I created the gear (helical) in the attached file using the standard gear tool in inventor. The problem is how do i then find the mass moment of inertia of it using Inventor?
View 1 RepliesHow the mass moment of inertia (kgcm2) is calculated in inventor?
It says it is calculated using negative integral, however i dont find this very informative.
I used the data for a report, and need to justify how i got the center of gravity and inertia properties.
A formula, method or algorithm would be nice.
I am trying to determine the moment of inertia of an L-section using IV 2009. By selecting Tools>Region Properties of a closed loop profile in the sketch environment the moment of inertia is given, however the principal axes through the centroid are at 45 degrees to the toe of the angle (see attached image). I want Ixx and Iyy where the X and Y axes are parallel to the horizontal and vertical toe respectively.
Coincidentally, AutoCAD orientates the principal axes the same when viewing the Region Mass Properties of a similar Region.
I have a problem with Inventor pro 2013 rounding of the area moment of inertia to zero (region properties). For example if I create a new sketch and draw a 1 mm x 0.5 mm rectangle and measure the area moment of inertia it will be 0 for one of the pricipal axes. If I change the rectangle to 1 mm x 0.6 mm it doesn't round it off. Seems like there's a problem with the precision in the calculations somehow.
I have tried to change the document units to microns but the same thing happens.
is there a way to make inventor do this calculation correctly?
I would like to get the moment of inertia of a deck slab of a bridge on the hatched areas. How can i do it?
View 2 Replies View RelatedHow do I calculate the moment of inertia for a hollow section? Do I need to use Lisp?
View 9 Replies View RelatedInventor 2012
I'm not able to get the right gear rotation in a planetary gear drive that I'm working on.
If I make the ring gear stationary and rotate the sun gear, the planetary gear engages and rotates around the ring gear
but in the opposite direction of what it should be turning. The planet to sun gear engagement rotates backwards regardless of what I do to the rotation constraint that I've applied.
If I make the ring gear free to rotate, and the planet gear stationary, the gear train rotates properly.
I've attached a mock up of the plant gear system to share and show what I'm dealing with.
I have generated a gear set using inventor. Now I would like to 3d print the gears. I have uesd the export tooth shape to get the true tooth profile. now I am attempting to use the coil feature to generate the helical tooth. The problem im running into is in the coil tool I can only give it a Revolution and height dimension. The hight is the width of the gear, but I am having a problem converting the helix angle to the "Revolution" perameter. I have read other posts and they say that it is Helix angle / 360. I have tried that and then compared it to the original gear generated by inventor and it is not even close. I need to do this on in internal gear and match it to an external gear.
View 2 Replies View RelatedI have created the part based on piece of standard angle taken from library. Now I want to make a mirrored copy of this part by Component-Mirror.
Inventor does not let me do it with standard part.
The question is: How I can transform a standard part to normal one, I mean I could get rid of belonging to standard part? Making a copy does not work. The only way is to derive and mirror this part but I wish there could be easy way.
Try to move an object and it does not stay fixed to the move tool cursor, but instead it accelerates off in the direction I initially tried to move it..... but in a sliding inertia type multiplied movement. Have I selected a different mode for the move tool by mistake?
I've checked the pivot point of the object I was trying to move and it was located centrally, nothing strange there.
Also, after the object has wizzed off the screen, pressing undo or [ctrl+z] won't bring it back to it's original location. The undo option is greyed out in the edit menu, suggesting that nothing has been saved in maxs undo history.
System information: Win7 x64 / 3DSMax Design 2014 SP3 / AutoCad 2014 SP1 Lenovo E30 ThinkStation Xeon E31225 Quadcore @3.10Ghz PNY GTX760 XLR8 2GB (334.89 Driver) 24Gb Ram Corsair 650w PSU
My company have created a standard cui that we all must use and cannot be changed in any way.
Whilst I agree this is a good idea, there are a lot of command icons missing from the ribbon which I use frequently.Is there any easy way I can add these to my cad setup ?
I've been looking for a solution to remove the unit string ie Lbs, g, kg from the value given from a 'Mass' value in a text string.
As you may all know, creating text and having a 'physical property - mass' value...the unit string is there...
Lots of people on here have the problem...no-one has got a solution.
Until now...
Basically...open the part you need to get the mass property of in your text string.
Follow the instructions on this webpage...this is the first part...
[URL]
Basically, this creates a Mass property value in the parameters table that you can call on as a text parameter.
It's similar to the custom iproperty model - mass but NOT the same.
Once you have done this, you can go to the drawing of the part and create a text string in the drawing and call it up as shown in this procedure. BUT it still has the unit string.
Here's the best bit that you want to know...
To get RID of the unit string...open up the part again from the drawing...click on the parameter icon...find the user parameter...in the Nominal value column, right click on the value and you get a pop-up that gives you 3 options...
Custom Property Format, Make Multi Value & Delete Parameter.
Click on Custom Property Format.
The pop-up window comes up...showing you the property type...in my case...the 4 left columns read Text, g (grams), Format & Precision...
On the right hand side I have a Preview of the text...then 3 check boxes...Units string, Leading Zero's, Trailing Zero's.
Units string is checked.
Uncheck it.
Close it...Save your part...go back to the drawing and hey presto!...the text now shows the weight you require as a straight value...no units!
I am working on a project for an electricity and magnetism class that deals with using neodymium magnets to propel other neodymium in around a ring. Any method of both importing neodymium or any other rare earth magnetic material into Autodesk Inventor 2013 and then running a dynamic simulation on an assembly consisting of those parts.
