3d Dynamic block for metric bolts
Dynamischer Block (= DB) mit 3D-Geometrien (egal ob Volumen- oder Flächenmodell) wird nix.
Volumenkörper entziehen sich völlig den im DB zur Verfügung stehenden Aktionen. (Nicht mal normale AutoCAD Befehle wie Strecken sind auf Volumenkörper anwendbar).
Eine Hoffnung für simpelste Flächenmodelle hatte ich, weil assoziative Flächen ihrer 2D-Ursprungsgeometrie folgen können. Klappt aber auch nicht (gerade getestet), in einem DB verlieren die Flächen ihre Assoziativität. Und z.B. eine Extrusionshöhe mit einem benutzerdefinierten Parameter zu steuern (den man dann im Eigenschaftenfenster verändern könnte) funktioniert ebenfalls nicht. Die Wertänderung kommt am Modell nicht an.
Also - vergiß es (zumindest nach meinem aktuellen Wissensstand).
cadder
Jürgen Palme
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Korrektur zu meiner obigen Aussage, daß assoziative Flächen ihre Assoziativität verlören. Das stimmt nicht (sorry wegen der Fehlinformation). Praktisch sinnvoll anwendbar wird's davon aber dennoch nicht.
cadder
Jürgen Palme
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@j.palmeL29YX schrieb:Korrektur ...
Der Anhang (2013er dwg-Format) zeigt an einem ganz einfachen Beispiel: entgegen meiner obigen Aussage (Asche auf mein Haupt) läßt sich durchaus ein "Dynamischer 3D-Block" erstellen, sofern ein Flächenmodell genügt.
Daß eine der Abmessungen (Höhe) hier nicht durch Zupfen an einem Griff, sondern nur über das Eigenschaftenfenster geändert werden kann, ist sicherlich kein absolutes k.o.-Kriterium.
Ob das bei komplexeren Modellen auch gelingt wäre im jeweils konkreten Anwendungsfall durchaus einen Versuch wert.
@Anonymous Kannst Dich nach diesem Prinzip ja mal an deine Schraube heranwagen ...
cadder
Jürgen Palme
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First a big sorry for posting in German above. I jumped between different forums and was not aware that I posted in an english thread.
Now to the topic.
Attached a Dynamic 3D-Block (surface model). After selecting the block reference you can change the nominal size (M3, M4 M5, ...) either in the properties window or after picking the blocktable. The length of the bolt you can change in the Properties window.
It is a rough draft. Feel free to refine it (if you can live with a surface model). If you need urgently a 3D-Solid model - I don't see a possibility to solve the challenge.
In the video https://autode.sk/2ShHzav you can see how to use the block.
cadder
Jürgen Palme
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@Anonymous schrieb:
Any chance you could do me a nut and washer PLEASE.
Give me a fish and I will be sated for one day. Teach me to fish and I will be sated all my life. 
If you understood what I did then you should be able to do it yourself.
Some tips:
- This suggested way only leeds to success if you can build the model from a planar sketch in the XY-plane. For a washer and a simplified nut this is not a problem.
- The draw the sketch (a circle for the washer and a polygon for the nut).
- If necessary add parametric constraints to get a form stable geometrie. (look at the head of my screw).
The goal: If you (later) change any dimension (e.g. the distance between two parallel lines), the shape must always remain a regular hexagon.
- Add the needed dimensions (bcparameter command). The values should be User Defined Parameters (thei must be created before).
- Extrude the sketch as surface (associativity ON)
- Close the ends (surfpatch command)
- Add the block table ... and ready.
If you need help at any point ask again.
cadder
Jürgen Palme
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@Anonymous schrieb:
Sounds complicated......
...Oh dear!!!
OK. Here a step by step video how to create a nut.
https://knowledge.autodesk.com/community/screencast/c4b296f2-df0a-446b-8e30-f1e59a63a643
- start with a polygon (hexagon).
- next you have to make sure that the polygon always keeps its symmetrical shape, regardless of where you drag at the geometry. Use as many constraints as necessary. (There are a lot of possible combinations to get a stable result. )
- The same with the circle (if you need a hole).
- Create parameters and add dimensions to the geometrie. For the values use the parameters.
- Extrude the shape(s) as surface(s), close the open ends (surfpatch) and trim to get the holes.
Now you can change the values of the paramters, the model will follw the modifications.
Not to see in the video: create a Block Properties Table with a list of all needed variants. (You can see an example in my first video).
HTH
cadder
Jürgen Palme
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@Anonymous schrieb:
... see if I have done something wrong
You haven't really done anything wrong, just a little inexpedient. You fixed the left upper endpoint of the contruction line instead of its midpoint. So the object will move away when you change its size and you will have to place it again in a drawing. (If you first choose the size of the nut and then move/rotate it to the right place that's no matter).
I'd add a fix constraint to the midpoint of the construction line.
In the video https://autode.sk/2OeoN0d I placed the UCS icon in its standard corner to see better what happens.
Now you should be able to create some parameters and add the dimension.
cadder
Jürgen Palme
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@Anonymous schrieb:I have called mine AF ..
A dependant expression cannot be evaluated.
The parameter is used in an expression James
I see you are using a vertical product (Pro_Stahl_3d). Maybe there is a conflict with a predefined parameter of this application. Try another paramter name.
Here it works well: https://autode.sk/2zcnOZ6
Or try it in a plain AutoCAD ... (?)
cadder
Jürgen Palme
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@Anonymous schrieb:Hiya...tried a different parameter name........same error?
Did you do it in Plain AutoCAD?
Did you do it the same way as demonstrated in my last video?
Did you do it in the same file which you posted in #13?
cadder
Jürgen Palme
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@Anonymous schrieb:I don't quite get what the Shift+AF means and how you put that in...
Sorry for being a pain.....
I overwrite the current numerical value of paramter d1 (144.~) with the name of the parameter AF.
I 'm afraid (I guess) you overwrite the name of the parameter d1 with AF (?). If so, that is wrong.
cadder
Jürgen Palme
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