Coreless BLDC Motors for Galvo Scanner Systems

At Scanner Optics, our motion control systems include not only galvanometer scanners but also a range of advanced BLDC motors, most notably coreless brushless DC motors (coreless BLDC motors). These compact, high-performance motors are integral to enhancing the speed, responsiveness, and accuracy of our scanning systems.

Innovation of Coreless Brushless DC Motors

A coreless brushless DC motor is built around permanent magnets on the rotor and electromagnetic windings on the stator. An electronic controller sequentially energizes windings to produce rotating magnetic fields and torque.Unlike traditional BLDC motors, coreless BLDC motors eliminate the iron core in the rotor. Instead, the rotor winding is self-supporting, reducing inertia, cogging torque, and electromagnetic losses.

Key Benefits of Coreless BLDC Motors

Ultra‑fast response and acceleration due to extremely low inertia Smooth, cog‑free operation, minimizing vibration and torque ripple

High efficiency and low heat, with up to 90%+ power efficiency 

Compact and lightweight, ideal for space‑constrained designs, small robotics, and handheld devices

Low electromagnetic interference (EMI), important for medical imaging and sensitive electronics 

Coreless BLDC Motors from Scanner Optics

Our coreless brushless motors power fast and precise galvanometer motion—with minimal inertia and high repeatability, they match mirror and scan-head loads perfectly, improving system dynamics. In laser marking, drilling, and welding, coreless BLDC motors ensure ultra‑fast mirror positioning and stable motion control.

Why Coreless BLDC Motors are Ideal for Galvo Scanners?

Ultra-Low Rotor Inertia for Fast Response

Coreless motors cut rotor inertia by over 30% compared with traditional BLDC designs. That means faster start/stop behavior and high-speed microsecond control—critical in galvo-based laser systems where mirror angle accuracy and speed determine scan quality. 

Cog-free Motion Ensures Smooth Scanning

With no iron core, coreless BLDC motors eliminate cogging torque entirely, which is a common source of vibration and scan inaccuracies in conventional motors. This translates to smoother, more linear mirror movements.

Enhanced Precision and Consistency

Galvo scanners demand tight angular positioning. Coreless motors boast excellent linearity and low hysteresis, enabling stable beam positioning and repeatable performance, especially important in medical aesthetic lasers or ophthalmic imaging systems.

Lower Noise and Thermal Load

The absence of iron reduces eddy current losses and electromagnetic noise. Coreless motors generate less heat and operate quietly.

High Efficiency and Energy Savings

With simplified winding design and less electromagnetic loss, coreless motors often has higher efficiency. This means lower power consumption and improved system uptime in continuous scanning operations.

Coreless BLDC Motor Application in Scanner Optics’ Galvo Systems

Scanner Optics systems leverage coreless BLDC brushless motors to drive mirror movement with high speed and precision. This enables crisp markings and clean welds even in micro-scale manufacturing workflows such as mobile phone components, battery manufacturing, or electronic parts processing.

In aesthetic laser treatments and eye diagnostics, system accuracy directly affects patient outcomes. Coreless motors provide stable, low‑EMI scanning and fast response, supporting fine control over light delivery during procedures and imaging.

Scanner Optics integrates coreless motor modules to offer dynamic focusing or multi-axis galvo assemblies. These systems support complex 3D scanning or large-area marking with sub‑millisecond responsiveness.

While our primary focus is galvanometer scanner systems, we design and integrate voice coil motors and BLDC motors into custom scanning and motion systems such as dynamic focusing modules (e.g., VCM G1) for 3D laser marking, printing, and large-area processing.

At Scanner Optics, our commitment to integrating coreless BLDC motor technology ensures scanning systems that deliver ultra-fast response, high precision, low vibration, and compact form factors. Whether embedded in galvanometers or precision motion systems, these motors elevate performance in industries like medical imaging, laser processing, robotics, and micro‑automation. 

For custom motion system needs or detailed specifications on our BLDC motor supply, contact Scanner Optics now to learn more about integrating coreless BLDC motors into your galvo scanner systems.  Contact us

FAQs of Coreless BLDC Motor

What Common Issues Arise in Galvo Scanner Using Coreless BLDC Motors?

Coreless BLDC galvo system may experience issues such as motor non‑locking, no movement, whistling noise, or loss of laser output. These typically stem from:

Poor signal wiring or driver connections

Faulty driver board or motor

Misconfigured marking software

Dirty, misaligned, or fallen-off mirrors

How to Address Whistling Sounds or Heat Issues?

A persistent whistling sound may signal signal noise or improper potentiometer settings on the driver filter board. If internal noise persists, service from the supplier is recommended.

Continuous high noise or overheating suggests wiring misconnection, mirror instability, or power supply issues—inspect the cables, reflectors, and grounding closely. 

How Does a Coreless BLDC Motor Improve Galvo Scanner Performance?

Rapid acceleration and microsecond-level step response

Smooth, cog-free mirror movement

High linearity and repeatable accuracy

Quiet, cool, and efficient operation

All of which elevate laser scanning quality, especially in medical, micro-machining, and high-precision imaging applications.