newby needs help

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rosen71
Posts: 7
Joined: Wed Oct 21, 2020 7:34 am

newby needs help

Post by rosen71 » Wed Oct 21, 2020 7:43 am

Hi there,

As completely new to FreeCad, I am learning the first steps thru all available tutorials, but got stuck with an issue I couldn't resolve.
Here is the situation:

I draw (Psrt Design) two figures. Let's say 2 squares with different sizes.
What I need is to put the smaller square, rotated at 45o angle, in the center of the larger square.
The socind isuue is how I can make the corners of the square to be round (with 3mm radius).

Your help will be highly appreaciated :)
test_1.jpg
test_1.jpg (464.19 KiB) Viewed 238 times
chrisb
Posts: 28855
Joined: Tue Mar 17, 2015 9:14 am

Re: newby needs help

Post by chrisb » Wed Oct 21, 2020 8:42 am

For the square: You can switch the inner square to construction lines and place the corners in the middle of the construction lines using symmetry. Perhaps you don't even need the construction square, and use the outer points for the symmetries.

Sketcher has a fillet tool, which creates the necessary tangents, you only have to add the radii.

Besides that, you sketch is poorly constrained. You should prefer geometric constraints over dimensions. Repeating the same dimensions obscures the geometry behind and is prone to fail in case you have to change something.
A Sketcher Lecture with in-depth information is available in English, auf deutsch, en français, en español.
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papyblaise
Posts: 2617
Joined: Thu Jun 13, 2019 4:28 pm
Location: France

Re: newby needs help

Post by papyblaise » Wed Oct 21, 2020 9:18 am

draw the profile centered on the UCS, it will be easier
for the inner square, use the tool "Create a regular geometric figure" that you center on the UCS
Attachments
carré centré.FCStd
(22.53 KiB) Downloaded 6 times
carré centré.PNG
carré centré.PNG (17.19 KiB) Viewed 221 times
Bance
Posts: 886
Joined: Wed Feb 11, 2015 3:00 pm
Location: London

Re: newby needs help

Post by Bance » Wed Oct 21, 2020 9:50 am

Why are you drawing all of something which is so obviously symmetric?
fcaduser
Posts: 339
Joined: Wed Feb 19, 2014 6:53 pm
Location: Near Paris, France

fcaduser

Post by fcaduser » Wed Oct 21, 2020 10:05 am

+1

Something strike me. The intrinsic geometrical propreties a lot of parts have is often underused. It should be a general advice : "Detect symmetries and linear/polar nets. It's always a saving."
And here, it's blatant.
rosen71
Posts: 7
Joined: Wed Oct 21, 2020 7:34 am

Re: newby needs help

Post by rosen71 » Wed Oct 21, 2020 10:25 am

chrisb wrote:
Wed Oct 21, 2020 8:42 am
For the square: You can switch the inner square to construction lines and place the corners in the middle of the construction lines using symmetry. Perhaps you don't even need the construction square, and use the outer points for the symmetries.

Sketcher has a fillet tool, which creates the necessary tangents, you only have to add the radii.

Besides that, you sketch is poorly constrained. You should prefer geometric constraints over dimensions. Repeating the same dimensions obscures the geometry behind and is prone to fail in case you have to change something.

thank you for your answer, but I didn't get any idea what tio do, except the tangetnts.

You see the figure I am trying to draw, and I would be happy if can get a step by step guide.

On anothe note, I have a lot of drawing made in CorelDraw, which I can export in appropriate format (SVG), and once imported, i can't do anything with them.
rosen71
Posts: 7
Joined: Wed Oct 21, 2020 7:34 am

Re: newby needs help

Post by rosen71 » Wed Oct 21, 2020 10:30 am

Dear,
I am completely new in this, and for you it may seems to be simple, but for me it is not.

I believe that step by step instruction woyld be better.
Bance
Posts: 886
Joined: Wed Feb 11, 2015 3:00 pm
Location: London

Re: newby needs help

Post by Bance » Wed Oct 21, 2020 11:02 am

Have a look at this file:-
sym.png
sym.png (29.84 KiB) Viewed 167 times
Attachments
SYM_Bance.FCStd
(25.49 KiB) Downloaded 4 times
fcaduser
Posts: 339
Joined: Wed Feb 19, 2014 6:53 pm
Location: Near Paris, France

Re: newby needs help

Post by fcaduser » Wed Oct 21, 2020 11:34 am

@rosen71
57540_9_photo1_g.jpg
57540_9_photo1_g.jpg (34.86 KiB) Viewed 142 times
I perfectly understand that you are a newbie. My point was, before we can of course provide you a step by step explanation for a specific sketch, I invite you to develop the reflex i have mentioned.

Do you see the picture, for example ? There are two underlying polar nets, and imagine how tedious it would to sketch everything !
Last edited by fcaduser on Wed Oct 21, 2020 6:02 pm, edited 1 time in total.
rosen71
Posts: 7
Joined: Wed Oct 21, 2020 7:34 am

Re: newby needs help

Post by rosen71 » Wed Oct 21, 2020 12:33 pm

Bance wrote:
Wed Oct 21, 2020 11:02 am
Have a look at this file:-

sym.png
Thank you, but the dimensions are not correct.
Anyway, I have the drawings imported from CorelDraw in SVG format, but I don't know how do anything with them in FreeCad.
test_1.FCStd
(152.92 KiB) Downloaded 6 times
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