[INSTRM-1388] Poor convergence quality during Sep 2021 run Created: 11/Oct/21  Updated: 03/Nov/21  Resolved: 03/Nov/21

Status: Done
Project: Instrument control development
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Task Priority: Normal
Reporter: hassan Assignee: chyan
Resolution: Done Votes: 0
Labels: EngRun
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Blocks
is blocked by INSTRM-1392 Determine blackspot positions on PFI ... In Progress
is blocked by INSTRM-1391 Theoretical cobra centers are not cor... Done
is blocked by INSTRM-1395 Some fiducial fibers are not found Done
Relates
relates to INSTRM-1401 Populate target table Done
Story Points: 1
Sprint: PreEngRun4, EngRun3Cleanup

 Description   

The convergence quality during the September 2021 run was not as good as what had been determined previously at ASRD. Please find the cause.

This could be due to:

1. The expected cobra centers provided did not match the measured centers.
2. Some fiducial fibers were not correctly identified.

Quoting a comment by rhl in his email 2021-10-07:

I think that we didn't propagate the relevant opdb tables to provide the target (x, y) (mm) and (theta, phi) (radians), so there's a
prerequisite (load the opdb back to the beginning of the September run), and a task (load the opdb tables) before we next run the system.

 Comments   
Comment by rhl [ 29/Oct/21 ]

Where do we stand on this? I don't think that the problem was the centres or fiducial IDs.

The quoted comment from me more applies to INSTRM-1401, which was probably a prerequisite to this work.

Comment by hassan [ 03/Nov/21 ]

The cause of poor convergence quality for PFI cobras should still be understood but requires further discussion and a new ticket(s).

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