Challenges?

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FBXL5
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Re: Challenges?

Post by FBXL5 »

thomas-neemann wrote: Fri Jan 20, 2023 10:46 am my clientele has had good experiences with the introduction of 2d cad. with the switch to 3d, an improvement was expected again. but there was a deterioration in terms of construction times
Maybe they forgot to properly train their staff. Or 3D data was only used to derive Drawing, because they didn't invest in machinery using interfaces to 3D software.

If one is unable to use and maintain new tools properly he will always be faster with the old ones and will never find the benefits of the new ones nor figure out smarter workflows.

Your clients must be quite smart if their parts are production ready on first try. If you have to deal with adaptions and modifications on the way to the finished product a parametric approach will save time in the end. And it is more fun to set a few properties instead building most of a part from scratch.
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thomas-neemann
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Re: Challenges?

Post by thomas-neemann »

FBXL5 wrote: Fri Jan 20, 2023 12:45 pm ....
there are many professionals, including an engineering office with many different systems and areas of responsibility. it can of course partly be as you suspect, but not 100%. the statement that it now takes at least twice as long but is 100%
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jfc4120
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Re: Challenges?

Post by jfc4120 »

A challenge on finding the amount of rotation one bend is from another:

Image and drawing file attached. I have a tube bending program I wrote in the later 1980's in BASIC, I converted to python, so the solution is fairly easy.

However I wanted to solve without the program, I came up with the same solution. Just like to see how some of you would solve it in freecad. The program gives:

Code: Select all

D = DISTANCE BETWEEN BENDS						
A = ANGLE OF BEND						
R = +- ROTATION FROM PREVIOUS BEND						
DW = READING ON 360 DEGREE WHEEL						
SB = SETBACK						
LOB = LENGTH OF BEND						
						
						
     NO	D	A	R	DW	SB	LOB
1	5.73	90	0	0	0.5	0.79
						
2	12.21	46.54	131.56	131.56	0.22	0.41
						
3	6	90	-142.19	349.37	0.5	0.79
						
4	5	0	0	0	0	0

##########  image included also in case table doesn't show correctly.

I will post my solution a little later. Also the added planes are just to help visualize.
Attachments
ch3.png
ch3.png (44.5 KiB) Viewed 675 times
ch1.png
ch1.png (27.35 KiB) Viewed 687 times
ch2.png
ch2.png (18.46 KiB) Viewed 687 times
rotation9.FCStd
(18.44 KiB) Downloaded 16 times
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thomas-neemann
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Re: Challenges?

Post by thomas-neemann »

jfc4120 wrote: Fri Jan 20, 2023 7:34 pm ...
is that meant?
Bildschirmfoto_2023-01-20_20-54-33.png
Bildschirmfoto_2023-01-20_20-54-33.png (13.61 KiB) Viewed 665 times
rotation9-tn.FCStd
(21.99 KiB) Downloaded 11 times
Gruß Dipl.-Ing. (FH) Thomas Neemann

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jfc4120
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Re: Challenges?

Post by jfc4120 »

No, not that angle, the one needed is 142.19 degrees. Pretend it's pipe and you are having to rotate another elbow around.
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Re: Challenges?

Post by thomas-neemann »

jfc4120 wrote: Fri Jan 20, 2023 8:14 pm ...
can you draw the angle in a hand sketch?
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jfc4120
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Re: Challenges?

Post by jfc4120 »

I will, on mobile now give me a few minutes and I will boot up desktop.

Edit, I am back on desktop:

It's the angle between plane 2-3-4 and plane 3-4-5, see new image: And sorry, I drew in yellow lines at the wrong places.

I will redo the image when I can.
Attachments
ch4.png
ch4.png (31.13 KiB) Viewed 599 times
Last edited by jfc4120 on Sat Jan 21, 2023 1:32 am, edited 2 times in total.
chrisb
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Re: Challenges?

Post by chrisb »

jfc4120 wrote: Fri Jan 20, 2023 7:34 pm

Code: Select all

D = DISTANCE BETWEEN BENDS						
A = ANGLE OF BEND						
R = +- ROTATION FROM PREVIOUS BEND						
DW = READING ON 360 DEGREE WHEEL						
SB = SETBACK						
LOB = LENGTH OF BEND						
						
						
     NO	D	A	R	DW	SB	LOB
1	5.73	90	0	0	0.5	0.79
						
2	12.21	46.54	131.56	131.56	0.22	0.41
						
3	6	90	-142.19	349.37	0.5	0.79
						
4	5	0	0	0	0	0
For a Challenge you can of course provide the data you want, but wouldn't it be more realisitic to give the points 1-5 by their xyz coordinates?
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jfc4120
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Re: Challenges?

Post by jfc4120 »

That's why I included the drawing each of the points if you select one at a time shows the XYZ coordinates.

Give me just a little while and I will post them. Back on desktop:

Code: Select all

X	Y	Z
-3.28859	10.00000	4.69799
		
0.00000	10.00000	0.00000
		
10.00000	10.00000	7.00000
		
15.03512	6.74339	7.00000
		
15.03512	6.74339	12.00000

points.csv included. The table didn't post just right.
Attachments
points.csv
(156 Bytes) Downloaded 14 times
chrisb
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Re: Challenges?

Post by chrisb »

Oh, sorry, I had missed the attached file.
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