3ds Max :: Constraining Elements In Technical Animation
Aug 24, 2012
I'm using 3Ds max design 2013. I've imported a model of a dwell mechanism from Inventor CAD. I want to animate the operation of the mechanism. I'm not that experienced with animation in 3Ds max. I've managed to do it by linking parts appropriately, then physically rotating parts and setting keyframes. This works, but the result is not very accurate and not very smooth.
I was hoping to use a better technique to do this. I understand the principles of IK and bones, but have never really used them. I've had a quick look at massFX, hoping that I could constrain parts to each other and then let the physics take over.
I've attached a youtube link of the mechanism. There are hinged joints, rolling joints (the roller on the cam) and sliding joints. Can these be defined as constraints within 3Ds max?
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Apr 20, 2012
How can I make a curve's end points constrain to objects in order to create a "theta" angle line that changes dynamically when the angle between the two objects changes?
I thought they answer may have lay in creating the curve using Maya's new Bezier Curve tool, then using the Rivet plug-in from CreativeCrash to pin it to the middle of two poly cylinders (the "x" and "y" axis.) Unfortunately this doesn't work; the Script editor spits back "is not a vertex!". Either I'm not using Rivet correctly or the end points of a Bezier Curve in Maya are not the same as a CV Curve. But perhaps I'm going about this the wrong way entirely.. I ultimately would wish to extrude geometry about this curve to create a dynamically changing curved cylinder to visualize the angle. It seems like it should be a relatively simple thing to do...
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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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Sep 21, 2002
I want to sample part of an image and clone it at the same point on the horizontal axis but further along. Holding down shift doesn't seem to work for constraining any of the brushes along an axis. Is there a way to do this?
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Nov 12, 2013
When I rotate the drive shaft gear very slowly, the assembly follows the the correct motion path, (figure 1), however, when I rotate it quickly, the assembly snaps the linkages to an orientation that is not physically possible, but satisfies the geometrical constraints (figure 2). I can't use contact solver because I am using the adaptive function for my sub-assembly to avoid having to re-constrain many parts.
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Mar 26, 2012
Is there a way to do this? 2 parts, 1 has a hole in it and the other has a slot. I want to constrain the center of the hole to the center of the slot. How do I do this?
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May 10, 2013
I'm just getting started using the Tube and Pipe environment for some of my work, and I've got what I'm hoping is a simple question with a simple answer. In the picture attached I've got a 1" pipe dropping down into a 8" pipe which I've disabled because it's a standard part right now and I want to replace it with a tube & pipe run. The thing I seem to have the hardest time doing when routing my pipes is aligning/offsetting my nodes with existing geometry in the assembly. In this case I want the end of the 8" pipe to be 12" offset from the centerline of the 1" pipe, and for the 8" pipe's centerline to be 12" below the bottom of the mezzanine's I-beam (as the standard part it is now). What's the best way to do this in the Tube and Pipe environment?
I tried "Include Geometry" from the "Create" panel but that only lets me create planes, which won't work with offsetting from the 1" centerline. However, SOMETIMES (it's a big sometimes) ALL of the options in the "3D Sketch" tab are available. When that's the case, I can go to the "3D Model" tab and create workpoints, axes, and planes. Sometimes, though, they're not all available, and I'm not able to place anything but planes. How I can change it so I can always use all the geometry of my assembly?
Also I'd like to know if constraing fittings and point-snapping routes to my assembly geometry in this way is the best way to do Tube and Pipe routes. Will doing this allow my routes to update if the assembly changes?
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Dec 26, 2012
I am assembling a weldment and need to place a looped bar onto a tubular stanchion 50mm below the top of the stanchion. I have made axis at each point on the stanchion and the bar, but i cant figure out how to constrain the loop to the point I require. All I can get it to do it to constrain to the centre of the stanchion only.
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Jul 2, 2013
I have a piece of steel that I need to flex. It is a piece of blue tempered spring steel pressed against the corner of a brass pressure transfer. The opposite end of the transfer is tangentlly constrained to a latching mechanism. When the latching mechanism is lifted, the transfer rotates slightly around a screw (made invisible) and the spring is flexed. When the latch is released, the spring returns the latch to the closed position. I have several other assemblies that use the same principal, but some with just a piece of mild steel used as a cover as well as a spring.
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Jul 19, 2007
I wonder if anyone can help me out with this. When I try to transform something I use the shift key while transforming to constrain the proportions but for some reason it has stopped working and I can not figure out why and how to fix it.
