AutoCAD Inventor :: Ensuring That Sketches Are Closed Loops?
Mar 7, 2013
I am making some fairly free form sketches using lots of 3-point arcs that ultimately need to be closed loops so that I can extrude them. Although I have always been letting one arc snap to another at the end of the process I seem to have trouble closing the loop. It does not seem very apparent how to find the points that are not properly closed and I wind up struggling with the Close Loop function. Is there an easy way to tell where the problems are in a profile? I have tried showing all constraints, but that doesn't necessarily give me the clues I need.
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Feb 26, 2012
I am trying to import a complex curve from autocad lt (in my case an airfoil), to create parts. I have drawn the curve in autocad lt as a polyline. Autocad lt treats the curve as a single object, and seems to understand it as a closed loop.
When I import the curve into Inventor lt, Inventor treats the curve as a series of unconnected line segments. What can I do in either Autocad lt or Inventor lt to get Inventor to treat the curve as a single object, so that I can then extrude it?
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Nov 26, 2012
is there a way to use vb to add closed sketch loops to an existing feature?
I am trying to create a parametric template for a fan guard assembly, complete with drawings.
I am using an arrangement of circles defined using some linear sketch patterns as the cross-section of a revolved feature. Using ilogic/vb, I want to automate the number and spacing of items in the linear pattern, and then update the loops selected for the revolved feature.
I have found code on this forum (courtesy of Curtis Waguespack) that I can use to select all closed loops and create a feature. I can apply this code to create a NEW revolved feature, but I haven't been able to figure out how to use it to UPDATE an existing feature.
I need the feature to UPDATE rather than create new to maintain links in my assemblies and drawings.
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Mar 9, 2012
In regards to sweeping, what does the title of the post mean (self intersecting paths or loops are invalid for this operation). I have a 3D sketch consisting of 1 straight line, one spline with 4 points dictated by 'points' and an arc. All have tangential constrains to each other and I am looking to sweep a circle along this path to create a bent wire. I don't have anypictures or files as it is a stand alone computer at the moment.
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Nov 2, 2011
It happens often that a sketch has redundand points or open loops.
I don't want to run the sketch doctor to clean it up every sketch I create.
In the attached avi you can see the few steps that I use to create a sketch. I don't understand why at the end it has problems.
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Jan 24, 2013
Why does this code fragment not work? (Within an active part sketch, with some sketched geometry.)
I'm just trying to close the loops to have valid extrusion profiles.
Dim iCounter As Integer
Dim icounter2 As Integer
Dim oSPoint1 As SketchPoint
Dim oSPoint2 As SketchPoint
Dim xVal1 As Double
[Code]....
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Dec 19, 2011
Also, I'm having a hard time completely constraining copy 2D sketches. What Inventor requires to constrain a 2D sketch?
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Dec 13, 2012
What instances is it necessary to combine 3d sketches with 2d sketches, I have used this combination a few times where I have to build rectangular frames then apply frame generator to the sketches to construct the frame members. I was told when I originally had training on Inventor 2013 that 3d sketches should be avoided where possible.
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Sep 23, 2011
I want to fit a sketch that is to be laser cutted. i wanna fit 30 pcs on a rectangle, is there a tool who figures out the most optimal way to fit them in a rectangle?
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Dec 16, 2013
I shoot either in 720p or 1080p for different projects, but for any one shoot I produce a blu ray and a standard DVD disc (pal). I'm simply looking for clarification on best practice for transfers to MPEG2 to minimize loss of picture quality. I understand some loss is inevitable going from HD to SD, but a best practice for everyone is worth knowing.
My questions are,
1/ After applying my colour grades and FX to my project, am I best rendering the clips firstly in the SAME format they were taken? Then afterwards, take the enhanced HD clip and convert to MPEG2. Or, does it not really matter - just apply the effects and render all in one go to MPEG2?
2/ Is it better to downgrade from 1080p rather than 720P?
3/ I use 2 pass encode, 100% quality in my settings and ensure no re-rendering takes place on burning. Any other rendering or burning settings you recommend?
4/ Finally, on a 50" TV, the results are fair-good for the burned SD DVD. However, even commercially made films from the 80's still look better. Do they use a higher bit rate or different compression method?
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Oct 7, 2011
I have the following (somewhat philosophical) question: what is the concept of assembly sketches? As far as I can see (and what I use it for) is the following: an element of my design can be constructed from several parts, which are first machined with some margins, interfaces for welding, etc. Then they are mounted/welded/brazed together, and the final piece is constructed by post-machining the mounted (welded/brased/etc) assembly. Assembly sketches drive these features.
