Coolmay C660 Series High-Performance Servo Delivers 3.5 kHz Response and ≤5 Arc-Sec Accuracy

Coolmay C660 Series High-Performance Servo Delivers 3.5 kHz Response and ≤5 Arc-Sec Accuracy

Automation equipment today demands more from its servo systems than ever before. That pressure is not simply higher customer expectations — it reflects a steady tightening of production precision standards across every sector Coolmay serves. Servo performance directly determines the positioning accuracy a machine holds over long-term operation — in high-speed, high-precision work it sets the ceiling on what the machine can do. Coolmay's answer is the C660 Series High-Performance Servo, a comprehensive upgrade over the previous servo generation, built specifically for high-speed, high-precision and multi-axis automation.

Why servo performance has become the bottleneck

As cycle times shorten, the margin for positional error collapses with them. A machine that drifts by a few arc-seconds over an eight-hour shift can still fail in production, because the error accumulates quietly and surfaces as out-of-tolerance parts and scrap. Legacy servo platforms, running on older control hardware with narrower speed-loop bandwidth, struggle to hold that line once the machine is pushed toward its rated speed.

The C660 Series was engineered around that exact failure mode: not peak precision on a test bench, but repeatable precision under continuous high-speed duty.

23-bit absolute encoder: precision that holds over long runs

At the heart of the C660 Series is a 23-bit high-precision absolute encoder delivering precise, real-time position feedback. Absolute feedback means the drive always knows its true position without a homing routine, so start-up is immediate and position data survives power loss. More importantly, encoder resolution and stability let the system minimise positioning deviation and drift during continuous high-speed operation. The result is a positioning accuracy of ≤5 arc-sec — accuracy that is maintained over a shift, not just at the moment of commissioning.

A next-generation hardware platform: 2.4 times the processing headroom

Precision is only useful if the drive can react in time. The C660 Series runs on a completely new-generation hardware platform whose chip clock frequency is 2.4 times that of the previous servo platform. That additional processing headroom is spent where it matters: the speed-loop response bandwidth now reaches up to 3.5 kHz, which translates into faster response to load changes and higher overall operating efficiency. For machine builders, this separates a servo that merely holds position from one that tracks an aggressive motion profile without lag, overshoot or wasting cycle time in settling.

FFT multi-point notch filtering: solving vibration and unstable speed

Mechanical resonance is the most common cause of the two symptoms machine builders report most often: operational vibration and unstable speed. When a servo's control loop excites a structural resonance in the machine frame, ball screw or belt drive, the result is audible noise, surface marks on the workpiece, shortened mechanical life and a speed that will not settle.

The C660 Series addresses this with an FFT multi-point notch filter. By analysing the vibration frequency content and placing multiple notch points on the identified resonance peaks, the drive suppresses mechanical resonance rather than masking it with reduced gain. Machine operation becomes noticeably smoother, and engineers regain the loop gain that would otherwise have been dialled back purely to keep the machine stable.

EtherCAT and multi-axis synchronization

Modern automation is rarely single-axis. Gantries, packaging stations, winding systems and CNC-style motion platforms all depend on several axes arriving at the right place at the same moment. The C660 Series supports EtherCAT bus communication, making it suitable for tightly synchronized multi-axis control with deterministic cycle times. Standard RJ45 industrial Ethernet interfaces simplify cabinet wiring and shorten fault-finding — one cable standard, and diagnostics engineers can read with familiar tools.

Integrated dynamic braking for safer, less damaging stops

Unexpected events are unavoidable in real production. The C660 Series integrates dynamic braking, so that when an alarm occurs or power is lost, the motor can stop quickly and smoothly instead of coasting or dropping abruptly. This reduces mechanical impact on the axis, gearbox and workpiece, and lowers the risk of equipment damage and repair cost. For high-inertia loads and vertical axes in particular, it is a meaningful margin of safety designed in rather than added on.

Built for complex automation applications

The C660 Series High-Performance Servo is purpose-built for high-speed, high-precision, multi-axis motion control — the profile of the most demanding automation projects in packaging, plastics, electronics assembly, lithium battery equipment and general special-purpose machinery. It represents a full generational upgrade over the previous servo platform, and it is backed by Coolmay's fifteen-plus years of industrial control engineering for equipment manufacturers exporting to Europe, North America, Southeast Asia and the Middle East.

Availability and next steps

The C660 Series is available for sample evaluation and volume orders, with OEM configuration, technical documentation and export-market support. Machine builders working on high-speed, high-precision applications can request a servo sizing review from the Coolmay engineering team.

Take the next step: send your axis specification — load inertia, rated and peak torque, maximum speed, required positioning accuracy and fieldbus architecture — and Coolmay will return a matched C660 Series configuration plus a projected performance comparison against your current servo platform.