Nor-Cal PMXYZ Series Precsion Manipulator - Manual (Page 5)

High-Vacuum Containment and Control
Adjustments
Your PMXYZ manipulator is correctly adjusted prior to shipment. This section is
included to aid the user in making changes in these settings if he so desires.
LINEAR CROSS ROLLER BEARINGS: The linear bearings are adjustable on
thePMXYZ manipulator. There are two sets of 3 each, 8-32 set screws that apply
tension to the sets of cross rollers. To adjust, the 4 SHCSs must be loosened to
allow roller bar movement. The three set screws can then be tightened to a
uniform tension to "just load" the roller sets. The 4 SHCSs can the be tightened
to lock in the new position. This procedure can be repeated on the other
axis.MICROMETERS: Micrometer play is affected by two micrometer
adjustments.
1.Micrometer thread engagement is adjustable by removing the micrometer
handle and tightening or loosening a knurled nut on the barrel. This adjustment
normally does not need to be performed in the field.
2.The micrometer to stage coupling is adjustable via the approx. 1" diameter
knurled cylinder around the end of the micrometer spindle.
At the end of the micrometer spindle, under the 1" dia knurled cylinder, is a small,
chrome plated, dome anvil. This must be finger tight to properly load onto the
cross shaft. These are properly adjusted at the factory, and should not require
further adjustment.
When re-installing the micrometer/ micrometer bloc assemblies, the following
procedure will assure the best alignment.
1.Install and snug the two 1/4 -20 SHCS. Back each screw off 1/8 to 1/4 turn.
2.Assemble knurled collar/bearing at end of micrometer spindle into receiver on
guide rod. Tighten firmly finger tight. This will align the micrometer block.
3.Tighten the two 1/4-20 SHCS. Back off the knurled adjustment collar to a light
tension, without axial play. Test operation for smoothness.