360 degrees. This is 0 and 2Pi. If you go over 2Pi, the curve will repeat itself, meaning that it would passing from the same point twice. And this is no possible with these type of curves.

My recommendation was to do 2 equation driven curves, first evaluated between 0 and 180 degrees (0-Pi) and second between 180 and 360 (Pi to 2Pi).

So when merging using composite curves, both points will merge because are the same.

Let me know if that works for you.

Cheers.

Thanks Marcos,.. appreciate that!

So,.. maybe it's more of a question of "Absolute/Perfect geometry" in the real world of... science or engineering?

..this Absolute Perfect Curve Driven by a Equation... can only remain perfect,.. by itself, used only within the SolidWorks (a vacuum if you will) or a *.sldprt... that is, if we export that perfect curve,.. it looses the link to the driven equation and perfection and will become a approximation/tolerance per the kernel (or other modeling kernel which imports it).

..now, in the above sweep example,.. when we introduce a circle normal to the end of this "perfect curve",.. and apply a Sweep Feature (in this case.. or any feature)... will the topology be perfect,..and/or, will it be perfect when we export it to X_T or STEP or IGES?

From my perspective,... using 3D tools or working within a realistic tolerance (approximation),.. you may begin with a absolute perfect curve. .but the subsequent feature processes would degrade the original perfect curve.. so.. if the intent is perfection (science).. is would be quickly lost with Solidworks features alone.. and later within manufacturing tolerance processes.

Marcos,.. I don't care about the points (or it being personal), it's not about right/wrong, for me, it's about options which create a design within tolerance... and, I appreciate your input,.. you got 1000 points.

Correctness (+/-?) = what are the tolerance differences between the two curves (Fit Spline and Composite Curve) and finally creating the two child Sweep features or the end result/goal?

Maha Nadarasa please give Marcos Farina or Roland Schwarz the correct answer.... because they are more "correcterist" (+/-0.0001mm?)

Hi Paul,

Thanks for the badge, my first one.

I've learnt new things from these forums. I think this is the most valuable thing. Maha had a problem and we gave 2 different options. His main issue was to understand the parametric equations when use trigonometry and the values of angles in radians.

Your answers weren't clear and resulted confusing. Nobody talked here about kernel, export, machinning, etc... Only you.

Actually I've just extended the answer of:

that was right.

I wrote 'correctest', meaning the most correct in a funny way. I knew was wrong.

Cheers.

Hi Maha,

The method is:

Then you can use a single perfectly mathematic close curve for your purposes.

Cheers.