Need a Inventor challenge!
@Anonymous
Not sure how well this will work for you.. But I pulled this out (attached image) from my technical (board) drafting book. I'm not going to comment how long ago when I used this book to learn board drafting.. 
Mark Lancaster
& Autodesk Services MarketPlace Provider
Autodesk Inventor Certified Professional & not an Autodesk Employee
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If you can't come up with ideas, then look around your room. Your desk lamp, desk, chair, table would be good simple starters. After that, what are your hobbies, mountain bike, long board...smart phone.
Pull out your calipers and start on a disc brake calipers and rotors.
Inventor 2020, In-Cad, Simulation Mechanical
Just insert the picture rather than attaching it as a file
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Delta Tau Chi ΔΤΧ
I will share as long as there's no comparison how old the book is to my age... Meaning the book release was about 1 yr old when I got it new in college where I was taking CAD/CAM
https://www.amazon.com/Technical-Drawing-Computer-Graphics-7th/dp/002342690X
The title (on the book I have) has also the wording of "With Computer Graphics".. Some days you just have to go back and look at the old drafting room images and large computer setups that are shown in this book. 
Mark Lancaster
& Autodesk Services MarketPlace Provider
Autodesk Inventor Certified Professional & not an Autodesk Employee
Likes is much appreciated if the information I have shared is helpful to you and/or others
Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.
@PaulMunford wrote:
Would you mind sharing which book it's from? ....
Hey Paul, get the latest edition (15th) and I'll sign it for you.
Technical Drafting, Giesecke, et al.
@Anonymous
I recommend that you attach each part here as you complete it (and do 2D detail drawing of each).
I will comment on your techniques and offer suggestions.
If you are building a model that is symmetrical, build it centered about the center point: (0,0,0) which is the intersection of the Origin Planes. You only need to create either one of the "ears" and then "Mirror" it to the other corner and then mirror the two to the other side. In this case, mirror the two that you have created to the other side using the either one of the mid-plane Origin Planes or create a new Work Plane that is in the middle of your model.
A little planning ahead can save you work down the line. I always start all my models at the Origin Plane and were ever possible always try and extrude the primary shape in both directions to have one of the Origin Planes in the middle of my model, so that it can be used just for this purpose.
Inventor 2020, In-Cad, Simulation Mechanical
Just insert the picture rather than attaching it as a file
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Delta Tau Chi ΔΤΧ
Hi,
What I always find very inspirational is the autodesk Gallery:
Thomas,
Always look for symmetry in a part and organise your design to take advantage of it. In terms of effectiveness and "robust modelling" these are the steps from good to better :
- Symmetric and equal constraints in sketches : saves you dimensions
- mirror features : saves you sketches
- mirror body : saves on all and always works
The part shown in attachment starts with one quarter of the part, mirrors once where the 2 sides are getting differenciated, mirrors finally along the symmetry axis.
Alex
I would hate to tell your teacher to get out in the real world and see how Inventor is to be used. We don't get paid to create all four lugs. Create one and mirror the other three.
1.) Plan your part before you even start your first sketch.
2.) Use the Origin Start Point: 0,0,0 (JD would be so proud of me)
3.) Always fully constrain your sketches. (JD would be so proud of me, again)
4.) When "Ever Possible" make use of extruding your primary sketch in both direction to take advantage of using one of the existing Origin Planes for Mirroring proposes.
5.) Keep your sketches as simple as possible, don't try and sketch the whole model with one sketch.
6.) If you can do the item later with a fillet or hole as a Feature do it then, don't do it in the sketch. It will be easier to fix as a Feature and easier to work with down stream in your model.
If you have the scree space, Ungroup and move up to the menu all the command. This will save you time hunting for commands in the drop-down menus.
You should forward this post on to him.
Inventor 2020, In-Cad, Simulation Mechanical
Just insert the picture rather than attaching it as a file
Did you find this reply helpful ? If so please use the Accept as Solution or Kudos button below.
Delta Tau Chi ΔΤΧ