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PM-833TV 4-13-21V1.indd Copyright © 2021 Quality Machine Tools, LLC
Be sure to loosen the X-axis clamp
levers and Y-axis screws before moving
the table, especially under power
Figure 3-12 Y-axis clamp screws
Figure 3-13 Limit switch & stops for power assist
Adjustable L and R stop blocks, together with the limit switch assem-
bly, prevent over-travel when the table is power driven.
MOVING THE TABLE
Left-right movement of the table is said to be the X-ax-
is (a.k.a. “longitudinal” or “traverse”). Front-back move-
ment is the Y-axis, sometimes called “cross travel”.
Each axis has a micrometer collar with 0.001” divisions,
0.1” per revolution, Figure 3-11. If the mill is not equipped
with digital readouts (DROs), the table can be accurately
positioned by counting whole turns and divisions, keep-
ing leadscrew backlash in mind. This means that ta-
ble motion must always be in the same direction when
approaching the point of reference, then onward by a
specied amount to the desired location, see “X & Y axis
positioning by counting divisions”, following.
The right-hand handle on the table leadscrew disengag-
es by spring action. Push the handle in to engage.
Figure 3-14 X-axis power assist
X-AXIS POWER ASSIST
A separate manual is provided for the power assist unit,
manufactured by the ALIGN company (Taiwan), Figure
3-14.
If a power assist unit is installed on the X-axis, the han-
dle at the right-hand end of the table is disengaged from
Figure 3-11 X-axis leadscrew handle
the leadscrew by spring action.
To run the table under power:
• Check and adjust the limit stops as desired, Figure
3-13.
• Set the speed adjust knob as desired — start with a
low speed, counter clockwise.
• Switch on the power unit. The LED in the "RAPID"
push-button should light.
• Set the direction lever LEFT or RIGHT.
• Adjust the speed as desired.
• For highest speed motion, press the RAPID push-but-
ton.
If the unit draws 3 Amps or more for 10 seconds, the
overload circuit breaker will pop out, cutting power. Cor-
rect the cause of the problem, then press in the circuit
breaker to restore power.
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