Y-axis Bearing Adjustment
To adjust the Y-axis Bearing Clearance, first make sure the laser system is turned off.
Then, by hand, move the arm to the center of the engraving area. Loosen (only
slightly) the Lockdown Screws located on the left side of the arm and the right side of
the arm as the diagram below illustrates. DO NOT loosen them too much, only enough
to break the bond (about ¼ turn counterclockwise).
Y-axis Bearing Clearance Adjustment
After all four(4) Lockdown Screws are loose, push the arm towards the top of the field
and then the bottom of the field back and forth several times to seat the bearings. The
Tensioning Screws and Springs will force all four(4) bearings up against the Bearing
Tracks to take up the clearance. Now tighten the two(2) Lockdown Screws on the right
side first, then tighten down the two(2) on the left side.
Again, just tighten the Lockdown Screws just enough to lock them into place, if you
tighten them too much, the bearing plate can twist and give you an incorrect
adjustment.
To check your adjustment, slide the arm to the top of the engraving area and then to
the bottom while holding a finger (with very slight finger pressure) up against one of the
outer bearing surfaces. The bearing should roll in your finger while moving the arm
towards you or away from you. What you are checking for is if the outer bearing surface
is making contact with the Bearing Track from the top to the bottom of the engraving
area and that is does not spin freely without any friction. Check this on all four bearings.
If any of the outer bearing surfaces are not making contact with the Bearing Track
completely, then repeat this procedure again until all four bearings are touching the
Bearing Track throughout the range of the engraving area.
Remember, the objective is to remove the clearance between the outer bearing surface
and the Bearing Tracks,
NOT
to make the bearings tight so this is why we let the
Tensioning Screws and Springs supply the proper force.
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