Hi! What Inventor release are you using? I just tried it on R2015 but I did not see the problem using the following equations.
r(t) = t
theta(t) = (t-500)*PI
500 <= t <= 504
Thanks!
Hmm. IMO, the result seems to depend on the document settings. Try this:
- Start a new IPT with Extras-> Document settings -> units -> Angle -> radiants
- Define now the equation like in the 1st picture. I think, you'll get the expected result
Go back to Document settings and change Angle to deg. Define the next EDC like below. I think, you don't want that.
Now change the 2nd equation like in the last picture. I think, that's your intented curve.
Walter
Walter Holzwarth
Best way for further discussions could be attaching your file.
Walter Holzwarth