Checking Center Alignment; Speed Range Adjustment; Operating Controls - Jet JWL1440-TREA Operating Instructions And Parts Manual

7.14 Checking center alignment

When headstock is returned from outboard
position, the alignment between centers should be
checked.
1. Lock headstock in normal spindle turning
position.
2. Slide tailstock toward headstock until centers
almost touch (see Figure 7-12). Lock tailstock
in position.
Figure 7-12: center alignment
3. View the center points from top and side to
make sure they align.
4. If centers do not align, unlock headstock and
pivot it slightly. There should be enough "play"
in headstock to adjust for this alignment. Lock
headstock when finished.

7.15 Speed Range Adjustment

See Figure 7-13.
1. Disconnect lathe from power source.
2. To change speed range, open access door on
headstock.
3. Loosen pivot lock handle (A, Figure 7-13) and
lift up tension handle (B) to raise motor.
Tighten pivot lock handle (A) to hold motor in
raised position.
4. There should be sufficient slack in the belt to
reposition it to the other steps on the sheaves.
The label on access door shows required belt
position (also shown in Figure 7-14).
5. Loosen pivot lock handle (A) and lower motor
to tension belt. Be sure that Poly-V grooves of
belt seat properly in corresponding groove of
sheave. Do not over-tension; a very light
pressure on tension handle (B) is adequate to
prevent belt slippage.
6. Tighten pivot lock handle (A) and close access
door.
Figure 7-13: speed range adjustment

8.0 Operating controls

See Figures 8-1,8-2.
On/off switch (C): Pull to start lathe, push to stop.
The safety key (C
unauthorized use of lathe. The safety key must be
inserted to restart the lathe.
Note: If a power outage occurs during operation,
the lathe will not immediately restart when power
resumes. Cycle the ON switch to restart.
Remote switch: The remote emergency stop
switch (or E-stop) has a magnetic base, and can
be positioned on any metal surface of the lathe.
When remote switch is pushed, cycle the ON
switch on headstock to restart lathe.
14
Figure 7-14
) can be removed to prevent
1