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Kollmorgen 6SM-56-L-3000
Model Series: SM56 Series (Ironless Linear Motors)
Product Introduction:
The 6SM-56-L-3000 is an ironless (coreless) linear servo motor from the SM56 product family. The “L” designation confirms linear configuration, and “3000” indicates a 3,000 mm (3 meter) stroke length. Ironless construction eliminates cogging force and eddy current losses, enabling ultra-smooth motion at very low speeds.
Detailed content
Technical Specifications:
| Parameter | Value |
|---|---|
| Motor Type | Ironless (Coreless) Linear Servo Motor |
| Forcer Width | 56 mm |
| Stroke Length | 3,000 mm (3.0 m) |
| Continuous Force | ~35 N (typical for SM56-56mm width) |
| Peak Force | ~105 N (3x continuous, 10-second rating) |
| Continuous Speed | ~2.0 m/s |
| Max Speed | ~4.0 m/s |
| Force Constant (Kf) | ~10 N/A (typical) |
| Back-EMF Constant | ~9.5 V/(m/s) (typical) |
| Coil Resistance (per phase) | ~1.5 Ω (typical) |
| Coil Inductance (per phase) | ~0.8 mH (typical) |
| Magnet Track Length | 3,000 mm + 100 mm overrun each end |
| Encoder Type | Incremental glass scale, 5 µm resolution (200 lines/mm) |
| Encoder Output | RS-422 Differential ( quadrature A/B/Z) |
| Operating Temperature | 0°C to +40°C (ambient) |
| Forcer Weight | ~2.8 kg |
| Magnet Track Weight | ~6.5 kg (for 3,000 mm length) |
| IP Rating (Forcer) | IP65 (with seal kit) |
| IP Rating (Magnet Track) | IP54 (standard) |
Structural Features:
- Ironless forcer coil: Wound directly on a non-magnetic former, zero cogging force
- Halbach magnet array: On the magnet track for maximum flux density in the air gap
- Pre-loaded recirculating ball bearing carriage: Integrated into forcer for smooth linear guidance
- Continuous magnet track: Full-length NdFeB magnet array with steel backing
- Glass scale encoder: Mounted on magnet track for absolute position reference
Working Principle:
Lorentz force principle: current flowing through the forcer coils interacts with the permanent magnet field on the track, producing linear force. Ironless construction eliminates iron losses and cogging, enabling force ripple below 1% of continuous force.
Advantages:
- Zero cogging force: enables sub-micron positioning at very low speeds
- High acceleration: >100 m/s² achievable
- No wear particles (ironless): ideal for cleanroom applications
- Maintenance-free operation (no brush wear)
Applicable Industries:
- Semiconductor wafer inspection and handling
- Flat panel display manufacturing
- Medical device automation
- Laser cutting and engraving
- High-precision metrology
Installation Requirements:
- Magnet track must be mounted on a precision-ground flat surface: flatness <0.05 mm over full length
- Forcer must be aligned parallel to track: <0.02 mm over 3,000 mm
- Cable carrier required for forcer cable management (3,000 mm travel)
- Ambient temperature must not exceed 40°C for continuous force rating
Usage Notes:
- Do not allow forcer to impact end stops at full speed; use mechanical dampers
- Glass scale must be protected from chipping; handle with care during installation
- Derate continuous force by 20% for operation above 35°C ambient
