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To remove leadscrew end play
1. Disconnect Machine from power.
2. Loosen set screw several turns. Fig. 31
3. Tighten retaining nut with your fi ngers so
it just contacts end bracket, then back
nut off 1⁄8 turn.
4. Hold nut in position and tighten set screw
against leadscrew until snug.
Gib Adjustment
To adjust cross slide and top slide gibs:
1. Disconnect Machine from power!
2. Loosen three hex nuts on side of cross
slide or compound slide. Fig. 32-33
3. Adjust all three cap screws in small and
equal increments, then test movement of
slide by rotating handwheel.
Note: Turning cap screws clockwise
tightens the gib, and turning them
counterclockwise loosens the gib.
4. When satisfi ed with gib adjustment,
use hex wrench to prevent cap screws
from moving, then retighten hex nuts to
secure the settings.
5. Recheck movement of slide. If necessary
re- peat steps 2-4.
Half Nut Adjustment
1. Disconnect Machine from power!
2. Disengage half nut.
3. Adjust gib set screws in small, even
increments so one end of gib does not
become tighter than the other. Fig. 34
4. Engage/disengage half nut several times
and notice how it feels. The adjustment
is correct when half nut fi rmly and easily
engages lead- screw while opening and
closing.
Repeat step 3-4, if necessary until satisfi ed with
feel of half nut engagement.
Fuse Replacement
This lathe features an on-board fuse designed
to blow to protect sensitive electrical parts from
thermal damage in the event of an overload.
If the spindle does not start, replace the fuse.
To replace fuse:
1. Disconnect Machine from power!
2. Unthread fuse holder by rotating counter-
clockwise and remove fuse. Fig. 35
3. Insert new fuse into fuse holder.
4. Re-install fuse holder.
Brush Replacement
1. Disconnect Machine from power!
2. Remove the three screws that secure
rear motor cover, the remove cover to
gain access to rear brush. Fig. 36
3. Unscrew rear brush cap and carefully
remove brush from motor. Fig. 37
4. Unscrew front brush cap and remove
brush from motor. Fig. 38
5. Install new brushes.
6. Re-install brush caps.
7. Replace rear motor cover.
Replacing Timing Belt
1. Disconnect Machine from power
2. Remove end cover, rear motor cover.
3. Carefully remove outer spanner nut,
speed sensor, and sensor wheel.
4. Remove side cover assembly.
5. Loosen motor mount hex nuts Fig. 40.
6. Slide off old timing belt and install the
new one, making sure that belt teeth are
seated together with pulley teeth. Fig. 41
7. Tension the timing belt.
8. Re-install side cover, sensor wheel,
speed sensor, and outer spanner nut.
9. Re-install cabinet, rear motor cover, and
end cover.
38
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