While the industry remains focused on response bandwidth, GTAKE has advanced spindle control to a new dimension of angular resolution. Powered by in-depth proprietary algorithms, the GK960M delivers arcsecond-level precision control, embedding a higher-precision, more reliable and process-optimized drive core for machining centers, CNC lathes and high-speed engraving & milling machines.
Machine tools are hailed as the “mother machines of industry”, and their spindle systems are undergoing an in-depth evolution from speed closed-loop control to position closed-loop control. Most conventional solutions boost performance by increasing the bandwidth and response speed of general-purpose servo drives. However, high-end precision machining demands far more than start-stop and rotational speed regulation; it requires refined angular decomposition and high-precision process control for every machining position. This necessitates spindle drives to depart from generic design, achieve deep coupling among encoders, motor winding and machining processes, and evolve into dedicated spindle control systems.
1.Coarse angular resolution creates blind spots in precision machining. High-gloss curved-surface machining, C-axis indexing and rigid tapping all require arcsecond-level accuracy. Conventional products adopt a general servo platform with external field bus, introducing extra latency during communication and interpolation. With fixed frequency division for encoder decoding, such drives suffer significant angular drift under low-speed operation and frequent reversing, resulting in inconsistent tool marks on finished workpieces.
2.Conflicting requirements between low-speed and high-speed winding make it hard for a single system to balance rigidity and dynamic performance. Heavy roughing demands high low-speed torque for heavy stock removal, while precision finishing relies on stable high-speed rotation to improve workpiece quality. The mainstream industry workaround is to deploy dual-winding motors or dedicated built-in motor spindles, which lead to complicated mechanical layout and high procurement & maintenance costs, failing to complete both rough and finish machining on one machine unit.
3.Shallow-level bus integration restricts commissioning efficiency due to protocol conversion. Multi-axis synchronized machining relies on high-speed synchronous fieldbus. Most competing products realize protocol conversion via external communication cards, resulting in a typical communication cycle of 500 μs to 1ms. They support only a limited range of CNC systems and require lengthy on-site installation and commissioning.
Equipped with a dedicated processing unit for encoder subdivision and paired with a 512-pole sine/cosine encoder, the drive achieves high-precision decoding up to 2.09 million pulses per revolution, with repeat positioning accuracy of 0.01° and indexing accuracy of 0.001°. It precisely controls tool entry and retraction angles to eliminate undesirable tool marks, improve surface finish of curved workpieces and guarantee consistent dimensional accuracy of finished parts.
Automatic star-delta winding switching allows a single motor to deliver high torque at low speeds and high power at high speeds. It outputs 200% rated torque at 0Hz and runs stably under high-speed field-weakening operation. Fully compatible with constant peripheral speed cutting, rigid tapping, C-axis indexing and other processes, one single hardware unit covers multiple machining procedures and simplifies overall machine mechanical design.
No external protocol converter required. The GK960M main board connects directly to fieldbus and participates in high-speed interpolation of the CNC system. Commissioning efficiency is improved by over 50%. When matched with mainstream domestic CNC systems, automatic parameter adaptation shortens the lead time from on-site installation to mass production significantly.
Optimized PWM modulation and dead-time compensation algorithms reduce harmonic heat generation at source, effectively restraining spindle temperature rise and thermal deformation. The spindle maintains stable rigidity and operational accuracy even under prolonged continuous production.
The GK900M Series is engineered for the relentless demands of modern machine-tool environments. Ultra-precise rotation control at maximum speed and torque guarantees parts with micron-level accuracy and mirror-smooth finishes—every cycle, every job. It also accelerates tapping cycles and other specialty machining operations, unlocking higher throughput without compromising quality.