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Nov 14, 2011
I am having trouble constraining the wire track in the attached picture. I want the track to move naturally when the sliding piece moves, however it folds over on itself and doesn't stay in line. I can't figure out anyway to make it look uniform and move they way it should, is it possible in inventor?
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Oct 22, 2012
My goal is to let some wheels roll in a path which exist from 2 straight paths and a corner. I can constrain them to 1 path at a time but not to all of them so my wheel makes a corner. I
You can find the guide rail as attachment. There is a path in the sketch from which i sweeped my form but he divides it in the 3 parts so i can't constrain the center point of my wheel to this path.
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Mar 13, 2012
is it possible to constrain an item twice to a base, because a task i'm doing requires a tank to be constrained to 2 completely different parts. What i've got so far is one end will go through the whole way.
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Dec 13, 2011
I am trying to make a 3D sketch that is constrained to two different parts in an assembly. I want the sketch to be constrained to each of these parts so that if you move the parts relative to each other the sketch will adapt.
I have tried using work planes and project geometry but when I go to move the part the geometry won't always follow the part. I am using a spline for the 3D sketch so it should be able to adapt when the parts are moved but the problem is constraining it to something that follows the part.
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Nov 6, 2013
Is there a way to have a 2-jaw parallel gripper's jaws move in synch? That is when I move 1 jaw the other one moves the same distance.
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Apr 17, 2013
Can Lightroom constrain images to a fixed pixel width regardless of height and orientation?
None of the options in the image sizing dialog seem to be suitable; for instance constraining the "long edge" would work for horizontal images but not for vertical ones.
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Apr 11, 2013
I am trying to make a robot chassis in inventor using vex parts. I have a full library of vex parts. I have my basic chassis constrained but for some reason when i use the move command the parts still move, but then snap back into place.
Also, after giving up on the moving chassis i tried to move onto bearing flats. Bearing flats consist of 3 holes in a line that match up with the holes in the chassis rails. I constrain the face of the bearing flat to the face of the chassis rail. This constraint works and removes a degree of freedom. However, when i try to remove the other 2 degrees of freedom they dont seem to go away. I use the tangent constraint, constraining the hole of the bearing flat to the hole of the chassis rail(which is square) using an offset to make the hole centered. I constrain in both of my remaining degrees of freedom, but they bearing flat still moves.
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Apr 10, 2013
I have a vector drawing of a logo, currently in adobe illustrator format. I'd like to create a 2D sketch in Autodesk Inventor and then insert this drawing into the sketch as a shape that can only be placed and scaled.
The way I'd expect this to work is essentially that I'd get a rectangle X enclosing vector object Y, and that I'd then be able to create a fully constrained Inventor sketch by simply constraining the corners of this rectangle X. Is it possible to do something along those lines, and if so what is the best practice for it?
What I tried, which failed, was this:
1. Converted the AI file to a .DWG file
2. Used the "Insert ACAD" command to place the file in Inventor with the Constrain End Points and Apply geometric constraints boxes checked (other boxes were unchecked)
3. Waited for a surprisingly long time for this operation to complete, maybe 30s on a 16GB 2.6GHz quad machine
The result of this operation is that I now see my imported geometry, BUT all vectors are treated as individual shapes and I have 2637 dimensions needed.
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Nov 2, 2013
I am making an Inventor Solid Model of a small model engine I hope to build.
how to constrain the cam shaft cams to the valve lifters.
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Jun 14, 2006
Is there a simple way to constrain a crop to a certain aspect ratio? I have a bunch of cropping to do and the results all need to be 5:3. It's not that difficult to use the info palette and get the aspect ratio right but it would be way quicker if I could just constrain the crop tool to those proportions.
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May 1, 2013
I'm coming from a Symphony and FCP background. I do a lot of keying in the timeline when I'm finishing, so I'm often moving the green screen clip from track 1 to 2 and then putting the BG on the lower track. I'm used to being able to constrain the movement of the clip so that it doesn't slide around on the timeline and get out of sync when I move it. Does smoke have a hotkey for this? I've noticed if I hold shift, I get some indication of where Smoke is lining up the clip relative to other clips by some highlighting, but this does not constrain the clip I'm moving.
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Dec 29, 2011
How does one constrain a sketched line in the sketcher to a datum plane?
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Mar 29, 2013
I have an oddly shaped flat plate extruded from a sketch, the sketch of which has lots on constructions lines, none of which actually represent solid edges of the plate. However, I want to locate the plate to other components via the geometry defined in the sketch.
I find that when I am trying to constrain the plate to other parts none of the sketch geometry is available to me. Points, lines, construction lines, circles; I can select none of it when constraining. I am confused. How can I constrain such a part?
