Quote:
Originally posted by Gadget470
I did post-production drafting of the entire robot (as it was being built). We didn't have any CAD models to work off, we had hand sketches. Being that we used extruded aluminum, we safeguarded just about everything by making sure it's function could be slid a few inches an whatever direction to work right. Our only problem? Our Tape Measure said 36".. FIRST's said "36 1/4".. Answer: Portable bandsaw.
Calculations were done mostly for our gearbox and finding a desired Torque vs Speed since we did not shift gears. Past that, finding the correct point to mount our pnuematics for our 15lb downward dropping wings to fall to a horizontal and still be able to come back up.
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Hand Sketches are still considered drafting if they have numbers on them. Just as long as you include dimensions of how long a part is supposed to be, it doesn't matter how it looks freehand. If you have a circle cut out of an aluminum plate, you should have the length, width, distance of the circle center from the corner (x,y), and the radius of the circle. If you had those 4 things, a machine shop could replicate that part. I'd consider that extreme, but only if the entire robot was drawn up.