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]