Maintenance event · 2026-03-27
Event overview
Event metadata
Record type
Maintenance event
Maintenance event
Reason / suite
Problem
Problem
Service provider
Vendor
Vendor
Record ID
2026-03-27_objective_change_issue_fixedMaintenance action
Reason details:
Objective change and z-drive operation produced abnormal noise and intermittent jamming.
Objective change and z-drive operation produced abnormal noise and intermittent jamming.
Action details:
Inspected the objective and z-drive system, found and replaced one cable with a bad connection, re-seated the PFS mirror that had shifted out of position and caused mechanical jamming, and cleaned accumulated dirt from the affected mechanism.
Inspected the objective and z-drive system, found and replaced one cable with a bad connection, re-seated the PFS mirror that had shifted out of position and caused mechanical jamming, and cleaned accumulated dirt from the affected mechanism.
Status after event:
Limited Service
Limited Service
Additional notes
Maintenance report: objective change issue is fixed. The system was checked end-to-end. A faulty cable connection was identified and replaced. The issue was reproducible until the root cause was confirmed as a displaced PFS mirror that intermittently jammed the mechanism. After re-seating the mirror and cleaning dirt from the assembly, movement returned to smooth operation. The microscope remains in limited status due to separate unresolved issues: increasing laser startup delay, occasional camera errors, and a SlideBook montage definition problem in the Y-direction.
Raw YAML record
View 2026-03-27_objective_change_issue_fixed.yaml
schema_version: 1
record_type: maintenance_event
maintenance_id: maint_scope-3i-csu-w1-spinning-disk_20260327_objective-change-fix
microscope: scope-3i-csu-w1-spinning-disk
service_provider: vendor
company: ''
contact: ''
reference: ''
started_utc: '2026-03-27T08:30:00Z'
ended_utc: '2026-03-27T13:00:00Z'
system_down_since_utc: '2026-03-27T08:30:00Z'
reason: problem
reason_details: Objective change and z-drive operation produced abnormal noise and
intermittent jamming.
action: repair
action_details: Inspected the objective and z-drive system, found and replaced one
cable with a bad connection, re-seated the PFS mirror that had shifted out of position
and caused mechanical jamming, and cleaned accumulated dirt from the affected mechanism.
microscope_status_before: limited
microscope_status_after: limited
downtime_hours: 4.5
related_qc: []
related_maintenance:
- maint-2025-04-02-zdrive
attachments: []
tags:
- objective
- z-drive
- pfs
- cleaning
followup: Objective/z-drive issue resolved, but system remains limited pending separate
diagnostics for laser startup delay, intermittent camera errors, and SlideBook Y-direction
montage bug.
next_due_date: ''
notes: 'Maintenance report: objective change issue is fixed. The system was checked
end-to-end. A faulty cable connection was identified and replaced. The issue was
reproducible until the root cause was confirmed as a displaced PFS mirror that intermittently
jammed the mechanism. After re-seating the mirror and cleaning dirt from the assembly,
movement returned to smooth operation. The microscope remains in limited status
due to separate unresolved issues: increasing laser startup delay, occasional camera
errors, and a SlideBook montage definition problem in the Y-direction.'
status_notes: Objective issue fixed, but laser startup delay, camera errors, and Y-montage
bug remain