Precision matthews PM-1440GS, Руководство пользователя

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Copyright © 2020 Quality Machine Tools, LLC PM-1440GS v3 2020-10
SPINDLE SPEEDS
The PM-1440GS has an eight-speed headstock gearbox with
two shift levers, L-H & Speed Selection, Figure 3-1. Before
changing speed, use the Motor Control lever to
STOP THE
MOTOR , then move the shift levers to the desired setting. This
may need a little patience because it is not always possible to
go directly from one mesh to another. Move the spindle back
and forth by hand while trying to ease the lever into its detent
(meshed) position.
Don’t use the JOG button in this pro-
cess — this may cause gear damage.
Figure 3-4 Motor attachment bolts
CHUCKS & FACEPLATE
The spindle nose on the PM-1440GS accepts D1-5 Camlock
chucks, faceplates and other work holding devices.
A D1-5 chuck or faceplate is held by six threaded studs, each
with a D-shape crosscut to engage a corresponding cam in
the spindle nose, Figures 3-5, 3-6. The function of the cams is
to pull the chuck backplate inward to locate its internal taper
firmly on the spindle nose.
Figure 3-6 Camlock stud
TO INSTALL A CHUCK
Disconnect the 220V supply from the lathe!
D1-5 chucks and faceplates are heavy, some more than 30
lb. They will cause serious damage if allowed to fall. Even if a
chuck is light enough to be supported by one hand, the lathe
bed should be protected by a wood scrap, as Figure 3-7. Some
users add packing pieces, even custom-made cradles, to as-
sist “straight line” installation and removal.
Before installing make certain that the mating surfaces of the
chuck/faceplate and spindle are free of grit and chips .
The cams on the spindle are turned with a square-tip wrench
similar to the chuck key (may be same tool in some cases).
Recommended procedure:
1. Select the highest spindle speed (1150 rpm) to allow easier
hand rotation of the spindle. (Alternatively, try moving the
speed selection levers between detents to find a “between
teeth” condition to disengage the gear train.)
CARRIAGE FEED DIRECTION
The lever below the speed selectors on the front panel, Figure
3-1, determines whether the saddle feed is right to left — the
usual direction for turning and thread cutting — or reversed.
The selected direction applies to both the leadscrew and the
saddle/cross slide power feed.
Before changing feed direction, STOP THE MOTOR . Hand-
turn (jiggle) the spindle while feeling for the mesh, as above.
To disengage the power feed, set the Saddle Feed lever to its
mid-position.
SPINDLE SPEED (RPM)
H RANGE 1150 1800 690 420
L RANGE 170 265 100 60
Alongside each stud is a stop screw, the head of which fits
closely in a groove at the threaded end of the stud. The func-
tion of the stop screw is not to clamp the stud in place, but
instead to prevent it from being unscrewed when the chuck is
out on the bench.
Figure 3-5 D1-5 faceplate
All stop screws must be present & fully tightened!
Camlock action can jam any stud lacking a stop
screw — a serious problem.