Is Slight Motor Heating Normal When the MF Port is Activated on Y-Series Drives?
Working Principle of the MF+/MF- Input:
When an active DC voltage signal (e.g., 24V) is applied to this port, the output power transistors of the driver are turned off, cutting off the current to the stepper motor windings. At this point, the motor windings are in a free state (no holding torque is generated), and the motor shaft can be rotated easily.
Generally, slight residual heating in the motor can be attributed to the following reasons:
- Time Required for Heat Dissipation:
Even when the MF signal completely cuts off the current, the motor itself—as a metal object—has a certain heat capacity. If the motor had been operating for some time before the enable was cut off and had reached a higher temperature, it will take some time to cool down naturally to ambient temperature. The residual warmth you feel may simply be heat that has not yet dissipated.
- Environmental and Installation Factors:
Motor heat dissipation is directly influenced by its mounting method, surrounding airflow (convection), and ambient temperature. If the motor is installed in an enclosed or poorly ventilated space, heat dissipation will be slower, and the motor may feel warm for a longer period.
Updated on: 28/11/2025
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