[done] Developing a spreadsheet based loaf pan

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Ulicad
Posts: 311
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Re: Developing a spreadsheet based loaf pan

Post by Ulicad »

Good day!

Along the advice from chrisb, jeno and papyblaise, further progress was made in 'hardening' and cleaning the basic model:
  • Flipping of sides in the sketch after recomputing:
    This now is avoided by rearranging the constraints / design suitably. The major measure was to draw a point(s) attached to the main coordinates to start with, where lines are constrained to afterwards. These points would not flip.
  • Dynamic main fillet radii set to zero:
    There is a conditional workaround in the spreadsheet now. Both are set to 0,001mm, if a zero-angle is desired for the CAD-model
  • The spreadsheet was edited to remove small errors and increase readability
Finally, two mirrorrings were made to complete the basic loaf pan.

IanP wrote: Sun Mar 26, 2023 1:01 pm ... Congratulations on great product design for real life purposes ...
Many thanks!


Here is how its lookig now:
loafpan131.png
loafpan131.png (131.48 KiB) Viewed 1023 times

I very much would appreciate the advice of you experienced people for the next (and hopefully last?) piece of workflow.

How (which tools) and in which state of the model would you draw the additional second set of cutouts (parallel and symmetrical to the first set) ? These can not be included in the mirrorings, since they are not symmetrical.

Hope you find some time!
Attachments
loafpan131.FCStd
(58.39 KiB) Downloaded 17 times
2nd-set-of-cutouts.png
2nd-set-of-cutouts.png (22.73 KiB) Viewed 1023 times
Regards, Ulicad / Uli
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Shalmeneser
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Re: Developing a spreadsheet based loaf pan

Post by Shalmeneser »

imho, too many values in your spreadsheet : you should use it only to provide user with an easy screen.
All technical values and calculus should be inside sketches or features.

Do you provide the dimensions of the flat metal sheet ?
Ulicad
Posts: 311
Joined: Tue Aug 16, 2022 10:35 am
Location: de_DE

Re: Developing a spreadsheet based loaf pan

Post by Ulicad »

Difficulties in understanding logics of the GUI:

1) selecting a Pad to apply a fillet to it

2) selecting the appropriate line of the pad
-> result: now, the Pocket is higlighted - before, it was the pad

3) having found the edge-no (#4), a radius is applied. This fillet now is shown sepately in the tree, neither attached to the Pad, nor to the Pocket, it seems not even in the body (though, it is wanted in the Pad only)

Ok, after relaoading, the solver has no problems any more with it - whatever this may mean?

Is this stable? (the model as a total)
In this case, all peculiarities to me as a beginner are stowed away for the time being...

Hope for your help! :?
Attachments
tmp-1.FCStd
(47.41 KiB) Downloaded 13 times
Regards, Ulicad / Uli
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Ulicad
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Location: de_DE

Re: Developing a spreadsheet based loaf pan

Post by Ulicad »

Shalmeneser wrote: Wed Mar 29, 2023 7:31 pm imho, too many values in your spreadsheet : you should use it only to provide user with an easy screen.
All technical values and calculus should be inside sketches or features.

Do you provide the dimensions of the flat metal sheet ?
Hmm - for me, the spreadsheet is a convenient place to store all settings and calculate all dependencies. I can't see a drawback in this - which would this be?

The sheet thickness now is shown as a preseet value.
Regards, Ulicad / Uli
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Shalmeneser
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Re: Developing a spreadsheet based loaf pan

Post by Shalmeneser »

You are mixing Part wb with PartDesign wb !
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rmn_hr
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Re: Developing a spreadsheet based loaf pan

Post by rmn_hr »

Shalmeneser wrote: Wed Mar 29, 2023 7:59 pm You are mixing Part wb with PartDesign wb !
The PartDesign-Fillet is here
PartDesign-Fillet.JPG
PartDesign-Fillet.JPG (35.3 KiB) Viewed 924 times
Just select the edge to fillet, click the icon 'Fillet', enter a radius in the popup-window.
You get a fillet within body right after Pocket.

