Configuration Guide for A6 Series Servo Motors Applied to CNC Machine Tools
Selection Recommendations
1) For feed axes of a small CNC lathe:
- X-axis: 0.75kW ~ 1kW servo motor recommended.
- Z-axis: Due to the need to overcome gravity or large axial cutting forces, a 1kW ~ 2kW servo motor is recommended. Additionally, a servo motor with a brake is strongly recommended for the Z-axis to ensure position holding and prevent dropping when power is lost.
- Control mode: The A6-EC series (EtherCAT high-speed bus) can be selected.
2) For machining feed axes:
- It is recommended to choose an AC servo motor of 1kW or higher based on the load condition of the worktable.
- Similarly, if it involves a Z-axis motor, a brake-equipped motor must be selected.
- Control mode: The A6-PN series (PROFINET high-speed bus) can be selected.
Gain Adjustment
- C01.00 - Position Loop Gain: Recommended setting is 30-50. For machine tools with high rigidity requirements, it is advised to increase gradually to avoid oscillations caused by excessive gain.
- C01.01 - Speed Loop Gain: Recommended setting is 300~500Hz. For machine tools with heavy cutting loads, set around 300Hz. For high-speed, no-load machine tools, set up to 500Hz.
- C01.02 - Speed Loop Integration Time Constant: Recommended setting is 20~50ms. For low-speed, prone-to-creeping scenarios, you can decrease the value appropriately to improve servo motor response.
For Spindle Applications
If you intend to use a servo on the CNC machine tool's spindle, the A6-RS series, which supports analog speed control, is very suitable.
A reference video on analog speed control setup is available here:
Updated on: 28/05/2026
Thank you!