making a helical half sphere ?
making a helical half sphere ?
(OP)
I'm trying to make a design out of helical wrapped wire that makes a cylinder and the ends in a half sphere. I;m not sure how to apply the law curve function to do that. NX 7.5
see attached picture and UG file
thanks
see attached picture and UG file
thanks





RE: making a helical half sphere ?
RE: making a helical half sphere ?
Do a revolve, in sheet mode, to create your half sphere.
Then project the spiral on this surface upon the Z axis.
RE: making a helical half sphere ?
RE: making a helical half sphere ?
Frank Swinkels
RE: making a helical half sphere ?
I wonder what happens to the Tube when you assign the Turns expression a value of 11.8 or 12?
NXHerbie
NX7.5.3.3
RE: making a helical half sphere ?
RE: making a helical half sphere ?
Edit the tube parameters and use the "multiple segments" output option for this case.
www.nxjournaling.com
RE: making a helical half sphere ?
To add to the last turn change the PitchAngle expression to be 90/(floor(turns)+1). Then you can set turns to say 10.5 etc. There will still be a limit to get a valid tube in the last turn.
Frank Swinkels
RE: making a helical half sphere ?
Frank's approach results in a uniform spacing along the face of the sphere.
Attached is a third approach approach that results in a constant pitch along the z axis and controls the helix radius with a set of law curves.