how to find the center of a circle resulted from a sweep cut
how to find the center of a circle resulted from a sweep cut
(OP)
NX 8.5
after the sweep , i want to find the center of the circle in the last sketch (picture), and that center will be used as my reference for other feature, how to proceed?
thank you :)
pic
http://files.engineering.com/getfile.aspx?folder=5...
prt
tp://files.engineering.com/getfile.aspx?folder=0a6bf0f2-3835-484d-bea9-293dcf502b57&file=how_to_find_center_of_a_circle.prt
after the sweep , i want to find the center of the circle in the last sketch (picture), and that center will be used as my reference for other feature, how to proceed?
thank you :)
pic
http://files.engineering.com/getfile.aspx?folder=5...
prt
tp://files.engineering.com/getfile.aspx?folder=0a6bf0f2-3835-484d-bea9-293dcf502b57&file=how_to_find_center_of_a_circle.prt





RE: how to find the center of a circle resulted from a sweep cut
Analysis -> Advanced Mass Properties -> Area Using Curves...
...and select the 'Boundary (Temporary)' item, then select the edge curve of the opening, hit OK, accept the default tolerance, select the 'Create Centroid/Axes' item, toggle ON the 'Model Centroid' option and hit OK and then 'Cancel'. After refreshing your display you should find a point object at the 'center' of your opening which you can query to find the coordinates of or which can be used to dimension the location. Note that the point created is NOT associative to the opening so if the model changes you will need to repeat this procedure to get the correct point.
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.
RE: how to find the center of a circle resulted from a sweep cut
after posting the question, i tried again and again, and find a way but dont know if it is good.
since associativity is VREY IMPORTANT in my model, i am very careful in term of building sketch and assign dimension. here is what i did:
1. use project curve to get the "circle"(it's already in spline i know)
2. radonly add 3 three point on the "circle"
3.draw a sketch using 3 point method.
4. all done!
if i change the dimension of the cirle in the very insitl sketch, the geometry will be updated as well
good or bad?
prt
http://files.engineering.com/getfile.aspx?folder=1...
RE: how to find the center of a circle resulted from a sweep cut
Insert -> Curve -> Lines and Arcs -> Circle Point-Point-Point...
...and with 'Assocative' ON (you can toggle it ON/OFF at the top of the list of 'Lines and Arcs' that you'll see during the last step above) and your 'Snap Point' set to 'Point on Curve', select your three roughly evenly-spaced 'points' around the opening and now you'll have an associative arc that you can create an associative point at the center of.
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.
RE: how to find the center of a circle resulted from a sweep cut
www.nxjournaling.com
RE: how to find the center of a circle resulted from a sweep cut
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.
RE: how to find the center of a circle resulted from a sweep cut
RE: how to find the center of a circle resulted from a sweep cut
I believe my alternative method would/could account for those variables as well, could it not?
www.nxjournaling.com
RE: how to find the center of a circle resulted from a sweep cut
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.
RE: how to find the center of a circle resulted from a sweep cut
The "area using curves" method is unassociative. The "three point arc" method is an approximation (albeit a good one) that should be associative; but in my experience, I wouldn't be surprised if it errored on large input changes. If this is going to be used as a seed file (as the other threads seem to indicate), I'd go with the most robust solution.
www.nxjournaling.com
RE: how to find the center of a circle resulted from a sweep cut
the helix calculation is actually a strategy i used to determine how much angle does the circle rotate after a certain distance, but i never realized your method can be used to locate the center...
anyway, thanks for making my model robust!