Stepper motor for 3D printer

The invention discloses a stepper motor for a 3D printer. The stepper motor comprises a 3D printer support, wherein a stepper motor fixing frame is arranged above the 3D printer support; a stepper motor main body is arranged in the stepper motor fixing frame; a screw rod is arranged at one end of the stepper motor main body, and a temperature alarming module is arranged at the other end of the stepper motor main body; a nut sleeve is arranged on the screw rod; a temperature sensor is arranged at one end close to the stepper motor main body, of the temperature alarming module; and a wiring port is formed in one end of one side of the stepper motor main body. The stepper motor disclosed by the invention has the following beneficial effects: the temperature of the stepper motor main body is detected by the temperature sensor, when the detected temperature is greater than a set value, a single chip microcomputer controls a loudspeaker to run to make an alarming sound of beeps and remind a user of the too high tem