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XYZ Machine Tools
ProTURN SLX 1630 ProtoTRAK SLX CNC Safety, Installation, Service & Parts List Manual
rear of the headstock, (See Figure 18) adjust the headstock position in the direction
necessary to remove the taper. Note that the headstock will pivot about a pin
located between the two front attaching screws. Tighten the attaching screws and
test for taper.
Figure 18
Headstock Alignment
5.1.16 Spindle Bearing Preload
1.
Run the lathe for 10 minutes to ensure the bearings are lubricated and slightly
warmed. Run the lathe at 500 RPM.
2.
For the SLX 1630 you will need to remove the spindle motor belt because this
machine does not have a neutral. Using the torque wrench, measure the spindle
rolling torque. The acceptable range of rolling torque is around 1.1 – 1.7 N-m.
Note that the torque required to start (“breaking away torque”) the spindles
rotation will be higher.
3.
Loosen the three setscrews on the spindle-adjusting nut. The spindle-adjusting
nut on the SLX 1630 is outside the gearbox so the headstock access cover will
not need to be removed.
4.
Torque too low: With a spanner wrench tighten the adjusting nut. Measure the
rolling torque and repeat until 1.1 – 1.7 N-m. of rolling torque is achieved.
Tighten the three setscrews to retain the adjustment.
5.
Torque too high: With a spanner wrench loosen the adjusting nut two full turns.
Place an aluminum block over the end of the spindle and with a hammer drive
the spindle forward until it is loose. (Near zero rolling torque) With a spanner
wrench tighten the adjusting nut. Return the speed selection lever to the neutral
position. Measure the rolling torque and repeat until 1.1 – 1.7 N-m. of rolling
torque is achieved. Tighten the three setscrews to retain the adjustment.
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