This project is a tracked robot chassis to carry a ZEB1 Lidar scanner (see http://www.beckengineering.com.au/?page_id=2441). The rover comprises a lighter weight but heavier duty chassis, motors, motor mounts, drive wheel and suspension for the tracks and swing arms off the Dagu T'Rex and a mounting arm, including oscillating mount for the ZEB1.

You can see a movie of it with ZEB1 mounted, scanning a house here:

https://youtu.be/p9bI1B1qdbc

Videos of it without the oscillating mount here:

https://youtu.be/_8VQwqkNp9o

The replacement chassis accommodates upgraded motors. The drive sprocket and gear boxes are replaced and helper springs increase the cargo capacity. The sprocket has also been re-sized to properly engage with the tracks and is sized to fit a popular and available 12V metal gear motor. The design allows small adjustments to the alignment of the motors to achieve better tracking.

Using a 5000mAh LiPo battery, it will run for 30mins to 45mins.

This is the additional hardware:

02 x MEC-30148 : 131:1 Metal Gearmotor 37D x 57L mm (12V)
02 x MEC-30182 : Pololu Universal Aluminum Mounting Hub for 6mm Shaft M3 Holes
Aluminium RHS - See rhino file for details. I include a drilling tenmplate to facilitate attachment of the T'Rex suspension components to the RHS.
assorted screws, nuts, washers
4x100mm RC Car springs

You will also need the drilling guide and suspension spacer from http://www.thingiverse.com/thing:996812
These are used to attach the helper springs to the swing arms.
This original project was supposed to be a sufficient upgrade to allow the DaguT'Rex to carry more load, but the motors/gearboxes weren't sufficient, hence this more comprehensive re-build