Powermatic 3520C, Operating Instructions And Parts Manual

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3. Mount spur center with the spindle blank that
will be turned. Loosen tailstock locking handle,
and slide tailstock until live center is about 1-
inch from spindle blank, then tighten locking
handle. Advance live center using tailstock
handwheel, until live center is secured in
spindle blank.
4. Mount reference spindle between comparator
centers, as shown in Figure 8-7.
NOTE: Reference spindle should be mounted
last after all adjustment of tailstock and quill has
been accomplished with spindle blank.
Likewise, when turning operation is complete,
remove reference spindle first.
Figure 8-7: comparator
(shown with optional 20” bed extension)
8.9 Face plate: installing/removing
1. Disconnect Lathe from power source.
2. Mount face plate to your bowl blank.
3. Rotate spindle lock switch (Figure 8-8) and
rotate handwheel slightly until lock engages
with spindle.
4. Install face plate onto threads of headstock
spindle and rotate clockwise hand-tight. When
the Lathe is turned on (forward rotation), the
rotational force will snug the face plate even
farther onto the threads.
If at any time you will be
reversing spindle rotation, make sure the two
set screws in the face plate are tight! One of
these is shown in Figure 8-8. Failure to do this
may cause face plate to loosen from headstock
spindle.
5. To remove face plate, loosen the two socket set
screws (Figure 8-8). Engage spindle lock switch
and turn face plate counter-clockwise with face
plate wrench, as shown.
Figure 8-8: faceplate
8.10 Speed change
1. Disconnect Lathe from power source.
2. Pull open access door on headstock.
3. Loosen pivot lock handle (J, Figure 8-9) and lift
up tension handle (K, Figure 8-9) to raise motor.
Tighten pivot lock handle (J, Figure 8-9) to hold
motor in raised position.
4. There should be sufficient slack in belt to
reposition it to the other steps on the sheaves.
The label on the access door shows the
required belt position.
5. Loosen pivot lock handle (J, Figure 8-9) and
lower motor to tension belt. Be sure that the
Poly-V grooves of belt seat properly in the
corresponding groove of sheave. Do not
overtension; a very light pressure on the tension
handle (K, Figure 8-9) is adequate to prevent
belt slippage.
6. Tighten pivot lock handle (J, Figure 8-9).
8.11 Sheave and belt alignment
The motor and spindle sheaves are aligned by the
manufacturer, but if any service is performed that
affects their alignment it is very important that they
be realigned. To realign them, loosen the two set
screws on spindle sheave (L, Figure 8-9) with a hex
wrench, and slide spindle sheave into proper
position. Retighten set screws.
When sheaves and belt are properly aligned, there
should be no unusual pulsing sounds or noise
coming from the belt.