Search found 1194 matches

Go to advanced search

by hammax
Tue Aug 25, 2020 10:26 am
Forum: Help on using FreeCAD
Topic: GramoPhone Horn
Replies: 36
Views: 1260

Re: GramoPhone Horn

... a pure "handmade" tractrix horn.
(Remembering, long ago I made experiments with a die form for a pressure vessel input.)
There also exist some lists of coordinates and scripts/apps.

GramoTractrix.PNG
GramoTractrix.PNG (41.34 KiB) Viewed 143 times
by hammax
Sun Aug 23, 2020 6:31 am
Forum: Help on using FreeCAD
Topic: GramoPhone Horn
Replies: 36
Views: 1260

Re: GramoPhone Horn

... getting interest on this retro stuff, I had a look at some pictures. A gramophone horn has 3 parts: the exponential horn, fixed at the case (the design of the exponential function or of a tractrix could be of interest), https://en.wikipedia.org/wiki/Horn_loudspeaker#Exponential the middle pipe t...
by hammax
Sat Aug 22, 2020 1:00 pm
Forum: Help on using FreeCAD
Topic: create solid from 3 sketches
Replies: 8
Views: 404

Re: create solid from 3 sketches

... here is a graphical hint to the details: You have only one sketch => profile in the length direction and profile for the rounded front. The rounded front is cloned, to distort it by different axis scales. from the bottom of the length extrude and the scaled front you can get a facebinder. Extrud...
by hammax
Fri Aug 21, 2020 6:03 pm
Forum: Help on using FreeCAD
Topic: GramoPhone Horn
Replies: 36
Views: 1260

Re: GramoPhone Horn

... was GlouGlou's flowery grammophone-horn something like that?

GrammophoneH_2.PNG
GrammophoneH_2.PNG (50.8 KiB) Viewed 109 times
by hammax
Thu Aug 20, 2020 5:13 pm
Forum: Help on using FreeCAD
Topic: GramoPhone Horn
Replies: 36
Views: 1260

Re: GramoPhone Horn

... GlouGlou please split the file into pipe and flower
and provide it under Users Showcase!!!
by hammax
Thu Aug 20, 2020 5:06 pm
Forum: Help on using FreeCAD
Topic: Curves workbench
Replies: 828
Views: 85539

Re: Curves workbench

... if you didn't say solid but wall thickness 0,8mm you would have got this one:
Dear friends, please tell me how to convert gordon surface to solid?
example_2.PNG
example_2.PNG (45.52 KiB) Viewed 400 times
by hammax
Thu Aug 20, 2020 4:15 pm
Forum: Help on using FreeCAD
Topic: Curves workbench
Replies: 828
Views: 85539

Re: Curves workbench

... close the open areas with 1.
Then combine all 4 shapes to one shape with 2.
At last convert the resulting shape to a solid with 2.
Beware that's no more parametric.
example_1.PNG
example_1.PNG (65.98 KiB) Viewed 325 times
by hammax
Thu Aug 20, 2020 8:02 am
Forum: Help on using FreeCAD
Topic: GramoPhone Horn
Replies: 36
Views: 1260

Re: GramoPhone Horn

... you need points on the sweep path to make sketches of the local cross sections. Because it is still not possible to place points visual outside sketcher on the BSpline, there is a workaround in CurvesWB by SplitCurve tool. https://forum.freecadweb.org/viewtopic.php?f=8&t=22675&start=700#p420762 ...
by hammax
Tue Aug 18, 2020 6:46 am
Forum: Help on using FreeCAD
Topic: Help in designing an Archimedes Wind Turbine
Replies: 14
Views: 1218

Re: Help in designing an Archimedes Wind Turbine

... I did some further trials to understand the design principle of this "windmill" type. Coming from the old Ressel ship propeller as a surface between two helices, there is the possibility to round the cross section of the blades to concave or convex only by scaling the inner helix and place it up...
by hammax
Mon Aug 17, 2020 9:49 am
Forum: Forum in Deutsch
Topic: [gelöst]Helix einer Bahn Folgen
Replies: 3
Views: 371

Re: Helix einer Bahn Folgen

... nicht einer Bahn folgend, sondern Helix-Segment gleich so gestalten, dass man ein polares Array draus machen kann.

RoundHelix.PNG
RoundHelix.PNG (94.18 KiB) Viewed 346 times

Go to advanced search