DCN - HAM Crossbeam Miscellaneous

Document #:

LIGO-E0900266-x0

Document type:

E - Engineering documents

Abstract:

DCN for miscellaneous machined parts for Advanced LIGO HAM Crossbeams.

Files in Document:

None

Topics:

• Seismic Isolation
• Change Control
• Final Design

Authors:

• Andy Stein

Keywords:

DCN Crossbeam

Notes and Changes:

v2 releases for drawings for several machined parts used in assembly of Advanced LIGO HAM Crossbeams. Changes made since v1 release include:

For all drawings:
1. Using new LIGO drawing formats.
2. Added note for part weight (in pounds).

For D080465:
1. Specified 1018 cold rolled steel, instead of 'Low Carbon Steel'.
2. Minor changes to countersink dimensions.
3. Slightly increased size of 1/2" clearance holes.
4. Changed details of P/N engraving.
5. Added chamfers to interface surfaces.
6. Added finish spec (125 um).

For D080698:
1. Added chamfers.
2. Added countersinks.
3. Added P/N engraving.
4. Added finish spec (125 um).

For D080699:
1. Added chamfers.
2. Added countersinks.
3. Added P/N engraving.
4. Added finish spec (125 um).

For D080700:
1. Added chamfers.
2. Added P/N engraving.
3. Added finish spec (125 um).

Referenced by:

• LIGO-D080465-v2: HAM Crossbeam HEPI Adapter
• LIGO-D080700-v2: Crossbeam Washer Disc
• LIGO-D080698-v2: Crossbeam Washer Plate #1
• LIGO-D080699-v2: Crossbeam Washer Plate #2