View 4 Replies View RelatedI'd like to know how inventor defines the center of rotation when you apply moment load on multiple faces at once. I'm not basically able to define where exactly I need that axis to be. and I dont understand where inventor assumes that axis is. if you take a look at attached model, obviously the resultant forces caused by the applied moment are bigger on the single pillar located on the extention, thats why its been displaced more than the others, but where exactly is center of rotation. I'm trying to avoid modeling of the section above this which technically transfers the moment thorough shear pins on the structure I have modeled.
View 5 Replies View RelatedIs there a way to export properties such as Moment of inertial to Partlist or use it as a customer property?
IV10 Pro. SP2
Window XP Pro sp2
Pentium 3.2 Ghz, 3.0 GB of RAM
NVIDIA FX 3400 7.1.8.4
I would like to know whether it is possible (and how) to trim a wall that was generated from mass face to a roof (also generated from face mass) or/and make a horizontal hole in it. The wall itself is not straight or curved, it shifts outwards from the building from base to top (still in an elevation it looks like rectangle).
View 2 Replies View RelatedI am not able to convert a 2d gear to 3d gear . I have attached the 2d gear that i had created. I use Autocad student version 2012 . The gear is not getting converted into a complete solid on use of extrusion command . There are gaps in within the gear around the circle or something like that .
View 7 Replies View RelatedI am trying to add a rib into a drawing I am doing for school; however, when I attempt this the drawing will not make the rib. I have attached a file of the original drawing and my own version in Inventor.
View 3 Replies View RelatedSomeone sent me a differential gear box assembly for my students to experiment with in Dynamic Simulation.It was part of a discussion on example files for students, but now I can't find the thread and don't recall who sent me these files.
In any case, we found a serious problem in one of the files.Ring mount2.ipt Sketch11 there is an arc that centerpoint should be same as projected Origin Center Point, but it is not.It is actually at the midpoint of a projected line that is very close to the origin, but not at the origin.
With the common knowledge of Inventor having a Spur gear generator, please I need calling that Spur gear generator from my API. Note that I am using VB for the programming and I have use Try and Catch for linking my API to the inventor. So on starting debugging my API, Inventor starts just as the example in the my first pluggin.
The Only thing remaining is to link my API to the Spur Gear Generator.
I need to create planetary gear. Where should i start? I tried assembly with spur gear, but half of the times program crashes. when gears are made, they don't match.
View 1 Replies View RelatedI need an ipart for helical gear.
View 9 Replies View RelatedHow to make a Gear in autodesk?
View 4 Replies View RelatedI am working on a project which uses two gear reducers. I have built the gear reducer and saved it as an assembly file so to import it to the assembly of the project. When i import the reducer assembly into the project assembly, the reducer is shown as a single piece, not as a mechanism which i can interact with. But if i select, by doubleclicking, the reducer, it becomes active again. The problem is that i want to connect the reducer to another gear assembly and watch it interact.
View 7 Replies View Relatedthe .iam assembly and the .ipt parts are to follow.I'm not very concerned with the teeth meshing properly at this stage. I just want to get the rotational constraints correct first. There are two situations that I am trying to work out, and I think I took care of the first one.
Situation 1: Blue carrier is grounded.
Input: Rotate purple sun gear.
Result: red planets turn the orange planets which turn the green sun(green sun to purple sun ratio = 1:1 but in the opposite direction)
Situation 2: Purple sun is grounded (Blue carrier is released)
Input: rotate the blue carrier
Result: I want the planets to still be able to rotate, and basically be driven by the purple sun which is being held. This should then drive the green sun to rotate in the same direction as the blue carrier gears.
The issue here is clearly that the red planets will not rotate since the purple sun is grounded. What should the constraints be instead of a simple rotational motion constraint? In a perfect world, I would like to not have to ground the purple sun, and only have the purple sun rotate when I specifically rotate it. The main input to this system is rotating the blue carrier gear. The purple sun is simply a control/variant.
I'm desperately trying to model a planetary gear set.I've tried using the gear design accelerator but with little success. Essentially, I would like to have the gears set up with the planet carrier held stationary and the ring and sun gears rotating in opposite directions: URL....The first 5 seconds of this video indicate what I'm after.
I know all of the gear data, but am having trouble generating the gear set.
I am trying to create a simulation in which a shaft rotates and the a spur gear attached to the other end rotates with it. When I apply torque to shaft, the shaft does rotate but the gear does not. I believe I have done something wrong with the constraints.
View 1 Replies View RelatedI am looking to generate a planetary gear arrangement similar to the picture attached. I am looking for a 6:1 ratio between the outer sput gear and the inner sun gear.
View 9 Replies View RelatedI have tried in vain to construct a planetary gear train in Inventor 2011 & the spur gear generator hasn't work much since the results are far from good, I have problems getting all the gears to fit together. The Internal gear has a diametrical pitch of d=120mm & the smallest gear a diametrical pitch of d=20mm, the outcome should produce a 6:1 gear ratio. The 3 other gears only offer stabillity, but I still need to know how I get it all to fit together with my measurements?
View 9 Replies View RelatedWhen showing a gear in an inventor drawing they look good, but showing a helical gear SUCKS! The display, I realize, is very realistic to what you would see if you held the gear in front of you at this view point or that.
Problem is, I put a helical gear drawing on the shop floor and they machinist wonder why I have two rows of teeth on the gear (since it shows the front face and the helix'd gear teeth).
Any way to remove said offending gear teeth?
Inventor 2014 PDS
I am currently working in IV2012 and have a need to design Recess Action Gears. We have been doing this for years with a DOS based program but this is getting harder to use as technology advances.
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