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PM-1030V v5 2020-10 Copyright © 2020 Quality Machine Tools, LLC
DRIVE SYSTEM
Two-speed pulleys and a Vee belt connect the high-torque dc
motor direct to the spindle, Figure 3-1. The high speed cou-
pling illustrated gives spindle speeds from 100 to 2000. To
change the coupling for lower speeds, 50 to 1000 rpm, transfer
the belt from larger to smaller on the motor pulley. Do this by
hand-rolling the belt out of the larger diameter groove, fol-
lowed by similar action — in reverse — on the other pulley.
If necessary, adjust belt tension by moving the motor (four hex
head screws, arrowed in Figure 3-1). Firm gure pressure mid-
way between the pulleys should deect the belt about 1/4” —
no tighter than that.
Many users will nd that the low range is suitable for much of
their work, so there is rarely a need to recongure the drive.
MOTOR CONTROL
To operate the lathe, rst select F (Forward) or R (Reverse),
then press the GREEN button, Figure 3-2. To stop the motor
press the RED button.
Speed display (tachometer)
Figure 3-3
This is a 4-digit LCD that continuously monitors spindle speed
in revolutions per minute (rpm). The tachometer display
should light when power is on.
Section 3 USING THE LATHE
The PM-1022V and PM-1030V are conventional engine lathes
that require little explanation except for specic details —
speed control, thread cutting, and the saddle/cross-slide pow-
er feed system. Because the user is assumed to be familiar
with general purpose metal lathes, this section contains very
little tutorial.
Those unfamiliar with lathe work may nd the following helpful:
HOW TO RUN A LATHE, published many years ago by the
original South Bend Machine Works (not the current owners
of the brand), with many revisions through the 1960s. This is
the classic go-to source for lathe users of every level of ex-
perience.
Figure 3-1 Vee belt and pulleys
Figure 3-2 Motor controls & tachometer
Spindle direction switch: F = Forward (counter-clockwise, as viewed
from the tailstock); O = O, power disconnected; R = Reverse (clock-
wise, viewed from tailstock). Push buttons: motor ON, GREEN (I) but-
ton; motor OFF, RED (O) button.
Speed control
Figure 3-3
This is a potentiometer. Set it fully counter-clockwise for min-
imum speed.
Unexpected problems? Motor doesn't run?
See FAQs, page 2
?
Switching from F to R, or vice versa, shuts o the motor.
Safety switch
Figure 3-1
The lathe will not function unless the external gear cover is
closed.
Emergency Stop button
Figure 3-2
Slap the E-Stop button with the palm of the hand to disconnect
power instantly. The button pops out when twisted clockwise
a few degrees. This restores power, but does not activate the
motor.
Figure 3-3 Spindle speed control & tachometer
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