Just to clarify - the flat plate is the base of a structure. Its profile is decoratively shaped, so nothing about the cut edge of the plate is suitable for constraining to. I need to constrain off geometry defined in the sketch.
I have "Shared" the sketch.
Inventor 2013
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Feb 13, 2013
Why is it that when you create the first constraint between any two components, the secondary component moves not only to satisfy the constraint, but also in ways that have nothing to do with the constraint. This is not occasional behavior, it happens every time.
I always have to stop and move the secondary component back out of the way to get to the other features I need to reference to continue.
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Nov 21, 2009
How do you fully ground & constrain Tube & Pipe Routes?
The problem I have is after I complete My runs & routes & I have to make a dimension change in my Route, my route does not stay vertical & horizontal, then I have to start all over, which is very time consuming
I'm sure there is a way to do this , just like in a regular sketch, you want all of your lines to turn purple so it is fully constrained , well with the routes they are not, only the very first line then the rest of the lines in the route are blue. I have tried to use regular constraints but I get the error message saying constraint already applied.
I have also tried to ground a work point from where the route starts from, & that didn't work.
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Jan 24, 2013
I'm really struggling with constraining a weldment assembly. I've attached a JPG of the Assembly but I cant get the constrains to go where I want them.
Basically this assembly is a wheel with three equally spaced stays welded to a large nut hub. I have constrained the center axis of the wheel to the center axis of the Nut so the wheel and nut will remain aligned.
What I'm struggling with is constraining the three stays to the wheel and to the nut equally spaced around the nut.
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Aug 7, 2012
Unfortunately, it's chock full of proprietary customer data, so I can't share the parts or the assembly. But I can pretty well explain what needs to happen, and I've attached a JPG that shows a bit of what I'm doing.
I need to design a bracket to hold an RPM sensor at a certain gap to a spiral bevel gear. I've got a huge assembly model (non-Inventor) from the customer, as well as the model for the sensor. My plan is to start a master IAM, insert the customer assembly, insert the sensor and constrain him, and draw the various hardware I need around the sensor.
So I start by making a work plane that matches the bevel angle and is in a location so the end of my sensor will be flush to that plane. Create a sketch on that plane, then project 2 relevant axes to create the appropriate "origin" from which my location will be based. Place a point on one line, at a certain radial distance and constrain my point.
So now I've got a point and a plane that are where I want my sensing face and my centerline axis to be. What now? I was thinking that I'd create a work axis "normal to plane through a point", but this workflow isn't available in the assembly environment. I can't constrain a solid to a sketch point, so I really don't know what to do at this point in order to put the part where I need it.
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Apr 1, 2012
For our office I'm trying to figure out (so far without success) how it might be possible to constrain movement of a block's geometry to a single plane?
I can use a stretch grip but that will mean you can go in one direction only (positive) not negative, I want the freedom to be able to move backwards and forwards in the X-Plane.
Block I'm working on (progress so far) attached. It is designed to display height relative to a datum point in the block, and for use in drawings so you can place it all over and pick up levels to top of things like steels.
The block allows the use to pick the stretch grip to go up, so the objects moved will be to a point which will be relative to the base point of the block, which will be set at a datum level for the drawing. Relative to the base point a field will extract the y-coordinate of an object in the block, add a suffix of mm, that will then be the level relative to the base point.
I want the move command constrained to move the block geometry in the drawing but only in the x-plane; if the entire block moves accidentally in the y-plane it will also move the base point also, which destroys the idea of measuring against a fixed datum.
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Oct 23, 2004
when im trying to run photoshop it closes after 'Sorting fonts...' but image ready works :C i tried reinstaling it like 9 times, i have reinstaled window - nothing :< i have no viruses or ad aware. its Adobe Photshop 7
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Feb 25, 2013
I am trying to simulate the path of ropes through pulleys/sheaves etc. It's a bit of a chicken-and-egg set up.
My workflow is the following:
Assemble and constrain geometry
Create plane in assembly than rope will run on.
Create in-place part (rope) with box ticked for "constrain to sketch plane" or the like, referencing above geometry.
Question 1: I see my in-place component is not constrained to referenced geometry, I can drag it around?
I then ground it or constrain to workpoints used as part of the original "project geometry".
I then alter the original geometry and...nothing!
Question 2: How do I get my rope to adapt?
Attached is a mock up - original contains assemblies within assemblies etc. The base has been altered after creating the in-place parts, and the rope has not followed suite.
Inv 2013 Pro
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Jan 9, 2014
i've had pse 6 for my mac for a long time, and the animation settings won't work.it's been stuck at 0.2 for a while, and i need it faster.
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