Boxford TCL , Spindle motor problem

[John11668]

So they said no fault , but they did me a deal on a 12,2 amp upgrade . (???)
Still no improvement and motor would only draw about 1.5 amps max settling down to 1.2 . I have concluded that brushes may be limiting the current input . No arcing , but brushes did not seem to be giving a "witness" over their full face width.
The brush width spans 3 comm segments so maybe only 1 in 3 being fully supplied .
Motor stripped again, segments cleaned and brushes bedded in another lathe using a jig. Then re-assembled taking care to keep the same brush orientation.
Seems better already although back to running in again, so will keep you posted .