LIGO Document E1300028-x0
- Release of Pcal Periscope Mirror Alignment Pin.
- FROM ECR E1300038-v1:
The D1200172 & D1200173 Mirror Mount Bases (used on the Pcal Periscope Structure) were intended to be fitted (press fit) with 3/16” diameter commercial dowel pins to slip-fit the respective Siskiyou mirror mounts for which the Bases are designed. This gives repeatable precision alignment to the mirror mounts in removal and replacement from and to the Periscope Structure. The bases were mistakenly designed and manufactured with press fit holes for ¼” diameter dowel pins. D1300022 is a two diameter pin to be used in the Bases to correct this discrepancy.
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