Overview
The ZeroErr eCoder35 is an absolute magnetic encoder with axial reading and a 35 mm through-hole. The through-hole allows routing of mechanical structures, cables, and air lines. Choose an RS-485 single-lap absolute or multiple-turn absolute version, with 17-bit, 19-bit, or 20-bit resolution selections. Multiple-turn configurations also offer a multiturn counting battery selection.
Features
- Non-contact absolute encoder design; a multiple-turn version is available.
- 35 mm through-hole and stated maximum thickness of 8.6 mm.
- Maximum absolute tolerance: <0.05°; repeatability: ±5″.
- Maximum speed: 6,000 RPM for eCoder35.
- Hysteresis: less than one unit of resolution.
- Programmable zero position stored in internal EEPROM.
- Stated assembly tolerance of up to 0.1 mm.
- Provides a precision positioning reference for fast and accurate installation.
- Specified storage and operating temperature range: -40 to +105 °C; stated for environments with dust, heavy oil contamination, and high or low temperatures.
- Standard RS-485 protocol; stated compatible with Tamagawa absolute encoders.
Options
| Selection | Available options |
|---|---|
| Version | Absolute value of a single lap (RS485); Absolute value of multiple turns (RS485) |
| Resolution | 17-bit; 19-bit; 20-bit |
| Multiturn Counting Battery | Not Include; Include (Two pieces per pack) |
- Absolute value of a single lap (RS485): uses an RS-485 interface protocol.
- Absolute value of multiple turns (RS485): uses an RS-485 interface protocol.
- 20-bit multiple-turn option: up to 20-bit resolution, 216 revolution counting, programmable storable point-by-point position compensation, and ±5 arcseconds repeatability.
Specifications
eCoder35 specifications
| Parameter | Value |
|---|---|
| Model | eCoder35 |
| Maximum absolute tolerance | <0.05° |
| Repeatability | ±5″ |
| Reading type | Axial reading |
| Resolution | 17 bit to 21 bit and 16 bit multiturn counter option |
| Maximum speed | 6,000 RPM (eCoder35, eCoder45, eCoder65, eCoder35H) 12,000 RPM (eCoder11, eCoder18, eCoder20) |
| Hysteresis | Less than unit of resolution |
| Supply voltage | 4.7 V to 5.4 V |
| Current consumption | 105 mA to 125 mA (eCoder11, eCoder18, eCoder20) 70 mA to 90 mA (eCoder35, eCoder45, eCoder65) 115 mA to 130 mA (eCoder35H) |
| Connector | 8-pin connection |
| Battery standard voltage | 3.6 V |
| Battery warning voltage | <3.05 V |
| Battery operating current | 4 μA |
| Storage temperature | -40 to +105 °C |
| Operating temperature | -40 to +105 °C |
| External magnetic field | ±20 mT |
eCoder35 magnetic ring and readhead dimensions
| Parameter | eCoder35 |
|---|---|
| Magnetic ring inner diameter | 35 mm |
| Magnetic ring outer diameter | 55 mm |
| Magnetic ring weight | 19.0 g |
| Magnetic ring thickness | 2.5 mm |
| Readhead inner diameter | 42 mm |
| Readhead outer diameter | 67 mm |
| Readhead weight | 4.2 g |
| Readhead maximum thickness | 5.7 mm |
| Readhead arc length | 150° |
| Maximum resolution | 20 bits |
The product feature information also states a maximum thickness of 8.6 mm.
Installation drawing labels
| Drawing feature | Label or value |
|---|---|
| Outside diameter | Ø55 |
| Diameter feature | Ø42 |
| Through-hole diameter feature | Ø35 |
| Hole pattern | Three Ø2.8 holes |
| Hole pattern | Two Ø2 holes; tolerance markings are not fully legible |
| Hole pattern | Eight Ø2.1 holes |
| Additional hole feature | Ø2; tolerance markings are not fully legible |
| Radii | R33.5, R30.5, R27.7, R21, R19.25 |
| Arc angles | 150°, 75°, 68.5° |
| Angles | 45°, 22.5°, 15°, 6.5° |
| Sectional vertical dimensions | 0.8, 4.8, 1.6, 1.5, 1.3 ±0.1 |
| Datum and feature-control frames | Datum A; 0.05 tolerance relative to datum A in two feature-control frames |
| Connector interfaces | Two board-mounted connector interfaces |
Applications
- Humanoid robots
- Robotic arms
- Exoskeletons
- Quadruped robots
- AGV vehicles
- ARU robots
What's Included
For the multiturn counting battery selection, choose either Not Include or Include (Two pieces per pack).
Downloads
Downloads & Resources
- zeroerr eCoder35 — 3D Model (STEP)
- ZeroErr eCoder35 Drawing instalation — Installation Drawing (PDF)
- ZeroErr ZeroErr eCoder Ver2.4 1 — Manual (PDF)
Visual Details
Product Views

Features and Design


Dimensions and Construction


Application Examples

Interfaces and Connections
