Voice Coil Actuators

Buyer Decision Criteria

• Stroke, peak and continuous force, air gap, and bandwidth target.
• Moving mass, coil heat, and allowable magnet temperature.
• Flatness, carrier stiffness, and alignment datums.
• Field mapping method for the active stroke.

Factory Support Scope

• Compact linear and planar Halbach stator assemblies.
• Magnet sorting and fixture bonding for low ripple.
• Carrier machining for precision optical or semiconductor stages.
• Field maps for the useful stroke and working gap.

RFQ Preparation Checklist

1. Required stroke
2. Continuous and peak force
3. Air gap, bandwidth target, and moving mass limit
4. Coil heat assumptions and field map height over active stroke

Risk and Mitigation

• Coil overheating: Optimized air gap and forced air cooling options.
• Field profile not aligned to active stroke: Map the field over the actual stroke and working gap, not only at the magnet face.
• Mechanical misalignment in optical or semiconductor stages: Use CNC datum carriers and flatness checks before final assembly approval.

Validation Deliverables

• Working-gap field map over the active stroke.
• Carrier flatness and critical dimension inspection.
• Grade, coating, and adhesive process notes.
• Prototype-to-production inspection plan.

RFQ to Delivery Flow

1. Send stroke, force, bandwidth, gap, coil heating assumptions, and envelope.
2. We review pitch, grade, and carrier strategy for low ripple output.
3. Prototype mapping supports actuator force testing.
4. Production repeats matched magnet sorting and fixture controls.