Create two pads on the side of a cylinder

[meme2704]

The tank will be made out of 50mm thick PP sheets.

I am a little skeptical about the mechanical strength of this tanck
you have to be a super specialist to weld PP

[NormandC]

Well, it is a 4m3 water tank (under the earth surface), but I'm not quite sure the guy well understood my requirements over the phone.
So I want to draw it.

The way you're doing is fine then, it's to give general dimensions and the fabricator will go into the details himself.

now I'm deep in techdraw tutorials,
my front/left/right views are all rotated in space, so each view looks like a perspective view.

In v0.18, view creation was changed in TechDraw. The view orientation is taken from the orientation in the 3D space. So to generate a top view in TechDraw, you first need to set the top view in the 3D space. It may be possible to change the orientation of the base (principal) view from its properties, but I haven't tried.

[arcol]

The view orientation is taken from the orientation in the 3D space.

Yepp, that was the key issue.

I'm almost done, only the incoming pipe is missing. I can not create it with the sweep tool, freecad just hangs.
Here is the freecad file:

water_tank_wip3.FCStd

(468.31 KiB) Downloaded 68 times

Here is a screenshot about the problematic part:

water_tank_incoming_pipe_todo2.png (9.73 KiB) Viewed 2134 times

[chrisb]

On loading your file I get already lots of errors:

Code: Select all

App::Document::_RecomputeFeature(): Unknown exception in Feature "ProjItem" thrown
App::Document::_RecomputeFeature(): Unknown exception in Feature "ProjItem004" thrown
App::Document::_RecomputeFeature(): Unknown exception in Feature "ProjItem005" thrown
App::Document::_RecomputeFeature(): Unknown exception in Feature "ProjItem" thrown
App::Document::_RecomputeFeature(): Unknown exception in Feature "ProjItem004" thrown
App::Document::_RecomputeFeature(): Unknown exception in Feature "ProjItem005" thrown
Gui::Command::activated(0): Unknown C++ exception thrown

If I delete Page the errors vanish.

If I then try to open Sketch008, I get an error message saying that there is a problem with external references. This means you have changed something in an earlier step and the construction of your model is not robust. With the Sketch validation tool I can remove these references, but looking at them makes my FreeCAD crash. Someone should try this with a current daily.

[chrisb]

Finally the crashes vanished .

Your sweep has self intersections. Move the path to the side of the tube, change to round corner transition, and the sweep will succeed.

[chrisb]

If you change Sketch007 to two concentric circles you get the tube directly.

[arcol]

If you change Sketch007 to two concentric circles you get the tube directly.

If I change the 45 degree line to an arc then it succeeds too:

4m3_szennyviztarolo.png (16.31 KiB) Viewed 2106 times

Here is the final freecad file:

water_tank_wip3.FCStd

(469.62 KiB) Downloaded 169 times

[arcol]

The tank will be made out of 50mm thick PP sheets.

I am a little skeptical about the mechanical strength of this tanck
you have to be a super specialist to weld PP

Well, if you are interested, I can post you some photos, once it is manufactured, which is 6-8 weeks.

[kisolre]

Well, if you are interested, I can post you some photos, once it is manufactured, which is 6-8 weeks.

You could post the story here
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