First video of the CAT 390F 3d printed excavator with electric motors for drive, boom and bucket controls.

Fully electric, uses 7 servos, 1 servo for each motor:
- 2 for tracks, which are driven by 2 JGY-370@40 RPM worm gear motors
- 1 for superstructure rotation, uses a JGY-370@25 RPM worm gear motors
- 3 for boom, arm and bucket, each use JGB37-550 DC gear motor
- 1 for bucket coupler, which is a GA1024-N20@60rpm gear motor

All 3d printed except nuts, bolts, springs and lead screws. I also added some lead weights in the back so it won't fall over, filling with sand wasn't heavy enough.
Connection between undercarriage and superstructure is done using a slew bearing with rollers, also fully 3d printed.

Materials used:
- tracks (track elements body, rollers, wheels) , slew bearing, superstructure base, arms and bucket (includes links): PETG
- superstructure elements like cabin, motor housing: PLA
- arm/bucket cylinders: ABS

Still have some tinkering to do here and there, but I will post a new video soon and when completed I will also make available the STL files.