I believe that the sensor wires on the Goliath only provide feedback on where the Goliath “is” on the cutting board. The driven movement of the Goliath comes from the drive on the triple sets of wheels. Getting feedback on the exact location makes the control a “closed loop control system”. The wheels are told where to go, the wires give feed back where it is, the control corrects the wheels for any slip or mis-location.
Here is a excerpt from one of their communications:
Goliath CNC positioning system
During the campaign, we showed you our sensor system necessary to triangulate the position of the robot and define the work area. The sensors you saw were prototypes, and what we did in these weeks is make them a fully finished, working and accurate product.
The main job has been redesigning the mechanical system inside the sensor to increase the accuracy of the wire length measurement. We cannot show the details for patent reasons, but we can say that we enhanced wire winding system and the electronic components.
We run some tests, and the results were great: with the old internal configuration of the sensor, we registered an error of 30 mm on a distance traveled of 300 meters, thanks to the redesign of the wire winding system you can see that the error registered is today between 0 and 0,1 mm .
Here the old and new sensors’ configurations compared
After this validation, we are now redesigning the sensor to give it a better usability and manufacturability . Here some sketches and mock-up of the design both of the sensors and their basement. We will give you more details soon!
The next few weeks will be full of news about both the software and the wheels . Regarding the software, we will meet a potential partner with a strong experience in the CAD/CAM software for the woodworking industry, which is very interested in support Goliath CNC project. And the new design of the wheels is going to be prototyped in the next days!
We really cannot express how excited we are to see every part of Goliath CNC taking shape, and we cannot wait to share everything with you!
End of excerpt.
So for what its worth, I do not think it is a dead project, but rather a complicated one taking a while to get commercialized. Looks like they have made SIGNIFICANT progress with the sensors, even applying for some patents.
I waited an extra year for the Shaper Origin, and even at release it did not have all of the software features promised/shown at shows. Now just 9 months later it has had multiple software upgrades and is a very useful and easy to use and precise and accurate tool. I just don’t like to use it to cut large sheets down as I don’t like hanging on to it that long.