ZeroErr Control eRob Robot Joint Actuators and Precision Encoders

ZeroErr eRob In-Line I-Series Robot Joint Actuators (eRob70I, eRob80I, eRob90I, eRob110I, eRob142I, eRob170I)

ZeroErr Control eRob I-Series in-line cylindrical robot joint actuators deliver an all-in-one integrated motion architecture designed for multi-axis robotic manipulators.

Each actuator seamlessly houses a frameless permanent-magnet brushless torque motor, a zero-backlash harmonic drive gearhead with reduction ratios from 50:1 to 120:1, dual optical-magnetic absolute encoders measuring input and output positions up to 19–20 bit resolution, an embedded low-voltage

digital servo drive, and an electromagnetic power-off safety brake. The continuous center hollow bore ranging from 14 mm to 45 mm allows direct through-routing of pneumatic tubing, power conduits, and industrial communication lines, eliminating external harness snagging and mechanical wear.

• Fully integrated joint architecture: frameless synchronous motor, harmonic reducer, dual multi-turn absolute encoders, DC servo drive, and holding brake in a single housing
• Dynamic torque output: nominal output torque from 12 to 380 Nm, peak acceleration torque reaching 750 Nm with output speeds from 30 to 60 rpm
• Precision positioning and mechanical rigidity: backlash constrained within 10–20 arcseconds with bidirectional repeatability of ±10 arcseconds on cross-roller bearing supports
• Through-shaft hollow aperture: internal bore diameter from 14 to 45 mm enabling concealed internal cable and pneumatic routing across articulated arms

ZeroErr eRob Right-Angle T-Series Robot Joint Actuators (eRob70T, eRob80T, eRob90T, eRob110T, eRob142T)

ZeroErr Control eRob T-Series right-angle robot joint actuators provide orthogonal motion geometry engineered for shoulder, elbow, and wrist linkages across articulated robotic arms.

By orienting the driving motor perpendicular to the output flange, the T-series eliminates cumbersome external elbow adapter brackets, achieving ultra-compact joint packing.

Equipped with precision harmonic reduction gearing, low-voltage DC field-oriented control servo electronics (DC 24–48 V), and internal slip conduits, these actuators support continuous multi-turn motion across robotic handling cells, mobile service robots, and medical tele-surgery units.

• Right-angle kinematic topology: orthogonal drive orientation streamlining articulated manipulator arm geometry without heavy intermediate structural brackets
• Embedded digital servo control: high-bandwidth field-oriented control (10 kHz current loop) supporting CANopen and EtherCAT protocols adhering to CiA 402 profiles
• Mechanical performance envelope: continuous rated torque from 15 to 250 Nm backed by high-capacity cross-roller bearings absorbing extreme tilting moments
• Thermal management and protection: rugged aircraft-grade aluminum casing offering IP54/IP65 environmental ingress sealing and ambient temperature handling from 0 to +55 °C

ZeroErr eRob Ultra-Lightweight Flange Joint Modules (eRob70F and eRob80F, 0.89 kg)

ZeroErr Control eRob F-Series ultra-lightweight flange joint modules (eRob70F and eRob80F V4) are precision-engineered for terminal wrist articulations and distal payload links across collaborative robots, exoskeletons, and humanoid robotic systems.

Weighing just 0.89 kg with an outer diameter of 80 mm and an 18 mm through-hole aperture, the eRob80F sets industry standards for torque-to-weight ratios.

Its onboard next-generation digital servo drive supports real-time EtherCAT bus cycle synchronization down to 250 microseconds, empowering agile robotic arms with rapid force-compliance interaction.

• Ultra-lightweight compact envelope: 70–80 mm outer body diameter, 0.89 kg net weight for eRob80F with an 18 mm hollow center bore
• High dynamic torque density: instantaneous peak torque reaching 55 to 85 Nm paired with ultra-low rotor inertia for high-speed assembly and trajectory control
• Dual-encoder safety architecture: input and output position feedback facilitating real-time gear deflection compensation and sensorless collision detection
• CR Safety Certification: first robot joint actuator in China to secure the national China Robot Certification (CR) for humanoid integrated actuators

ZeroErr eCoder Hollow-Shaft Absolute Magnetic Encoders (eCoder11, eCoder18, eCoder20, eCoder35, eCoder45, eCoder65)

ZeroErr Control eCoder series precision hollow-shaft absolute magnetic encoders utilize contactless magnetoresistive sensing technology configured in ultra-thin low-profile ring housings.

Featuring large central through-apertures from 11 mm to 65 mm, eCoder units install directly onto reduction gear output shafts, direct-drive hollow spindles, and rotary stages.

A dual-track magnetic scale paired with onboard digital interpolation ASICs delivers single-turn absolute resolution from 17 to 21 bits (up to 2,097,152 counts/rev), maintaining micro-radian tracking precision even amid mechanical runout, oil contamination, and shock vibration.

