Can someone explain to me which angle is missing / hard to get with TechDraw? I haven't understood it so far
The other dimensions are as expected if I'm correct?
Creating a sketch for building a light house made of wood
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Re: Creating a sketch for building a light house made of wood
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- Lighthouse FreeCAD 001_M4x.FCStd
- (37.86 KiB) Downloaded 24 times
Regards / Viele Grüße
Max
Max
- Shalmeneser
- Veteran
- Posts: 9547
- Joined: Wed Dec 23, 2020 12:04 am
- Location: Fr
Re: Creating a sketch for building a light house made of wood
Any angle on a face (0° here, should be the same).
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- Phare.PNG (66.34 KiB) Viewed 1143 times
Re: Creating a sketch for building a light house made of wood
I'm trying to measure the angle between this two planes / faces along the green edge.
Update:
I've tried with both
OS: Windows 10 Version 2009
Word size of FreeCAD: 64-bit
Version: 0.20.25391 (Git)
Build type: Release
Branch: master
Hash: eef30446aa32ae989d5025cabcd8c28093f6a801
Python version: 3.8.6+
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.0
Locale: German/Germany (de_DE)
and
OS: Windows 10 Version 2009
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24291 (Git)
Build type: Release
Branch: releases/FreeCAD-0-19
Hash: 7b5e18a0759de778b74d3a5c17eba9cb815035ac
Python version: 3.8.6+
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.0
Locale: German/Germany (de_DE)
Update 2:
attached "Lighthouse FreeCAD 002.FCStd"
For this I need a view perpendicular to the green edge, because the object itself is not a cuboid.
Using the manipulator Workbench it results in 112.28 degrees, or as inside the object 67.72 degrees.Update:
I've tried with both
OS: Windows 10 Version 2009
Word size of FreeCAD: 64-bit
Version: 0.20.25391 (Git)
Build type: Release
Branch: master
Hash: eef30446aa32ae989d5025cabcd8c28093f6a801
Python version: 3.8.6+
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.0
Locale: German/Germany (de_DE)
and
OS: Windows 10 Version 2009
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24291 (Git)
Build type: Release
Branch: releases/FreeCAD-0-19
Hash: 7b5e18a0759de778b74d3a5c17eba9cb815035ac
Python version: 3.8.6+
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.0
Locale: German/Germany (de_DE)
Update 2:
attached "Lighthouse FreeCAD 002.FCStd"
- Attachments
-
- Lighthouse FreeCAD 002.FCStd
- (33.4 KiB) Downloaded 19 times
- Shalmeneser
- Veteran
- Posts: 9547
- Joined: Wed Dec 23, 2020 12:04 am
- Location: Fr
Re: Creating a sketch for building a light house made of wood
center angle of an octogon : 360°/8 = 45°
isosceles triangle : (180°-45°)/2 = 67.5° 67.5°+67.5°+45°=180°
The angles at the bottom (or top) are 67.5° or 180°-67.5°=112.5°
It's possible to get those numbers in a 3D view (but TechDraw doesn't get it right confusing with acute/obtuse angles).
isosceles triangle : (180°-45°)/2 = 67.5° 67.5°+67.5°+45°=180°
The angles at the bottom (or top) are 67.5° or 180°-67.5°=112.5°
It's possible to get those numbers in a 3D view (but TechDraw doesn't get it right confusing with acute/obtuse angles).
- Attachments
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- Phare.PNG (38.62 KiB) Viewed 1088 times
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- Lighthouse FreeCAD 001_M4x(1).FCStd
- (35.94 KiB) Downloaded 21 times
Re: Creating a sketch for building a light house made of wood
Yes, as I said before, I can calculate them or meausre it using the Manipulator Workbench.
But nothing of this will let me create a technical drawing. So I need either a (simple) way to create additional views aligned to one plane and perpendicular to a selected line or something like a construction layer were I can use the "Align view to face" macro.
Fortunatelly FreeCAD now stores the used view in the Page object so it should be possible to use different views for one part.This is of course a special situation, but I don't think really unccommon. So I wonder if no one else has asked this question.
But nothing of this will let me create a technical drawing. So I need either a (simple) way to create additional views aligned to one plane and perpendicular to a selected line or something like a construction layer were I can use the "Align view to face" macro.
Fortunatelly FreeCAD now stores the used view in the Page object so it should be possible to use different views for one part.This is of course a special situation, but I don't think really unccommon. So I wonder if no one else has asked this question.
- papyblaise
- Veteran
- Posts: 7998
- Joined: Thu Jun 13, 2019 4:28 pm
- Location: France
Re: Creating a sketch for building a light house made of wood
Is it really necessary to cut the frog's hair in 4 like this?
for a mathematical truth perhaps
but in real life, especially in wood
but I concede that making a projection of cut (section) according to a desired plane would be a good
for a mathematical truth perhaps
but in real life, especially in wood
but I concede that making a projection of cut (section) according to a desired plane would be a good
Re: Creating a sketch for building a light house made of wood
At this step the error is very small, I agree. But I think I will get an other part (since I've build this project with Fusion) so the error might b much bigger.
Changing the Tower_height in the spreadsheet from 1000 to 200 will also change this angle. Now TechDraw and it's projection shows up with 67.31° while the correct angle is about 71.67° - a difference of about 4 degrees. If I build this in wood I 16 times (8 pieces with two edges) this difference which will result in a huge error.
In the "original" version with a tower height of about 1000 it would end up in about 6.5°...
And yes, before you ask, I know that I also will have to tilt my saw with a high precision which also will give me an additional error.
Changing the Tower_height in the spreadsheet from 1000 to 200 will also change this angle. Now TechDraw and it's projection shows up with 67.31° while the correct angle is about 71.67° - a difference of about 4 degrees. If I build this in wood I 16 times (8 pieces with two edges) this difference which will result in a huge error.
In the "original" version with a tower height of about 1000 it would end up in about 6.5°...
And yes, before you ask, I know that I also will have to tilt my saw with a high precision which also will give me an additional error.
Re: Creating a sketch for building a light house made of wood
I tried to recreate the Fusion 360 light house with FreeCAD from almost scratch.
I currently have still a problem with the roof and for the next step with the TechDraw as written in the previous comments.
But just to get an idea what I'm trying to build... Edit: updated the file with the last version, I forget to make the window size changeable using parameters.
I currently have still a problem with the roof and for the next step with the TechDraw as written in the previous comments.
But just to get an idea what I'm trying to build... Edit: updated the file with the last version, I forget to make the window size changeable using parameters.
- Attachments
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- Lighthouse FreeCAD 002.FCStd
- (146.6 KiB) Downloaded 20 times
Re: Creating a sketch for building a light house made of wood
So here is my current version of the light house.
I know it is not perfect, there are for sure some improvements and I have to learn a lot more.
But I got my object and implemented some points I wanted to have:
- use parameters so I can change the tower on the fly
- have the ability to check dimensions and angles using the Manipulator workbench, unfortunatelly I have not really a good progress with the TechDraw workbench and angles
- can "detach" the light house to parts I can build with wood
Thank you all for supporting.
I know it is not perfect, there are for sure some improvements and I have to learn a lot more.
But I got my object and implemented some points I wanted to have:
- use parameters so I can change the tower on the fly
- have the ability to check dimensions and angles using the Manipulator workbench, unfortunatelly I have not really a good progress with the TechDraw workbench and angles
- can "detach" the light house to parts I can build with wood
Thank you all for supporting.
- Attachments
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- Lighthouse FreeCAD 006.FCStd
- (176.64 KiB) Downloaded 17 times