High Accuracy Vertical 6 Springs Design Linear Encoder Glass Scale with Digital Readout System
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 |
There are actually two types of encoders: linear encoders and rotary encoders. The linear encoders — which we’ll focus on here — read movements along the path of the straight scale. Rotary encoders are used to measure the movements in a rotation. Rotary and linear encoders are similar in how they function but are designed to interpret different movements.
Installation Dimensions
VA20 Series
Connector interface
Easson absolute linear encoder use Gold-plated pins to avoid poor connection and Anti-corrosion, it has a 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 | 422A |
| Signal | Cable | Signal | Cable |
| 1 | —— | —— | A- | Yellow |
| 2 | 0V | Orange | 0V | White |
| 3 | —— | —— | B- | Red |
| 4 | GND | GND | GND | GND |
| 5 | —— | —— | R- | Black |
| 6 | A | Yellow | A | Green |
| 7 | 5V | Red | 5V | Brown |
| 8 | B | Green | B | Blue |
| 9 | R | Brown | R | Grey |
Product Description
Advanced Optical Measuring System
The slide carrier of the VS / VA series scales, using 5 bearing design and 6 spring for optical grating linear transducer, make sure the VA scales not effected by installation, the spring can adjust the angle when the operator install not good for the alignment.
The reader head still in the best way fit on the grating glass, the accuracy of VA scale is totally different with the GS or other brand in China mainland.
VA scale has a small PCB inside the 9 PIN connector, the laser compensation data is store inside, with our LCD Digital display unit, the compensation data will directly load the ECF file (compensation file) into the DRO, accuracy up to ±2μm.
Aging Test
Easson Optical Linear Scale's reader head need to power on for 24 x 3 hours aging test before assemble,
make sure all linear scale's is reliable working for long time.
100% Laser calibration
All linear encoder glass scale are individually inspected and calibrated by our in-house laser interferometer to ensure measuring accuracy comply 100% with the specifications.
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Vertical Digital Readout Linear Scale Sealed 6 Springs Design Images
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