Learn Fusion 360 in 90 Minutes Course Question

[stephantassel]

Hi all,

Beginner here trying to start through some of the Autodesk beginners courses. I'm currently trying to finish up the 'Learn Fusion 360 in 90 Minutes' course. All has gone well but I'm stuck on the 'challenge exercise' which doesn't provide any material to refer to. 

I'm supposed to recreate a tea kettle lid and all has gone well up until this point. In the sample file, when I review the sketch in the timeline, I can see that the small circle has been placed with its center 7mm from the perimeter of a larger circle which has a purple line. That interior smaller radius circle has a dashed line. I've been searching and trying different things for over two hours and I can't figure out how to accomplish this. I'm guessing that that this was done in order to aid in placing the small circle's center 7 mm in from the perimeter of the larger circular feature. 

Please find attached a screenshot of the course file indicating what it is I'm trying to re-create. Any help would be greatly appreciated; I'm sure I must be missing something very simple. Thank you in advance for helping a beginner out.

[mango.freund]

hello my friend, unfortunately you do not enter the course as an internet address. I can't see what is to be achieved in photos. give us your work or at least the internet address of the course. thank you - mango

[TheCADWhisperer]

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@stephantassel wrote:

1. I'm currently trying to finish up the 'Learn Fusion 360 in 90 Minutes' course. 

2. Please find attached a screenshot...

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1. What is the link to the course?

1b.  It is not possible to learn Fusion 360 in 90 minutes.

2. Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

[stephantassel]

Hi,

I appreciate the quick reply. I'm not sure if you're just being facetious but I do know that you obviously can't learn Fusion 360 in 90 minutes; I have a twenty-five year background in 2D design software and I am trying to get started in Fusion through Autodesk's offerings. This is one of those courses and the beginning of what will surely be a lengthy years-long process, that may or may not pivot to institutional-based training. But . . I have to start somewhere, no? 

Here is the link to the course. I am near the end doing the 'course challenge' exercise of designing the tea kettle lid and knob from scratch, and no guidance. Below, is a screenshot with the courses sample object on top, and then my recreation of the object on the bottom. You can see in the shot on the left, that the small 3.5mm diameter circle (indicated by a blue arrow) is placed with it's center 7mm in from the perimeter of a larger circular feature (as well as at the center of the annulus formed by the two concentric circles, which is marked by a dashed line circle) On the right, you can see that I've recreated the lid and have sketched the small circle:

However, I can't figure out how to use the tools in order to recreate what I see in the sample file. I believe what was done (and please excuse me if this is incorrect . . I'm doing my best) is that the dashed line circle is a 'construction line' that was used in order to help with the placement of the small 3.5mm circle, to ensure it was centered in the annulus formed by the two concentric circles. 

I just can't figure out how this was done, and more specifically

1. How the purple lined circle comes into play (marked with a red arrow in the top screenshot)?

2. How the 7mm measurement from the purple circle (marked with a red arrow in the top screenshot) was done?

3. How the dashed line circle (construction line?) was created (also marked with a red arrow in top screen shot)?

I've also attached the files in question. Again, I really do appreciate the help. The intent of my taking this course is 'introductory' in nature and but a small piece of a first few steps into the world of Fusion 360 for me. Thank you!

Best,

Stephan

[stephantassel]

Hi Mango,

Thank you for the quick and kind reply; apologies for not including that-- I'll know to always include that in the future! Please find a new reply from me in the thread above which I made to a different user which includes a link to the course as well as the course file and a file containing my own attempt. If you require anything else, please do let me know. I truly appreciate any help on this.

Warm regards,

Stephan

[wmhazzard]

The purple line is a projected arc from the body, the dashed circle is a construction line. In the sketch, type P for project and select the outside of the fillet and click OK. Then I assume that you are supposed to make an offset circle from the projected arc to get the location of the small circle. You can turn the offset into a construction line by clicking on the line to highlight it and then type X to make it construction. 

[TheCADWhisperer]

In addition to @wmhazzard instructions, add a Vertical constraint between the center off the small circle and the center of the construction circle.  The small circle should now be fully defined in size and location.

( I didn’t look at your files yet, so my instructions might be a bit off.)

[laughingcreek]

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@stephantassel wrote:...

...1. How the purple lined circle comes into play (marked with a red arrow in the top screenshot).... shot)?

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purple lines in sketches are projections from other geometry.  there are several types of projections available in the sketch menu, all very useful.  this is the one used here.  it was projected from the edge of the fillet-

(I personally take issue with spacing the hole x units from the edge of the fillet.  how would you measure that IRL?  surpirse AD is doing this in a tutorial, not a good practice)

...2. How the 7mm measurement from the purple circle (marked with a red arrow in the top screenshot) was done?...

draw the circle, place a dim.  when you need to force the dimension tool to measure from a tangent of a circle instead of the center, right click and select arc/tangent right before selecting the circle-

...3. How the dashed line circle (construction line?) was created (also marked with a red arrow in top screen shot)?..

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just a construction line.  either activate construction line toggle before drawing circle, or select the circle (so it's high-lighter) after drawing it and then select the construction line toggle.

[mango.freund]

https://www.youtube.com/results?search_query=44+fusion+360+tipps

[whittakerdw · Accepted solution]

Hopefully this will help you.

https://knowledge.autodesk.com/community/screencast/c880b70b-015c-4cd8-b125-caf3037ba1c0

I thought it would capture the keyboard commands, but after offsetting a plane, I used the project command, or P key to project the outside circle onto the new plane. I then pressed x to turn the lines into a construction line for the circle that is offset by 14 mm.

[stephantassel]

Thank you so much for the detailed instruction and screenshots! This really helped me understand projections and construction lines. I really appreciate it!

[stephantassel]

Thank you SO much for this-- this was incredibly helpful; exactly what I needed to understand what was going on. I actually realized in following your steps and exploring the associated tools exactly how the original author of the example file did part of it which was using the 'offset tool'. So, even though you went a slightly different route, it was your screencast and help that helped me understand a lot about using these few tools. I can't thank you enough! 

Cheers,

S.