Dimension arc lenght on sketch 1

[cubalibre000]

Hi,
how can I dimension the arc lenght in the sketch environment ?

Thank you

 

[eex23]

Hi,

directly it is not possible. I have used expresions for a few times. Just enter desirable arc length in the expressions, and using simple formulas of chord length does the trick.

http://www.mathopenref.com/arclength.html

 

[hudson888]

If it is a pure arc then you can apply an Arc Length dimension as shown in the attached.

If the Arc is a spline then you can't, but a radius dimension does work.

The contents of the attached drawing were a simple curve ARC in the upper view and a copy of the same arc as a spline in the lower view.



Best Regards

Hudson

www.jamb.com.au

Nil Desperandum illegitimi non carborundum

 

[cubalibre000]

hudson888,
I'm in sketch modeling not in drafting.
If it's possible in sketch modeling, what is it the procedure ?
It's a simple arc.

Thanks...

 

[eex23]

Hi again,

look at the attached prt file (nx4). in the modeling open expressions and enter any value of "radius" and "arc_l", and you will get desirable arc lenght of any fixed radius.

 

[JohnRBaker]

Whenever you ask a specific question about functionality PLEASE indicate what version of NX it is that you're running.

That being said, I'm assuming that you're using one of the more recent versions of NX (at least NX 5.0).

While we do not provide an explicit 'Arc Length' dimension in the Sketcher, we do have something called a 'Perimeter Dimension', which when applied to a single arc segment will, for all intents and purposes, provide you with a constraint for the 'length' of the arc segment. You will find this option as the last item under...

Insert -> Dimensions

Note that when you apply this 'dimension' to an arc that there will be NO on-screen dimension displayed, however an appropriate Expression will be created which you can then edit. Actually you can apply a 'Perimeter Dimension' to any continuous series of lines and arcs (sorry, Splines and Conics are not supported) which allows you to set-up some very interesting schemes for controlling the overall size and shape of a Sketch.

Anyway, give it a try and see if this fulfills your needs.

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

http://www.plmworld.org/museum/

To an Engineer, the glass is twice as big as it needs to be.

 

[cowski]

Depending on your situation, you might also be able to make use of the 'perimeter' dimension constraint.

 

[cowski]

John beat me to it.

 

[cubalibre000]

As has John mentiond, the 'Perimeter Dimension' is the only solution.

 

[cowski]

To be fair, I think eex23 has shown that it is not the only solution, but it may be the only built in solution.

 

[ewh]

"Absolutes" are seldom absolute (with the exception of backward compatibility;-)).

"Good to know you got shoes to wear when you find the floor." - [small]Robert Hunter[/small]