Analysis of Brake Release Failure in A6 Series Servo Motors
Servo motors are the core power components of modern high-precision automation equipment and motion control systems. Their closed-loop control mechanism provides unparalleled precision, responsiveness, and stability, making them indispensable in cutting-edge fields such as robotics, CNC machine tools, and precision manufacturing. Although they come with higher costs and relatively complex systems, servo motors deliver the optimal solution for applications requiring superior motion performance. With ongoing technological advancements, servo systems are evolving toward higher power density, greater integration (all-in-one motors), and increased intelligence and networking.
Below is an analysis of the reasons why the brake fails to release in the currently available A6 series servo motors.
- Check the wiring according to the manual
The wiring diagram is shown below (found on page 50 of the manual).
If the image is not clear enough, refer to this article.
Brake Wiring Instructions for A6 Series Servo Motors
- Directly Test with 24V Power Supply
Connect the motor directly to a 24V power supply and check if the motor shaft can be rotated by hand. This helps determine whether the issue is hardware-related.
- Verify DO Port Definition
After connecting to the software, open the interface shown below and check if the DO port definition has been modified.
Try redefining another DO port for the brake function to test whether the issue is with the DO3 port.
- Check the Software IO Settings
Ensure that the brake setting port (DO) shows a green light, indicating normal operation.
If the display shows "Brake Not Released" (as illustrated), verify the wiring or test with a different DO port assigned as the brake control.
- Check Motor Enable Status
On the A6 display, the disappearance of the red dot in the lower-left corner indicates the motor is enabled.
(Figure 1: Enabled / Figure 2: Not Enabled)
Summary
Follow these steps for systematic troubleshooting. If the issue persists after all checks, provide clear photos/videos and contact our technical support.
Updated on: 27/06/2025
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