PI A-688 Air Bearing Rotary Stage
PI A-688 Air Bearing Rotary Stage
PI A-688 is a direct-drive air-bearing rotary-stage platform with a large aperture and high-resolution position feedback. Stage geometry, controller, air services and actual payload must be specified together before assessing the installed metrology or positioning result.
Review Summary
Evaluate A-688 for an identified precision-rotation task that justifies its air-bearing and aperture arrangement. Confirm current configuration/support, service requirements and measured geometric performance; encoder resolution is not the same quantity as angular accuracy or process capability.
Reviewed stage A-688 air-bearing rotary platform Drive architecture Direct-drive torque motor with closed-loop position feedback Mechanical feature Large through aperture; exact drawing governs dimensions Feedback scope High-resolution feedback describes sensing, not complete-stage accuracy Required services Air supply, controller and installation must match exact documentation Performance selection Payload, geometric error, speed and settling require configuration-level assessment Applications and Industries
Semiconductor and electronics production equipment; Laser processing
Electronics and semiconductors; Manufacturing
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| Reviewed stage | A-688 air-bearing rotary platform |
| Drive architecture | Direct-drive torque motor with closed-loop position feedback |
| Mechanical feature | Large through aperture; exact drawing governs dimensions |
| Feedback scope | High-resolution feedback describes sensing, not complete-stage accuracy |
| Required services | Air supply, controller and installation must match exact documentation |
| Performance selection | Payload, geometric error, speed and settling require configuration-level assessment |
