Product Overview
MONORAIL AMSABS 3L is an integrated absolute position measuring system designed by SCHNEEBERGER specifically for long-axis applications. It perfectly combines a high-precision magneto-resistive position sensor with the proven MONORAIL MR four-row roller guideway. This system provides an ideal solution for large machine tools, gantry machining centers, and high-end automation equipment requiring ultra-long stroke positioning and real-time position feedback.
Absolute Measuring Advantages
Unlike incremental systems, absolute measuring systems provide precise position information immediately upon power-up, without requiring a homing procedure. Through multi-segment rail connection technology, AMSABS 3L is designed for measuring lengths > 6 m and can be assembled to any length, significantly reducing machine startup time and ensuring immediate resumption of machining operations after power interruption.
AMSABS 3L employs magneto-resistive measuring principles, with the reading head integrated directly inside the carriage housing for a compact system design. The magnetic scale tape is embedded in the rail side, fully protected from external environmental influences. The system offers various digital interface options including SSI, SSI+1Vpp, FANUC, Mitsubishi, and Siemens Drive-CLiQ®, allowing easy integration with various control systems.
AMSABS 3L System Features
- Absolute magneto-resistive measuring principle - Precise position known immediately at power-up, no homing required, reduced startup time
- Ultra-long measuring distance - Designed for measuring lengths > 6 m; multiple rail segments can be connected to any length
- Modular design - Rails connected with 0.5mm gap, system length = rail length + gap
- Based on MONORAIL MR guideway - Four-row roller O-arrangement provides maximum rigidity and load capacity
- High-precision position feedback - Absolute magneto-resistive measurement provides accurate position feedback
- Integrated reading head design - Reading head embedded in carriage housing, no additional system volume
- Protected magnetic scale tape - Scale tape embedded in rail side, protected from contamination and damage
- Multiple interface options - SSI / SSI+1Vpp / FANUC / Mitsubishi / Siemens Drive-CLiQ®
- IP67 protection rating - Suitable for harsh industrial environments
System Specifications
| Measuring principle | Magneto-resistive |
| Measuring type | Absolute |
| Magnetic pole period | 200 µm |
| Resolution | 0.244 µm (SSI interface) / 0.05 µm (1Vpp interpolation) |
| Single rail segment length | Max. 3000 mm |
| Measuring length | > 6 m (multi-segment rail connection, can be assembled to any length) |
| Rail connection gap | 0.5 mm |
| Coding | P0 (no coding, rail only) |
| Maximum speed | 10 m/s (1Vpp) / 5 m/s (SSI) |
| Output interfaces | SSI / SSI+1Vpp / FANUC / Mitsubishi / Siemens Drive-CLiQ® |
| Operating temperature | 0°C ~ +60°C |
| Protection rating | IP67 |
| Supply voltage | DC 5V (± 5%) |
Rail Types and Available Options
AMSABS 3L rails are based on the MONORAIL MR design, with built-in magnetic scale tape for absolute position measurement. Only N-type (standard) rails are available.
| Type drawing | Model | Description | Available Sizes | Features |
 | N | Standard type | 25, 30, 35, 45, 55, 65 | Without cover, suitable for multi-segment connection |
Note: AMSABS 3L only offers N-type rails, no covered (C-type) rails available. Rail design is optimized for long-axis multi-segment connections.
Coding
Carriage Types and Available Options
AMSABS 3L carriages have built-in reading heads and share the same load capacity and mechanical characteristics as MONORAIL MR carriages.
| Type drawing | Model | Description | Available Sizes | Fastening | Features |
 | A | Standard type | 25-65 | Top | High load and moment, with reading head |
 | B | Standard long type | 25-65 | Top | Extended design, higher moment, with reading head |
 | C | High-narrow type | 25-65 | Top | Lower height, high load, with reading head |
 | D | High-narrow long type | 25-65 | Top | Extended high-narrow type, higher moment, with reading head |
 | E | High-narrow, lateral fastening | 25, 35 | Lateral | Side mounting holes, special installation, with reading head |
 | F | Flat type | 25-55 | Top | Lowest height design, with reading head |
 | G | Flat long type | 25-55 | Top | Extended flat design, with reading head |
Integrated Reading Head Design
AMSABS 3L carriages integrate the reading head inside the carriage housing, with the reading head output cable exiting from the carriage side. The carriage body is identical to MONORAIL MR, with the same load capacity and mechanical characteristics. Available carriage types vary by size: Size 30/45/55 do not have E-type, Size 65 only has A, B, C, D types. Reading heads can be easily replaced and are universal across all sizes.
Available Sizes
Select a size to view detailed specifications:
AMSABS 3L Size 25
Rail width 23mm, accuracy ±3~±10 µm/m, carriage types A-G.
View specifications AMSABS 3L Size 30
Rail width 28mm, accuracy ±3~±10 µm/m, carriage types A-D, F-G.
View specifications AMSABS 3L Size 35
Rail width 34mm, accuracy ±3~±10 µm/m, carriage types A-G.
View specifications AMSABS 3L Size 45
Rail width 45mm, accuracy ±3~±10 µm/m, carriage types A-D, F-G.
View specifications AMSABS 3L Size 55
Rail width 53mm, accuracy ±3~±10 µm/m, carriage types A-D, F-G.
View specifications AMSABS 3L Size 65
Rail width 63mm, accuracy ±3~±10 µm/m, carriage types A-D.
View specifications Size Specifications Comparison
| Specification | Size 25 | Size 30 | Size 35 | Size 45 | Size 55 | Size 65 |
| Rail width B1 (mm) | 23 | 28 | 34 | 45 | 53 | 63 |
| Rail height J1 (mm) | 24.45 | 27.95 | 31.95 | 39.95 | 47.95 | 57.95 |
| Mounting Hole Pitch L4 (mm) | 40 | 40 | 40 | 52.5 | 60 | 75 |
| Maximum single segment length L3 (mm) | 2999.5 | 2999.5 | 2999.5 | 2939.5 | 2999.5 | 2999.5 |
| System length L3' (mm) | 3000 | 3000 | 3000 | 2940 | 3000 | 3000 |
| Connection gap S (mm) | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Weight per Meter (kg/m) | 3.3 | 4.5 | 6.5 | 10.5 | 15.2 | 22.8 |
| Available carriage types | A-G | A-D, F-G | A-G | A-D, F-G | A-D, F-G | A-D |
| C₀ Static load (N) * | 49,800 | 66,600 | 93,400 | 167,500 | 237,000 | 419,000 |
| C₁₀₀ Dynamic load (N) * | 27,700 | 37,100 | 52,000 | 93,400 | 131,900 | 232,000 |
* Based on A/C/E/F type carriages
Available Accessories
Rail Accessories
| MRK | Plugs |
|---|
| MWM 3L | Assembly tool |
|---|
| EST 3L | Rail end piece |
|---|
| MDB 3L | Spacer plate set |
|---|
Carriage Accessories
| ZRV | Additional wiper |
|---|
| FRB | Bellows |
|---|
| ZFR | Bellows adapter plate |
|---|
| EFR | Bellows end plate |
|---|
| MRM 3L | Assembly rail |
|---|
| SPL | Lubrication plate |
|---|
Lubrication Accessories
| Lubrication fitting M6/M8 |
| Grease nipple fitting |
| Hose connector |
View complete accessories list →