As Shalmeneser stated: mixing PartDesign-WB and Part-WB is not a good choice and is not recommended
My workflow: create single components in PartDesign and arrange them with Zolko's Assembly4
(https://github.com/Zolko-123/FreeCAD_Assembly4 )

FreeCAD works pretty well and stable for me !! :)
Hymn of Praise valid again since FreeCAD 0.22.35449
Ulicad
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Joined: Tue Aug 16, 2022 10:35 am
Location: de_DE

Re: Developing a spreadsheet based loaf pan

Post by Ulicad »

Can't follow ...

A) WB Part Design
1) opening freshly the model
2) selecting part design
3) selecting the Body
4) selecting the interesting line of the body

---> result of 4): the Pocket is highlighted instead

Exiting FC.

B) WB Part
--> result: identical to WB Part design

Exiting FC.

C) WB Part only
1) .. dto.
2) selecting WB Part (for applying the fillet)
3) selecting the Body
4) selecting Fillet
In the panel, the Body is shown as selected shape.
4.1) 'Edges' are preselected in the panel, ok
4.2) trying to select the edge in the drawing -> this seems not permitted by FC
4.3) clicking edges no 3, 4 and 5 to apply radii of 3mm for a test (no idea where these edges are...)
4.3) pressing OK

---> result of 4.3): 22:28:53 Recompute failed! Please check report view.

All visible things are gone away...
Attachments
tmp-2 (reduced).FCStd
(38.53 KiB) Downloaded 13 times
Regards, Ulicad / Uli
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Ulicad
Posts: 311
Joined: Tue Aug 16, 2022 10:35 am
Location: de_DE

Re: Developing a spreadsheet based loaf pan

Post by Ulicad »

rmn_hr wrote: Wed Mar 29, 2023 8:18 pm ... The PartDesign-Fillet is herePartDesign-Fillet.JPG ...
Thanks, did not find this - coming back asap ..
Regards, Ulicad / Uli
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Ulicad
Posts: 311
Joined: Tue Aug 16, 2022 10:35 am
Location: de_DE

Re: Developing a spreadsheet based loaf pan

Post by Ulicad »

Shalmeneser wrote: Wed Mar 29, 2023 7:59 pm ...
rmn_hr wrote: Wed Mar 29, 2023 8:18 pm ...
Thanks :oops: :!:

How simple life can be :lol:
Regards, Ulicad / Uli
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Ulicad
Posts: 311
Joined: Tue Aug 16, 2022 10:35 am
Location: de_DE

Re: Developing a spreadsheet based loaf pan

Post by Ulicad »

Hello all,
I am lost in the chaos ... :? please help..

Can't even reduce the file to better show the problem, nor is the language much better to describe it.

There still is sooooooooo much to do and I am trying to figure out the exact values for the X/Y offset in the datum plane which is directly orthogonal to the pans top left edge (measured on the outside face of the pan). (the inner faces coordinates are slightly different because of the sheet thickness)

There is a discrepancy - at least of what I can see.

To explain:
1) in 2nd-view.png, the origin of the datum correctly seems to match the pans edge horizontally
2) vertically, this seems not to be the case (the origin looks a bit further 'upwards')
edit: understood now # 2), the origin must look somewhat 'higher' in this perspective...

3) while in 3rd-view.png, the vertical position looks correctly placed to zero / 0,000mm

This was the first discrepance, appearing to me. This may be due to display-inaccuracies however. May be and I don't really believe this..

The second discrepance also relates to the Y-offset (see point-top-left.png)
Its X-Y values are: X = -113,244mm; Y = -245,000mm

The -245,000mm are correct.

The -113,244mm seem somewhat off the pans top-line, yet, they seem to be calculated correctly.
Values-for-checking.png shows the coordinates set in the spreadsheet.


The calculated outer height of the pans side-face is 113,244mm (C35 in the spreadsheet).

The Y-values don't match, apparently.
Attachments
loafpan.model2.0.base-10.FCStd
(21.11 KiB) Downloaded 13 times
values-for-checking.png
values-for-checking.png (61.52 KiB) Viewed 795 times
point-top-left.png
point-top-left.png (95.84 KiB) Viewed 795 times
3nd-view.png
3nd-view.png (129.55 KiB) Viewed 795 times
2nd-view.png
2nd-view.png (80.33 KiB) Viewed 795 times
Regards, Ulicad / Uli
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