How to change radius of multiple circles in a sketch at once 1

[JoachimAlly]

Hi all,

Does someone know if there is a way to use like a reference as 'radius R of a circle' and setting the radius of 30 circles in a sketch to this parameter? It would be nice if I could change the radius of all the circles at once by changing this parameter R. For example by changing the R from 1.15 mm to 1.195 and immediately see that the circles all have this new radius.

I did a screenshot of the situation to clarify my question.

Kind regards,
Joachim

 

[NutAce]

Basic Sketch functionality.
Use the Equal radius constraint....select all circles -> equal radius

Ronald van den Broek
Application Specialist
Winterthur Gas & Diesel Ltd
NX8.5.3 / TC9.1.2
HPZ420 Intel(R) Xeon(R) CPU E5-1620 0 @ 3.60GHz, 32 Gb Win7 64B
Nvidea Quadro4000 2048MB DDR5
HP EliteBook 8570W Intel(R) Core(TM) I7-3740QM CPU @ 2.70GHz, 16Gb Win7 64B

 

[phillpd]

Can't you use the equal radius constraint ?

Or maybe just create the one circle, then use Pattern feature ?

NX 9.0.3.4
NX 10 (Testing)
Windows 7 64 (Windows 8.1 Tablet)

 

[JoachimAlly]

Hi,

Yeah that's a good idea. But I don't know why it is not working. I removed all previous contrains of the circles and then tried to constrain them to equal radius. But when I click on equal radius I can't select any circle. And also if I first preselect them and click on circle it is not possible.

Kind regards,
Joachim

 

[NutAce]

Can't tell much just from the picture... can you upload the actual part?

Ronald van den Broek
Application Specialist
Winterthur Gas & Diesel Ltd
NX8.5.3 / TC9.1.2
HPZ420 Intel(R) Xeon(R) CPU E5-1620 0 @ 3.60GHz, 32 Gb Win7 64B
Nvidea Quadro4000 2048MB DDR5
HP EliteBook 8570W Intel(R) Core(TM) I7-3740QM CPU @ 2.70GHz, 16Gb Win7 64B

 

[Xwheelguy]

You don't select the circles nor the geometric constraint to change the value. You edit the dimensional constraint (dimension value) that you assign to ONE circle that will control the radius value for the other circles. You will have to do this for each radius value unless you use a formula in place of the expression value.

For example, in your last image, I see mainly a group of small semi-circles/arcs surrounded by a larger full circle. The full circles will all have equal radius constraints, then apply the same equal radius to all semi-circles/arcs. Now apply a dimensional constraint (dimension) for the full circles (radius or diameter). Make note of the expression value (pXX=1.5 if the radius/diameter of the larger circles is to be 1.5). If all the semi-circles are the same radius/diameter (let's say 0.5 and expression is pYY=0.5), you can drive them by making their expression value a formula by subtracting the difference between the larger circle and smaller circle (pYY=PXX-1.0). Then you only have to change a SINGLE dimensional constraint.

Hope this isn't confusing.

Tim Flater
NX Designer
NX 9.0.2.5 Win7 Pro x64 SP1
Intel Xeon 2.53 GHz 6GB RAM
NVIDIA Quadro 4000 2GB

 

[JohnRBaker]

Are you sure those are ever 'circles'? They look like 'ellipses' to me.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:

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

 

[jerry1423]

You can make the expressions equal to each other,
for example if:
p23 = 5.0 and
p145 = 5.0
to make them equal to each other, in the expression editor (tools -> expression) you can make
p145 = p23

 

[SDETERS]

We had this same issue not to long ago. Set your first circle to the correct value. Then select all of the other circles (Not using the constraints dialogue box) after you have selected all of the circles on the last circle you select there will be a shortcut menu pop up. Hit the equal radius constraint that is on the shortcut bar. Assume you are using NX8.5

 

[JohnRBaker]

Everyone seems to be missing the point here...

The picture that the OP posted is showing a sketch which is made of 'Ellipses' and NOT 'Circles'. As I've shown below (and in the attached image file) the object on the Left is what an unconstrained 'Ellipse' looks like while the object on the Right is a 'Cricle':

The reason that you CANNOT select your 'circles' while attempting to constrain them to be equal radius, IS BECASUE THEY ARE NOT CIRCLES!!!!!

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:

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

 

[cowski]

We would have got 'round to it eventually...