creating a dome in x2?

[ZipSnipe]

Ok I have a square block that I want to create a shallow dome on top of this block. In x2 I was able to create a sphere in the block but I can't figure out how to change the height of the sphere. I also noticed all the cool video tutorials are gone can anyone point me to some freebie tutorials?

[Superman]

Probably, the easiest method is to revolve a curve around a line ( axis )
this will give a surface, make sure that it extends further into or past your block to enable trimming surface to curve ( or surface to surface ),

Start off in the front or side view, and create a half section of an umbrella,
the arc is the item to revolve, the stem is the revolving axis.

[ZipSnipe]

Would I then contour milling operation?

[Mike Mattera]

You could also just draw the portion of the arc you need to machine and then do a Toolpath - Wireframe - Revolved. This actually might work in Mill level 1 (possible level 2). It's quick and easy. No need to create a surface.

The Wireframe toolpaths are the most overlooked and also the most useful for basic 3D shapes.

Mike Mattera

[Superman]

There is too many options to create the ideal toolpath

Size of block ?
How much rise of dome over the block ?
Material and stock amount ?
Machine specifics ( # of axes, memory size, available machining power, tooling, etc )

IMO
3 axis machine with low doming ( high dome - 1st, rough by "surface contour rough" spiral CW keeping tool on the part, also use rampl )
note! I'm using the basic Mcam strategies, there are others in HSM which are better, if you are familiar with them.

2 operations for roughing
rough the dome
"surface rough project" ( lines created above the part, from outside the block going to the high point of dome in a radial fashion )
rough the block
"2D contour" around the block perimeter ( depth cuts if required )

2 operations for finishing
finish the dome
"surface finish scallop" ( spiral path from outside the block going to the high point of dome )
finish the block
"2D contour" around the block perimeter ( depth cuts if required )

[ZipSnipe]

Ooh I have mill level3 and it won't let me contour a dome! I guess I'll figure out something else. Thanks guys

[Superman]

Contour ???

Are you wanting to do a 2D operation on a 3D feature ?

If you want to do Z level machining on a 3D feature, a 3D operation would be your choice, using only 3-axis

A 20" radius dome that has say 1/4" between highest to lowest level would need very shallow DOC using a "surface contour" strategy.

What strategy are you trying to use ?
Can you attach for others to suggest better methods ?