LATHE ALIGNMENT (part 1 )
With the lathe installed and running, we recommed a check
on machine alignment before commencing work. Check levelling
and machine aiignment at regular periods to ensure continued
lathe accuracy.
Headstock check: Take a light cut-with a keen tool over a
6 in. (150mm.) length of 2 in. dia. (50mm.) steel bar gripped
in the chuck but not supported at the free end. Micrometer
readings at each end of the turned length (at A 2nd B of Fig
19) should be the same.
To correct a difference in readings, slacken and release
the four headstock hold-down screws (J) shown in Fig 19 and
adjust the set-over pad (K) beneath the headstock. Then tighten
all screws. After adjustment, repeat the test-cut/micrometer reading
until micrometer readings are identical so that
machine cutting will be absolutely parallel.