super long actively dampened high precision robotic arm.

I would like to make a huge 3d printer with cheap parts.

From discussions with people, the main problem is knowing where the robot is at any given time.

Then, because I want to control where the resin-extrusion-head is at all times, I have to make appropriate feedback loops...

I have to make the counter movements be very quick-- I was thinking about predicting vibrations and movement related twists and complexities.

I could do this with many strain gauges, and possibly piezo crystal sensors.

I was thinking that machine learning could help me adjust the feedback loops. From some discussions at maker spaces,  It sounds like this might not be neccessary.