When I first got in contact with assembly sketches, I believed they can be used to positioning parts in the assembly: create a sketch, very easily and quickly draw lines/points/etc which serve as anchor points for the parts, and then constrain the parts to these lines/points/etc. But this does not work - whereas I would find it sometimes useful.
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Feb 8, 2012
I've been making a model plane model in inventor 2012 from imported IGES geometry, and Realised that my sketches were not assigned to any part (and thus can't be lofted). Is there any way of moving the sketches to the newly created part without redrawing everything? I've tried dragging and dropping because it seemed to make sense, but alas, that had no success.
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Nov 5, 2012
Once I check to show model sketches I cannot set it back since it getting inaccessible.
how to set it back to not show the sketches?
[URL]
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Mar 20, 2012
Quite often we cretae schematic line drawings for clients approval before creating full 3D models for production. Is it possible to achieve this in Inventor and maybe go on to use the sketches as a master filoe to drive the design? Or should I continue to get approval based in AutoCAD and then switch over to Inventor?
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Dec 19, 2011
I have been trying to create an ipart. Once the ipart is created i am un-able to edit the sketches of features with issues.
I need to modify a sketch and to create an alternate sketch (suppress/unsuppress) but get an error message when i try to edit the sketch.
Windows 7 64 bit
Inventor 2012 Professional
Dell T1600 CPU E31245 @ 3.30GHz
8 GB RAM
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Sep 15, 2013
I have created a frame using the frame generator that I need to document. It is created using about 5 sketches. The sketches are part of their own .ipt file. Now I would like to document the frame but cannot figure out how to do it. I have tried creating sections of the frame but I cannot snap to points of interest on the frame, such as where two pipes meet, when dimensioning. How do I document the sketches?
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Sep 18, 2013
I'm trying to employ a technique that I've used with SolidWorks. I'm working on a project with several engineers doing design work on a large assembly. The way I've seen this handled in a SolidWorks shop is to create a master assembly with sketches on the principal planes that define envelopes for sub assemblies, interface dimensions, and so on. Each engineer can have the master assembly in their sub assembly, as a guide. Where I've used this before, it has worked with integrating the sub assemblies later on.
Here's the complication: There are several different "families" of the product that require different dimensions on the master sketches. What I had hoped to do in Inventor was use view representations or level of detail representation to control the visibility of these "families" of master sketches. When an engineer includes the master assembly in his sub assembly he could then easily turn on the "family" he wants to see. But it turns out that neither view representations nor level of detail representations influence the visibility of sketches. (Position representations don't, either.) Sketches are either visible or not visible, regardless of which representation you're in.
Is there some way I can control the visibility of sketches, in groups?
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Oct 29, 2012
we very often create parts/assemblies using skeletal sketches, problem we encounter is that when we use the copy command in the components area on the ribbon.
The problem we have is that when we open the new assembly and components they are still looking at the original skeletal sketch. is there anyway to copy the orginal skeletal sketch to a new one and the new parts look at this upon using the copy.
At present what we do is make a copy and rename the original file. Then open the assembly and it looks for the original skeletal sketch, so we point it at the new skeletal sketch.
This is not an issue when we have a couple of parts in an assembly but if you have a lot of parts in the assembly it si very time consuming.
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Oct 4, 2013
In the course of working up a tooling proposal, I attempted to replicate a 3D part from a customer print. While doing so, I noticed that 3D Sketch will not, under any circumstances that I can find, allow an angular dimension between a line and a plane. The customer print has two pipes projecting at odd angles from a base flange, one of which has an elbow. The print lists datum dimensions for the open pipe ends and the elbow, and gives vertical and horizontal angular dimensions to define the directions in which the pipes emerge from the flange. I have defined these three datum points in 3D space without any trouble, but Inventor 2013 will not allow me to define an angle between these sketchlines and the XZ and YZ origin planes, or between these sketchlines and the faces of the flange base I've constructed.
I am currently waiting on a proper 3D CAD model from the customer, and I'm considering longhand trigonometric calculations to place these lines properly, but I find it very hard to believe that Inventor is incapable of constraining a line to lie along what is effectively the surface of a cone.
Using:
Inventor 2013
AutoCAD 2013
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Mar 12, 2012
I'm having issues when I create sketches using the line tool. I should be seeing constraints as I create them and a green dot when the object is closed. This is not the case however, and when i attempt to extrude or offset the sketch I can only select individual lines.
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Dec 19, 2011
i am working on an ipart. I have a spreadsheet with all the data and used the first line to creat the first part.
no problem.
i can add the remaining information to the table from the spreadsheet.
