How to convert sketch into a face?

[eexpss]

I want revolve a face into a solid. As in https://www.freecadweb.org/wiki/Part_Revolve, I need a face not a sketch.

There has two Revolve function in Part and PartDesign (why has two revolve function?), one give me a tube, other give me an error. I had made a pad from the sketch, then revolve, also fail.

[bejant]

There has two Revolve function in Part and PartDesign (why has two revolve function?),

Part WB can create faces and shells, and so you can Revolve a line segment.
Part Design WB > Revolution can only create a single solid, or add on to an existing solid.

Internally FreeCAD tries to create a face from your Sketch014, then moves the face through the 3D space to create a solid. If FreeCAD can't create a face from your Sketch014 before creating the Revolution, the operation fails and you see that error message in your screen grab.

one give me a tube, other give me an error

You probably have overlapping geometry in Sketch014, but you will need to upload your FreeCAD .fcstd file to the forum so that someone can look at it. If your complete file (document) is over the forum size limit, with that file open in FreeCAD you can create a new FreeCAD document (File > New), then copy Sketch014 into it, and upload the new FreeCAD document containing only Sketch014 instead.

[NormandC]

(why has two revolve function?)

Part tools can produce any kind of shape. For example, Part Revolve can produce surfaces.

PartDesign tools only produce solids. PartDesign is a higher level workbench based on Part. It has more advanced tools like Pocket and transformation features.

one give me a tube

Have you checked the "Make solid" option?

I had made a pad from the sketch, then revolve, also fail.

The error is self-explanatory. The profile cannot cross the revolution axis. Where is the vertical sketch axis located?

This would be much simpler if you provided your FreeCAD file, as explained in the Forum rules at the top of this forum.

[eexpss]

I had copy relate part in the attach file.

I checked the "Make solid" option.

What is a face? sketch not a face. Pad not a face.

ps: I know it now. only one sketch can revolve. Here is two circle in Sketch014.

[NormandC]

Without your file I wouldn't have been able to guess what was wrong.

You have two different circles in your sketch. You can only have one. The Part Revolve tool should be able to generate two solids like Part Extrude would, I believe it's a bug that it does not.

As for PartDesign, it can only create a single solid. This is a design choice. So you can only have one closed profile, or one closed profile with one or many other closed profiles inside it.

In any case there is a more efficient method than doing two profiles at the same time. You can use Draft Array in polar mode to repeat a single revolution as many times as needed.

[eexpss]

Yes. But Array is hard to understand. I test many times, finally get it.