AMSABS 3L Long-Axis Absolute Measuring System
Absolute Measuring System for Long Axis - Roller Profile Guideway
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 can achieve a maximum measuring distance of 48 meters, 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 - Maximum measuring length up to 48 meters (multi-segment rail connection)
- 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
| Parameter | Specification |
|---|---|
| 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 |
| Maximum measuring length | 48,000 mm (multi-segment connection) |
| 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.
| 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.
AMSABS 3L Rail Available Options
| Parameter | Code | Description |
|---|---|---|
| Accuracy | G1 | Very accurate |
| Straightness | KC | Standard - Countersunk holes |
| Coating | CN | None |
| Locating sides | R11 | Ref. bottom, scale bottom |
| R21 | Ref. bottom, scale top |
Coding
P0 - No coding (rail only)
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.
| 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.
AMSABS 3L Carriage Available Options
| Parameter | Code | Description |
|---|---|---|
| Accuracy | G0 | Highly accurate |
| G1 | Very accurate | |
| G2 | Accurate | |
| G3 | Standard | |
| Preload | V1 | Low |
| V2 | Medium | |
| V3 | High | |
| Reference side | R1 | Ref. at bottom |
| R2 | Ref. on top | |
| Coating | CN | None |
| CH | Hard chromium | |
| Lube connections | S10 | Left center |
| S20 | Right center | |
| S11 | Top left | |
| S21 | Top right | |
| S12 | Lower left side | |
| S22 | Lower right side | |
| S13 | Upper left side | |
| S23 | Upper right side | |
| S32 | Left side | |
| S42 | Right side | |
| S49 | P1: S10+S12+S13 / P3: S20+S22+S23 (threaded nipple lock) | |
| Reading head position | P1 | Right top |
| P3 | Left bottom | |
| Lubrication | LN | Oil protect |
| LG | Grease protect | |
| LV | Full greasing | |
| Interface | TMH | Mitsubishi high resolution interface (absolute, 0.3m) |
| TRH | TTL RS-422 interface (absolute, 3m) | |
| TSH | SSI serial synchronous interface (absolute, 3m) |
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 specificationsAMSABS 3L Size 30
Rail width 28mm, accuracy ±3~±10 µm/m, carriage types A-D, F-G.
View specificationsAMSABS 3L Size 35
Rail width 34mm, accuracy ±3~±10 µm/m, carriage types A-G.
View specificationsAMSABS 3L Size 45
Rail width 45mm, accuracy ±3~±10 µm/m, carriage types A-D, F-G.
View specificationsAMSABS 3L Size 55
Rail width 53mm, accuracy ±3~±10 µm/m, carriage types A-D, F-G.
View specificationsAMSABS 3L Size 65
Rail width 63mm, accuracy ±3~±10 µm/m, carriage types A-D.
View specificationsSize 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 |
| Single rail 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 |
| Rail weight (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
Plugs (MRK) Assembly tool (MWM 3L) Rail end piece (EST 3L) Spacer plate set (MDB 3L)
Carriage Accessories
Additional wiper (ZRV) Bellows (FRB) Bellows adapter plate (ZFR) Bellows end plate (EFR) Assembly rail (MRM 3L) Lubrication plate (SPL)
Lubrication Accessories
Lubrication fitting M6/M8 Grease nipple fitting Hose connector