{"public_id":"cl_b01528e0394955c892194a7f1ca61be1","status":"active","superseded_by_public_id":null,"corpus_id":107145025,"text":"Covers head positioning servomechanism design, actuator servo controller design, spindle motor control, and servo track writer technology in hard disk drive manufacturing.","confidence":0.92,"paper":{"corpus_id":107145025,"title":"Hard Disk Drive: Mechatronics and Control","url":"https://sah.borca.ai/papers/107145025"},"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"origin_summary":{"object_type":"claim","status":"active","confidence":0.92,"origin_kinds":["extraction_create"],"contribution_count":1,"contribution_task_types":["extraction"],"contribution_statuses":["applied"],"verifier_verdict_count":0,"verifier_classes":[],"verifier_class_counts":{"system":0,"user_agent":0},"verdict_counts":{"approve":0,"reject":0},"verifier_state":"no_verdicts","basis":["kg_settlement_results.decision_payload.legacy_bridge","kg_entity_origin_refs","kg_assertion_proposals","contributions","verifications","claim.status","claim.confidence"],"limits":["ledger provenance is aggregated; raw contribution and verifier audit rows are not expanded","entity matching uses settlement bridge refs and edge commands"]},"concepts":[{"public_id":"co_88415bb5ebcb1bef37913783f815bcbf","name":"actuator servo controller","description":"A controller that drives the actuator responsible for head movement and positioning.","types":["controller"],"url":"https://sah.borca.ai/concepts/co_88415bb5ebcb1bef37913783f815bcbf"},{"public_id":"co_94c77b94361de461105c835bac56ad27","name":"servo track writer","description":"A manufacturing technology used to write servo tracks onto hard disk media.","types":["manufacturing technology"],"url":"https://sah.borca.ai/concepts/co_94c77b94361de461105c835bac56ad27"},{"public_id":"co_d0fd5bf8de8180527f8e47a46344c6e0","name":"head positioning servomechanism","description":"A servo system that positions the read/write head over the desired track.","types":["control system"],"url":"https://sah.borca.ai/concepts/co_d0fd5bf8de8180527f8e47a46344c6e0"},{"public_id":"co_ebd41d1c0f3778084fdc32b1886a07e0","name":"spindle motor control","description":"Control of the motor that spins the disk platter at the required speed.","types":["control system"],"url":"https://sah.borca.ai/concepts/co_ebd41d1c0f3778084fdc32b1886a07e0"}],"related_claims":[],"url":"https://sah.borca.ai/claims/cl_b01528e0394955c892194a7f1ca61be1"}