Linear Encoder Guide | Principle, Accuracy, Testing & Error Analysis

Linear encoders provide high-precision position measurement for CNC machines and automation systems, enabling micron-level accuracy through optical or capacitive signal conversion.

What is a Linear Encoder

A device that converts motion into digital position signals.

Used in:

• CNC machines
• Automation systems
• Precision measurement

Testing Methods

• Temperature test
• Vibration test
• EMC test
• Drop test

Accuracy Definition

Error = Reference value – Measured value

Resolution & Interpolation

• Base scale: 20 μm
• Interpolated resolution: up to 0.05 μm

Signal Output

• RS-232
• RS-422
• BCD

Applications

• Position control
• Micro displacement measurement

Error Factors

• Temperature
• Installation
• Mechanical deformation