Zhuhai Easson Measurement Technology Ltd.
Easson Measurement Technology Ltd. Always Committed to Quality, Technology & Innovation
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Vertical 5 Bearings Absolute Linear Encoder with Digital Readout Dro
Product Description
Advanced Optical Measuring System
Principal of Absolute Linear Scale
The grating scale of absolute linear scale consists of two grating masks, they are Absolute Grating Mask and Incremental Grating Mask respectively. Functions of this two masks are as per follows :
Absolute Grating Mask have different mask pattern over the whole grating glass, it gives low resolution but unique position readings over the whole measurement travel.
Incremental Grating Mask is an identical repeatable mask patterns over the whole grating glass, it gives very stable and high quality electronic signal for signal interpolation to achieve very high accuracy and resolution position readings.
Absolute Coding
All absolute coding used in our Absolute Grating Mask are designed by Easson, it is 100% our in-house design and intellectual property, designed and developed for different requirements of applications.
Product Specification
| VA10 | VA11 | VA12 | VA13 | VA20 | VA21 | VA22 | VA23 | ||
| Measuring Standard | Glass Scale - Grating period: 20μm (0.02mm) | ||||||||
| Optical Detecting System | Transmissive Infrared System: wave length 880mm | ||||||||
| Slide Carrier System | Vertical five bearings supporting system | ||||||||
| Resolution | 5μm | 1μm | 5μm | 1μm | 5μm | 1μm | 5μm | 1μm | |
| Measurement Travel | 50-1200mm | Every 50mm per length Specification | Not available | ||||||
| 1300-3000mm | Not available | Every 100mm per length Specification | |||||||
| Accuracy | 50-450mm | ±3μm - ±5μm | -- | ||||||
| 500-800mm | ±10μm | ±5μm | ±10μm | ±5μm | -- | ||||
| 1050-2000mm | ±10μm | ±5μm | ±10μm | ±5μm | -- | ||||
| 1300-3000mm | -- | ±10μm/m | |||||||
| Repeatability | 2μm (0.002mm) | ||||||||
| Hystersis | 3μm (0.003mm) | ||||||||
| Protection | IP 53 | ||||||||
| Power supply | DC 5V ± 5% | ||||||||
| Output Signal | TTL | TTL | 422 | 422 | TTL | TTL | 422 | 422 | |
Installation Dimensions
VA10 / VA11 / VA12 / VA13 Series
Connector interface
Gold-plated pins to avoid poor connection and Anti-corrosion, it has the small PCB inside the connector which allow the VA series Absolute Linear Scale built in the Laser compensation data and directly connect to our LCD DRO, ensure the high measuring accuracy.
DSUB 9PIN
| PIN | TTL | |
| Signal | Cable | |
| 1 | —— | —— |
| 2 | 0V | Orange |
| 3 | —— | —— |
| 4 | GND | GND |
| 5 | —— | —— |
| 6 | A | Yellow |
| 7 | 5V | Red |
| 8 | B | Green |
| 9 | R | Brown |
100% Laser calibration
All glass scale are individually inspected and calibrated by our in-house laser interferometer to ensure measuring accuracy comply 100% with the specifications.
Accuracy report
Each linear scale is printed with a QR code, which is convenient for users to view the accuracy report of the factory inspection.