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.
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Voice Coil Actuators
High-bandwidth, direct-drive linear motion using Halbach arrays.
Target Buyer:Precision automation and photonics engineers.
Best-Fit Application Use
Best fit for precision automation teams that need high acceleration, low cogging, and predictable field output in a compact actuator envelope.
Solution Highlights
- Zero cogging
- Extreme acceleration capability
Common Use Cases
- Semiconductor wire bonding
- Optical focusing stages
Implementation Focus
- Moving mass minimization
- Thermal management of the coil
- Low ripple field over the active stroke
- Carrier flatness and datum alignment
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.
Application Evaluation Matrix
| Evaluation Metric | Typical Range | Buyer Relevance |
|---|---|---|
| Bandwidth | Project-specific by stroke, moving mass, and coil design | Determines the practical frequency of reciprocating motion for the full actuator. |
| Force Ripple | Defined by optical, bonding, or positioning tolerance | Ripple creates tracking error in high-bandwidth direct-drive stages. |
| Moving Mass Impact | Reviewed with coil and carrier design | Lower moving mass improves acceleration and settling time in VCM systems. |
RFQ Preparation Checklist
- Required stroke
- Continuous and peak force
- Air gap, bandwidth target, and moving mass limit
- 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
- Send stroke, force, bandwidth, gap, coil heating assumptions, and envelope.
- We review pitch, grade, and carrier strategy for low ripple output.
- Prototype mapping supports actuator force testing.
- Production repeats matched magnet sorting and fixture controls.
Recommended Products
Buyer FAQ
Do you supply the moving coil as well?
We typically supply the permanent magnet stator track, but can partner for complete assemblies.
Why use a Halbach array in a voice coil actuator?
A Halbach stator concentrates flux in the working gap, improving force density while reducing stray field on the opposite side.
What validation data is most useful for VCM buyers?
A working-gap field map over the active stroke is more useful than a single peak surface-field value.
Related Resources
Engineering RFQ Inbox
Include target torque/speed, quantity, and delivery location.
Direct Engineer Chat
WhatsApp Engineering Support
Use for drawing, specification, and RFQ clarification.