This is just a sketch of an idea for a self-reproducing machine on the Moon.
As fanciful as it is, every part of it is something that has been done before, just not in combination like this.
Some references:
"Lunar dustbuster" pushes regolith dust across surfaces with wave of static charges [https://science.nasa.gov/science-news/science-at-nasa/2006/19apr_dustbuster] [www.spaceflightinsider.com/missions/hawaiian-students-test-lunar-dust-buster-nasa-ames/]
Levitated induction melting (Just google "induction levitation melting" or "cold crucible") [https://www.youtube.com/watch?v=8i2OVqWo9s0] [https://fas.org/sgp/othergov/doe/lanl/lib-www/la-pubs/00418618.pdf]
Lunar regolith can be surprisingly conductive, especially when hot [https://articles.adsabs.harvard.edu//full/1971Moon....2..408S/0000408.000.html]
Electrospray ionization [https://en.wikipedia.org/wiki/Electrospray_ionization] [https://en.wikipedia.org/wiki/Liquid_metal_ion_source]
Using microwaves to convert glass to plasma [https://www.youtube.com/watch?v=cskB5c0mJ58] [https://www.sciencealert.com/did-this-piece-of-glass-really-break-a-law-of-thermodynamics]
Mass spectrometry [https://en.wikipedia.org/wiki/Mass_spectrometry]
Ion beam deposition [https://en.wikipedia.org/wiki/Ion_beam_deposition]
Plasma ion-beam 3D printing: A novel method for rapid fabrication of customized MEMS sensors [https://www.semanticscholar.org/paper/Plasma-ion-beam-3D-printing%3A-A-novel-method-for-of-Watanabe-Kinoshita/5e4e7e42e46820bf25884d3eb4d3ca0fbaf199ae]
