Ask HN: PLz help in thus; 3Dprint pendulum only prints when knows its position

https://www.youtube.com/watch?v=uPbzhxYTioM So, a 3D printer on a pendulum-wire that only 'prints' when in the spot to print at... Filament printers wont work due to the heated-cohesion needed in the threads printed.. But a sand-like-thing + epoxy-like thing could result in the expression of the agent in any pattern as long as the pendulum is managed... The pendulum IS the printing head, and using orbital mechanic math or some such can be used to predict when to print, etc... (You get it) but the simplicity in this is that you have a standard struct, a pyramid of supports, and a mech to affect the height of pyrmid, and rotation of pendulum printer head at minimal cost of energy.... You have a motor with a small solar input... But you have an external engine that supplies the resources to the printer... The printer is easily scalable in size... but requires a lot of energy on the outside to produce... But you feed it plans, and it will squirt out the shape, as long as it fits under it's struts that house the pendulum... So as long as you can slurp "earthen" (or martian" soiled content into the system and keep the pendulum spinning... it can print....