Bachin Stepper Motor 4240-15a (iOS)
[ I_max = V_ref \times 2 ] (if sense resistors = 0.1 Ω). For 1.5 A, set ( V_ref \approx 0.75 , V ).
What does this mean in practice? Holding torque is the amount of torque required to rotate the shaft of an energized motor. For a 3D printer moving a hotend or a laser engraver moving a gantry, 0.4Nm is generally sufficient. It provides enough force to move the axis quickly without "missing steps" (a phenomenon where the motor lags behind the commanded position, ruining the print or cut). bachin stepper motor 4240-15a
This motor follows the standard 42mm frame size, often referred to as a "42-40" motor due to its 40mm body length. NEMA 17 ( Body Length: Rated Current: [ I_max = V_ref \times 2 ] (if sense resistors = 0