Hey! I’m glad to hear you’re using our CAD for reference! While we don’t use any 8020 or C-channel on 7461 (due to the low strength to weight ratio as opposed to 1x1 and 2x1 box tubing), meaning our workflow probably isn’t the most suited to 8020/C-channel, I can give some advice on modeling.
For 8020, there’s a featurescript (mentioned above), and for C-Channel you can just extrude a rectangle and then use the shell tool for the sides that are “open”. Feel free to ask me if you have any questions!
Some miscellaneous ramblings:
It looks like you’re a rookie team, so I’ll just put a bit of general advice here:
- Master layout sketches are only useful if your workflow is heavily CAD-driven. If you try building your robot before you CAD it, don’t bother with anything of the sort (though I highly recommend the former)
- In general, I’d recommend moving away from C-channel and 8020, since both aren’t very robust for construction. Instead, the use of hole-patterned box tubing and metal gussets allows for really fast construction of rigid structures.
- I think that, while CADing your old robot is a great exercise for the pure mechanics of CAD, it won’t really help you with learning the workflow or actually improving at design, since you already have the robot built. Instead, what I’d do is work on designing small mechanisms (i.e., a hatch manipulator from 2019), which will give you a feel for why the layout sketch is useful, and what its actual purpose is in a CAD model.
I hope you were able to make sense of my ramblings – if you have any questions or want any help/advice, feel free to shoot me a message, and I’ll be happy to respond. Good Luck!