PSC 2000781J MkII MLB Operating Procedure page 19

Step
Consider how the Lightband will be compressed. The Separation Springs may
8.1.4
be distributed asymmetrically around the Lightband to induce tip-off or
compensate for an offset CG. In this case using a central single compression
point may not be adequate. Lightband Compression Tools (LCTs) are
effective. See section 18 for details.
Verify the system being used to compress the Lightband has a total axial (X
8.1.5
stiffness less than 2,000 lb/in (the entire loop from the Upper Ring around to
the Lower Ring). This applies to a crane system offloading a mass, a
compression clamp fixture, etc. An isolation system (if attached to the
Lightband) can be included in this stiffness calculation. See Figure 8-3.
This compliance ensures the Lightband is able to expand or contract slightly
when being stowed. If the system is overly stiff, the Lightband motors may not
be able to impart the necessary power required to stretch/compress the
system.
Figure 8-3: Verifying compliance in Lightband compression system. Two common methods shown.
Step
Verify the lateral (Y
8.1.6
less than 100 lb/in.
This compliance ensures the Lightband can self-align while stowing. If the
system is overly stiff, the Lightband motors will not be able to impart the
necessary power required to rapidly align the system.
Ensure the Lower Ring is on a stable and visually level surface.
8.1.7
PSC Proprietary
Procedure
Procedure
& Z ) stiffness between the Upper and Lower Rings is
LB LB
2000781J MkII MLB Operating Procedure
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LB
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