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Exercise 4: Sketching the Drivetrain Frame

Final Frame.

Video: Watch on YouTube

Building the Frame

Now that you’ve sketched individual parts, it's time to create a full drivetrain frame.

Your goal is to sketch and extrude the rectangles shown below, then tube them using the Tube Converter.

Make sure to mirror your sketches using construction lines — don't manually draw both sides.

Drivetrain sketch

Important Notes

Common mistakes to avoid

  • Make sure to mirror across both X and Y axes.
  • Avoid overdimensioning your sketches — use symmetry whenever possible.
  • Make sure the cross beams are also mirrored properly.
  • Use the origin as the center reference point for everything.

If your sketch is fully constrained (everything turns black), you’re doing it right!


Extruding the Frame

Once your sketch is complete, extrude and tube convert into your drivetrain, like usual.

After

  • Add your cross rails from the last exercise, then it is complete.

Checking Your Frame

  • Double-check that no parts are fused together incorrectly.
  • Use the cube and dot (origin and ground) to verify alignment.
  • Make sure tubes line up properly with the module placements.

When You're Ready

Continue to Exercise 5