• High resolution and repeatability: single-turn absolute positioning up to 17–21 bits with positioning accuracy constrained within ±30 arcseconds
• Broad hollow aperture selection: configurations spanning eCoder11, eCoder18, eCoder20, eCoder35, eCoder35H, eCoder45, and eCoder65 with inner diameters from 11 to 65 mm
• High-speed digital bus protocols: seamless communication via BiSS-C (up to 10 Mbps clock rates), synchronous SSI, RS-485 Modbus-RTU, and asynchronous UART
• Industrial ruggedness: immune to dust, oil mist, and condensation, with 100g mechanical shock survivability and thermal resilience from -40 °C to +85 °C

ZeroErr Embedded Low-Voltage DC Micro Servo Drives (DC 24–48 V, CiA 402 Compliant)

ZeroErr Control high-power-density miniature DC servo drives are custom-engineered for direct encapsulation inside robotic joints, pan-tilt platforms, and autonomous mobile robot (AGV/AMR) traction wheel assemblies.

Operating across bus voltages from 18 to 56 VDC (24 V/48 V nominal), these drives deliver continuous phase currents up to 25 A and peak transient current limits of 60 A.

Driven by digital signal processors with 20–40 kHz PWM switching frequencies, the firmware applies field-oriented vector control (FOC) algorithms minimizing torque ripple and acoustic noise across low-speed tracking applications.

• Electrical ratings: DC 18–56 V operating bus voltage range, up to 25 A continuous current delivery and 60 A peak overload capacity
• Motion control modes: cyclic synchronous position (CSP), velocity (CSV), and torque (CST) plus profile modes complying with CAN in Automation CiA 402 standards
• Encoder interface versatility: universal input accepting BiSS-C, SSI absolute protocols, incremental quadrature ABZ encoders, Hall sensors, and NTC/PT1000 thermal probes
• Hardware protection and functional safety: integrated overvoltage clamping, phase short-circuit detection, thermal protection, and Safe Torque Off (STO) input lines

ZeroErr ePower Industrial Switch-Mode Power Supplies (400 W, 800 W, 1500 W)

ZeroErr Control ePower series industrial switch-mode power supplies are tailored to meet the transient electrical demands of multi-axis articulated robots powered by eRob joint modules.

Converting universal single-phase input from 90 to 264 VAC into tightly regulated 24 VDC or 48 VDC outputs, ePower units achieve active power factor correction (PFC > 0.98) and conversion efficiencies up to 94%.

Engineered to absorb steep dynamic load steps during robot acceleration and deceleration cycles, they sustain up to 200% peak current surges without triggering DC bus voltage sags.

• Power ratings and output rails: industrial power modules spanning 400 W, 800 W, and 1,500 W with regulated 24 VDC or 48 VDC bus outputs
• High electrical efficiency: conversion efficiency up to 93–94% with active power factor correction (PFC) complying with Class B EMC emission thresholds
• Transient surge tolerance: supports instantaneous peak current overloads up to 200% for 3–5 seconds during simultaneous multi-axis robotic motion
• Mechanical housing format: heavy-duty metal chassis supporting standard DIN-rail and cabinet panel mounting with smart thermal airflow control

ZeroErr ePower-Board Dynamic Braking and Energy Regeneration Modules

ZeroErr Control ePower-Board energy dissipation modules provide critical DC bus voltage protection across multi-axis robotic arms.

When robot joints undergo rapid deceleration, descending motions, or emergency stops, the permanent-magnet servo motors operate as generators, pumping kinetic energy back into the DC power rail.

The ePower-Board continuously monitors the bus potential; once voltage rises above safe thresholds (52–56 VDC), onboard comparator circuitry triggers high-speed power MOSFET switches, diverting excess regenerative energy into thermal braking resistors.

• High-speed bus voltage supervision: real-time monitoring of DC bus rails with microsecond switching latency preventing regenerative overvoltage trips
• Integrated dynamic braking resistors: reliable thermal dissipation of regenerated energy through heavy-duty ceramic power resistors equipped with thermal cutoffs
• Power supply and driver protection: shields switch-mode power supplies from destructive reverse currents and eliminates servo drive overvoltage fault shutdowns
• Plug-and-play installation: compact PCB footprint with heavy-duty screw terminals for parallel integration between ePower supplies and eRob joint clusters

ZeroErr Dedicated eRob Hybrid Cables and Hardware Debugging Tools (ZeroErr Studio)

Continuous reliability across articulated robotic manipulators requires industrial-grade inter-joint cabling and streamlined commissioning tools.

ZeroErr Control manufactures specialized high-flex eRob hybrid cable assemblies uniting DC power conductors (AWG 16–20) and shielded EtherCAT/CANopen twisted pairs inside a heavy-duty polyurethane (PUR) outer jacket.

Rated for over 10 million torsional and flexural cycles inside hollow bores and drag chains, these cables resist abrasion and oil exposure.

For configuration, the USB eRob Debugger tool interfaces joint modules with PCs, facilitating PID tuning, zero-point calibration, and real-time current logging via ZeroErr Studio and Beckhoff TwinCAT.

• Hybrid single-cable architecture: integrated DC bus power delivery and shielded industrial communication pairs encased in rugged wear-resistant PUR sheaths
• Exceptional flex and torsional endurance: certified for over 10 million continuous flex cycles inside internal hollow shafts and dynamic cable carriers
• Isolated eRob Debugger hardware: plug-and-play USB interface adapter providing galvanic isolation for commissioning and servo diagnostics
• Unified configuration software suite: seamless parameterization via ZeroErr Studio and full compatibility with Beckhoff TwinCAT and CODESYS runtimes