I had some little difficulty getting the Square to charge when I first rebuilt her but eventually found that applying 400 grit wet and dry paper to the commutator solved the problem. It was a new armature / electronic regulator / wiring / etc. but clearly, I wasn't getting enough output to get the whole thing going. Since the initial problems, no trouble whatsoever.
36 4G, 37 VH, 54 KH(A), 75 Healey 1000/4, 52/53 ex ISDT KHA (project).
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist once more - but not Machine Registrar.