64
XYZ Machine Tools
ProTURN SLX 1630 ProtoTRAK SLX CNC Safety, Installation, Service & Parts List Manual
5.1.13 Z-Axis Ball Screw Removal
(see Figure 17)
1.
Unplug or remove all power from the lathe.
2.
The Z-axis ball screw is attached to the lathe in three places:
a.
The left end where the Z-axis motor, the pulley, the clamp and the pair of
angular contact bearings are mounted.
b.
Behind the apron assembly where the ball nut is attached to the yoke and
the oil line is located.
c.
The right end where the floating bearing is located.
3.
Access to the left end is gained by removing the sheet metal panel below the
headstock nameplate.
4.
Access to the ball nut and the yoke is gained by removing the apron assembly.
5.
For easy assess to the ball screw, remove the ball screw cover.
5.1.14 Align Z-Axis Ball Screw Assembly
(See Figure 17)
1.
Recheck machine level. Adjust as necessary.
2.
Move carriage to middle of travel.
3.
Loosen headstock bearing housing and mounting bracket and loosen tailstock
bearing housing.
4.
Snug but do not tighten the yoke mounting bolts.
5.
Move the ball screw manually and move the carriage to the tail stock end.
6.
Tighten the yoke, this will align it vertically.
7.
Tighten the tailstock bearing housing.
8.
Loosen the yoke and retighten to realign ball horizontally.
9.
Using a socket extension, move the carriage to the headstock.
10.
Tighten the Z-axis housing.
11.
Tighten the bearing housing.
12.
Turn the ball screw manually with the socket extension and move the carriage to
the middle of the travel.
13.
Loosen the yoke mounting bolts to readjust the apron plate after the bearings
have been tightened.
14.
Retighten the yoke.
15.
Move the ball screw manually and move the carriage through the entire length
of the Z-axis. Pay special attention to the areas near the headstock, tailstock,
and in the middle of the travel. If there is any binding or rough spots, the
alignment procedure must be repeated. The axis should feel equally free
throughout the entire range.
16.
Using a torque wrench, measure the torque to move the z-axis at each end, and in
the middle of the axis travel. The torque reading should be a maximum of 1.1 - 1.7
N-m.