When returning to the drawing environment i can select a few parts that work and there are many more with "issues". So i move the first offending part select it and try to edit it. ( i know what i have to do to the sketch if i could just get into it) Also i have suppressed a sketch and inserted a new slightly different version (the issue) but, after getting out, i am un-able to edit this new sketch either.
the message comes back and says i cannot edit this part, and then....
unable to prepare the part for edit, updating your part is required to all the edit, update now?
Windows 7 64 bit
Inventor 2012 Professional
Dell T1600 CPU E31245 @ 3.30GHz
8 GB RAM
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Jul 23, 2012
I am trying to render some images and video of a design I've been working on.
This isn't an absolute necessity, but I would like to have my companys product and logo displayed on the monitor in the design. If you look at the screenshot what I'm trying to describe should come clear.
These images were just dropped into a sketch on the face of these two monitors.
When I go to render, the sketch image does not appear. It just renders the default face color of the part.
Is there something I'm missing?
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Jul 24, 2012
As I learn more about Inventor I have been doing more and more skeletal modeling. It work well for what we build here. But the biggest problem is the visibility of all the workplans and sketches. I know of the buttons to turn them on and off, but everytime I make a sketch and edit a sketch, inventor default turns all of them on. Making it impossible to see what you are working in the assembly enviroment. Not only that, it bogs down my machine untill I turn them off. Same goes for workplanes, if I create one the rest appear.
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May 13, 2013
In my section view, Get Model Sketches is inactive (greyed out; see attached).
It was OK up until recently, but now it would not show any sketches no matter what I try to do.
I would hate to recreate the view again.
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Aug 20, 2012
I'm working with a series of 3D sketches. Some sketches must remain visible as reference. While creating the sketches, the dimension call-outs grow too distracting from the linear sketches. Is it possible to hide, or toggle off/on the dimensions while leaving the sketch geometry visible?
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Apr 16, 2012
I have a part that I'm trying to loft using 3d sketches for the rails will this work? Everything is fine till I try to add the rails, As you can see the loft works with out the rails.
Windows 7 x64
IV 2012
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Oct 30, 2012
I'm currently dealing with a few issues with my PC, and it may be that I'll need to have it repaired, which might mean that I'll need to re-install applications such as LR once it's been fixed. I therefore want to ensure that all of my files are protected.
I currently have a solid system for backing up my photo files, so there are no problems there, and I also make regular backups of the catalogue to a seperate drive, so again I have no concerns with losing the catalogue itself. I also keep a backup of the preferences file, just in case I need to trash the one in use so I can then easily recover by replacing it with my copy. The one missing link is that I don't really make any backups of the various presets (having said this, Windows does back them up on a monthly basis).
I figure that, if I need to do a clean re-install, I can drop my prefs file into the relevant folder, overwriting the current one, and that I would just need to have a copy of the presets folder and do the same thing with that... Is my thinking correct here?
When I say presets, I don't just means ones in Develop, I mean things like settings for print templates, export presets, etc. I really don't want to risk losing these and having to set them all up again from scratch.
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Nov 26, 2013
I am making a control console with a bunch of plastic tags on my pilot devices. I use the sketch text tool to write the label on each tags.
When comes the time to make my drawing, I get my model sketch and they show on my 2D, no problem.
Well today, it seems Inventor 2014 just gave up on giving me my sketches. Here is the console view of of the lid with the tag texts showing:
Now let's go over the second lid on the same plan and get my model sketch to see the rest of my text.
Click on it and ....
Nothing! still no text.
Windows 7 Ultimate 64-bit SP1
Intel Core i7-4930MX CPU @ 3.00GHz
32.0GB Dual-Channel DDR3 @1600MHz
NVIDIA GeForce GTX 780M 4GB Ram
240GB SSD/500GB HDD
Autodesk Product Design Suite Premium 2014
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May 28, 2004
I just wanted to know if you could make sketches in one part or file, somehow save it with a name, then open a new or existing part file and import that saved sketch. Is there a way to do this? Also, can you make blocks, as we could in AutoCAD, in Inventor?
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Aug 20, 2013
One of my parts had "Invalid origin/axis" problems and I got all my visible aketches fixed. But I have what I call "ghost" sketches left from bolted connection updates, erasures etc. I can get rid of the visible points but cannot access the sketches to erase them.
The red + sign showing irritates me and I want rid of it.
I have attached the file, 2014 version, some of the adaptive features may not come thru or they may work better on another computer, who would know.
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Jul 26, 2013
VBA routine that will allow you to select a work plane in the browser and find all sketches that are defined by it. We do extensive skeletal modelling and our master parts consist of many sketches and sketch planes
Note, I am aware of the VBA routine that allows you to select a sketch and highlight the plane or surface that it is made off of.
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