XYZ Machine Tools SMX 5000 User Manual

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XYZ Machine Tools Ltd
XYZ Bed Mill Safety, Installation, Maintenance, Service & Parts List Manual
 When loosening, make sure to back out the 10-32 screw from the clamp nut.
 When tightening, snug the 10-32 screw so the clamp goes onto the ball screw thread with
some drag. Thread it onto the ball screw and torque the clamp nut to 50 ft/lbs and then
tighten the screw down.
6. For the 4000 & 5000 verify the nut on the X axis, and double nut on the Y axis is tight.
7. Take out the angular contact bearings and inspect them. They should roll smoothly and be lightly
greased. If not, replace them. When putting the bearings back into the housing make sure to
put them in correctly. Failure to do this will cause problems. The thin race of each bearing
should be facing inward toward the spacer ring.
Note: 2500 & 3500 - the bearing housing and spacer ring are matched sets - keep them together.
8. Check the ball screw mounting to the yoke. Make sure the SHCS are tight.
9. Inspect the ball screw, ball nut and yoke for the potential problems shown in the chart below and
on the next page.
CAUTION!
Unlike a lead screw, do not unscrew the ball screw from its nut. This will destroy the ball
screw!
Potential Problem:
Check This:
Bad ball screw
 Visually inspect the ball nut - if the nylon seal
is broken or deformed, if contamination has
visibly entered the ball nut or if balls are out
of the ball nut, replace the ball screw.
 Crank the ball screw through a significant
part of its travel. If it jams, feel loose or has
rough spots, replace the ball screw.
 Use the dial indicator on a vertical flat of the
ball screw to check for backlash between the
ball screw and ball nut.
Ball nut not tightened to the yoke
 Inspect for space between the head of the
bolt and the ball nut i.e. the retaining bolt
has bottomed out in its thread and is not
securing the ball nut to the yoke properly.
Yoke loose in the saddle
 Inspect for any motion of the yoke or
looseness in the Yoke mounting screws.
Oil lines sheared
 Visual inspection.
Oil line blockage
 Pump the oil and ensure that it flows evenly
to the ways and ball screw.
Ball screws not aligned properly
 Measure from the ball screw to the back of
the saddle on both sides of the yoke (the
table must be removed). The measurements
must be within ±0.13 mm end to end. See
above explanations.
Note: Ball screws are inspected throughout their entire travel for backlash and consistent torque. A ball
screw should be good for millions of inches of travel if installed properly. Do not be too quick to replace a
ball screw if there is insufficient indication that it is bad; this will just be a costly delay to resolving the real
problem.

XYZ Machine Tools SMX 5000 Specifications

General

Brand	XYZ Machine Tools
Model	SMX 5000
Category	Power Tool
Language	English