[done] Developing a spreadsheet based loaf pan
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Re: Developing a spreadsheet based loaf pan
CutoutDatum is hidden from the tree:
- Attachments
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- Snip macro screenshot-f94462.png (14.96 KiB) Viewed 1512 times
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Re: Developing a spreadsheet based loaf pan
Do'nt understand what is / was happening
To verify, I downloaded the previously uploaded file from the Forum to a separate folder.
Opening it with FC by doubleclicking, yielded the view #1 (corrupted somehow):
Selecting Start recovery yielded view #2 (successful):
Pressing finish yielded view #3:
Each view is showing CutoutDatum.
Absolutely no idea how this came.
Edit:
Could someone help and report what she/he is seeing after downloading?
Last edited by Ulicad on Fri Apr 21, 2023 11:47 am, edited 2 times in total.
Re: Developing a spreadsheet based loaf pan
It seems to depend on the settings, if it is shown in the tree or not. You should right click on CutoutDatum and uncheck "Hide item".
A Sketcher Lecture with in-depth information is available in English, auf Deutsch, en français, en español.
Re: Developing a spreadsheet based loaf pan
Done - the 'hide' was checked, now it is unchecked. CutoutDatum as an element was/is visible in the tree before and after.
Under no circumstances checked, I could see a hidden CutoutDatum tree-element.
Hope I could show that I never wanted to hide it - sorry for the inconvenience though!
Could this 'mixing' work?
Inching forward (after trials with an additional datum line as reference (green, possibly to be removed again))...
Is there a way to create a geometric 'mirror' of pan and pockets to the 'left' side?
Using Part Design:
- Selecting Pad, Cutout1and2, LinearPatternC3C4 and PolarPattern C5C6
Trying PolarPattern:
-> Error: 'Only additive and subtractive features can be transformed'
Using Part (probably there is the said 'mixing' problem):
Trying Mirroring:
- Selecting Pad, Cutout1and2, LinearPatternC3C4 and PolarPattern C5C6
-> some breakage occured
On second trial in Part, the mirroring succeded.
Part Design was activated again for further work
Could this 'mixing' of Part Design and Part be stable?
If so, the pan clearly would head towards reworking Spreadsheet and CAD-details
Is there a way to create a geometric 'mirror' of pan and pockets to the 'left' side?
Using Part Design:
- Selecting Pad, Cutout1and2, LinearPatternC3C4 and PolarPattern C5C6
Trying PolarPattern:
-> Error: 'Only additive and subtractive features can be transformed'
Using Part (probably there is the said 'mixing' problem):
Trying Mirroring:
- Selecting Pad, Cutout1and2, LinearPatternC3C4 and PolarPattern C5C6
-> some breakage occured
On second trial in Part, the mirroring succeded.
Part Design was activated again for further work
Could this 'mixing' of Part Design and Part be stable?
If so, the pan clearly would head towards reworking Spreadsheet and CAD-details
- Attachments
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- zko.loafpan.model2.0.base-12.191.FCStd
- (637.6 KiB) Downloaded 18 times
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Re: Could this 'mixing' work?
To pattern a pattern in Part Design, you have to use PartDesign MultiTransform. You can't sequence them separately.
Re: Could this 'mixing' work?
Many thanks for this hint!edwilliams16 wrote: ↑Fri Apr 21, 2023 6:39 pm...
To pattern a pattern in Part Design, you have to use PartDesign MultiTransform. You can't sequence them separately.
For comprehensibility, put in other words:
1. the two selected patterns would be deleted
2. MultiTransform: Polar Pattern would be used to 'mirror' all elements required to the 'left' side
Could you confirm this path, did I understand correctly?
Edit:
Ooops - the required mirrors would'nt be there then
Without a recommended path I need to continue hacking around...
Restart from scratch (loaf-pan)
My honest apologies to all posters and readers!
The chosen crash-way I entered into CAD and FC as an absolute newbie unintededly has resulted in reading, learning and practice on my side which hardly could be followed or helped by others.
Starting the model from scratch now, I hope for clarificaton on this very basic issue - Attaching and placing a sketch.
This is complex for a beginner and a separate Topic probably is not the right choice.
In the attached minimised file, the panel Attachment / Base / Sketch is looking like this: What seems not obvious at all are the values shown in Base - Placement - Angle & Axis?
The sub-panel Attachment is looking like this: No 'strange' values can be seen here.
Regards
The chosen crash-way I entered into CAD and FC as an absolute newbie unintededly has resulted in reading, learning and practice on my side which hardly could be followed or helped by others.
Starting the model from scratch now, I hope for clarificaton on this very basic issue - Attaching and placing a sketch.
This is complex for a beginner and a separate Topic probably is not the right choice.
In the attached minimised file, the panel Attachment / Base / Sketch is looking like this: What seems not obvious at all are the values shown in Base - Placement - Angle & Axis?
The sub-panel Attachment is looking like this: No 'strange' values can be seen here.
Regards
- Attachments
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- attaching-and-placing-a-sketch.case1.FCStd
- (11.42 KiB) Downloaded 17 times
Re: Restart from scratch (loaf-pan)
Having a cartesian reference coordinate system, every point in space can be described by 3 coordinates, usually named x, y, z. That's the Position part of the Placement. What remains is how the object is turned at that point.
You are thinking - as I do as well - in subsequent rotations: By turning the object by a certain amount first around x-axis, then around y-axis and finally around z-axis (or any other sequence of these three. If you think about a point on a sphere, then you can turn it to any arbitrary position by such three rotations.
Alas it would be smarter, if you do only a single revolve; that's what french mathematician Rodrigues does with his Rodrigues Rotation Formula (AKA Euler-Rodrigues-Formula). An application of this technique can be seen for flight connections, where airlines prefer to fly directly on a Great Circle instead of flying some zig-zag course.
FreeCAD shows you in the DataTab the axis and the angle indicating how much you have to turn the object around this axis.
A Sketcher Lecture with in-depth information is available in English, auf Deutsch, en français, en español.
Re: Developing a spreadsheet based loaf pan
1) Your info was a great calming of my worries - these still do arise very easilychrisb wrote: ↑Mon May 01, 2023 9:14 am... You are thinking as I do as well in subsequent rotations
... it would be smarter, if you do only a single revolve ... Rodrigues Rotation Formula (AKA Euler-Rodrigues-Formula)
2) Ughh .. the probably vector-based system used for these values is not exactly of my actual personal interest - if only I had paid more attention to the tool-tip..
Pre-release seems to be 'next door' now!
With the help of your previous posts I managed to find a single one of umpteen paths (all others were failing) to create what is needed - thanks again, very happy
After clarification of the actual missing point, the pre-release shall be edited for details interesting for (bread baking) users.
The problem is the appearance of the mirrored and / or multitransormed cutouts (pockets) as well in the FCStd-file as in the STEP-file.
Looking at the body after opening, both views are not showing the left-hand cutouts. When hovering over loafPanParts, these cutouts are visible as well:
What could I do to make all of them visible regularly?
(Please forgive - I just did not manage to get the order of the images right this time...)
- Attachments
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- base.247.loafpan.FCStd
- (101.46 KiB) Downloaded 17 times
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- base.247.view2.png (79.69 KiB) Viewed 1079 times