sketch geometry is over constrained

[Anonymous]

Why cant i make a simple sketch measurement on a box with filet edges and corners? 

i get the error -sketch geometry is over constrained
Same for some circles i draw on the box, some can give me some information...

[Anonymous]

morroklump, please post your *.f3d file and/or make a screencast. I've been having a heck of a time with over constrained sketches but sometimes it is user error. These guys will want to see it. 🙂

[Anonymous]

This is my first Fusion drawing ever, so i may be doing something wrong. I followed the autodesk 360 fusion youtube tutorial, but this got me stuck.

Wasnt able to use the attachments, so here is a dropbox dl link.
https://www.dropbox.com/s/uetn16fnb6cnta1/Somethingsomething.f3d?dl=0

[dan.banach]

Hi Morroklum,

Are you using the Measure command or the Sketch Dimension command? To dimension to edges that are NOT on the current sketch plane, you can copy them to the current sketch by using the Project command. To project geometry click on the Sketch tab > Project / Include > Project command and then select the geometry. If this does not help, could you post a screen capture that shows the geometry you are selecting, and the error message that you are receiving?

Thanks for the added information.

-Dan

[Anonymous]

Im useing the sketch dimension tool. 

I've tried the project command, but without succes, am i doing it wrong? 
Selecting the tool > selecting the plane > useing the selection filter "bodies" > clicking my body > This gives me a new sketch plane. 

Then i selected the sketch plane and and useing my sketch dimension tool i select the top and the bottom of the box, and move my cursor to where i want the information. Still error. 
Attached screenshot to show what happenes. 

The real dimension of the box should be 575mm from top to bot, not 615 as the screenshot says,  and i figured useing the dimension sketch tool and changeing the value would be the easyist way to resize my box. 

[dan.banach]

Hi Morroklump,

Thanks for posting the screen shot. It looks like you may be dimensioning the projected geometry, projected geometry is associated to the original geometry. Tale a look at the Screencast I created for you: http://autode.sk/1H8RAtP

I created a new sketch, drew a circle, projected geometry (an edge and an origin centerline), added a dimension to the projected edge, and added a coincident constraint that positions the circle on the Y axis. Hope this helps,

-Dan 

[Anonymous]

Great screencast, i got this to work for the simple circle. But not for the whole box. How do i resize the box with this tool?
I crated it as 575 in heigh, but as you can see its 615, i think this happened after useing the filet. 

Also how do you center the circle, just by pressing the line, i only get to select it.

[dan.banach]

Hi Morroklump,

To lengthen the box you can use Fusion's Direct Editing functionality.

1. Select the top planar face.

2. Right-click and click Press Pull from the marking menu.

3. You can either click and drag on the arrow or enter a new value as shown in the image.

I centered the circle by projecting the Y axis from the Origin folder and then applying a Coincident constraint between the center point of the circle and the projected line.

Hope this helps. - Dan

 

Hope this helps,

Dan

[JamieGilchrist · Accepted solution]

Hi morroklump,  welcome to Fusion and nice first model.  Dan's receommendation is completely correct, based on the way you created this model.  I'll break down what you did.

the main volume of the box you created using a primitive.

 this gives you a very fast way to build form and explore ideas, however, it's not the best method if you want to control your design.  

the method you went trough to create the speaker shape is really where you should start if you know you want to control your design.

steps worth trying

start with a sketch of the main shape, you can dimension this and add the main features in this sketch as well, speaker holes/location, ports. connector locations, etc.

 best practice:  keep your sketches as simple as possible, stay away from adding fillets or secondary level of detail that will need to be added to your model

Create the main extrusion

now you can go through and add the remaining features using new sketch + project (from your original sketch)

good luck and we're happy to answer other questions to help get up and running

I've added this into the model you posted.  have a look at what I started and you'll be on your way, because you've got the generaly prinicples, just need to put them together a little differently

[Anonymous]

Fantastic help guys! 
With your method Dan, how do i change the "origin point" for the press pull. If i try to use the tool it measures from the middle of the box, instead of the bottom. 

Great attachment gilchrj, it made me finish my speaker with much less trouble. I'll try to make my own now, and add some details on the sites aswell. I'll report back if i need further help, untill then, thank you!

[Anonymous]

Fantastic help guys! 
With your method Dan, how do i change the "origin point" for the press pull. If i try to use the tool it measures from the middle of the box, instead of the bottom. 

Great attachment j. , it made me finish my speaker with much less trouble. I'll try to make my own now, and add some details on the sites aswell. I'll report back if i need further help, untill then, thank you!

[dan.banach]

Hi Morroklump,

When I edit Extrude6, it shows that you extruded it up from the middle of the part. A best practice would be to model with your design intent in mind, in this case a single box / extrude that represents the entire speaker case would have given you the result to want.

Thanks, - Dan