The tells a story of a specialized, low-power precision tool rather than a brute-force workhorse. With a holding torque of just 0.22 N·m and a current limit of 1.0A, it is the "fuel-efficient compact car" of the stepper world.
For standard A4988 or TMC2208/2225 drivers on Creality boards, a Vref of roughly 0.58V to 0.6V is often recommended to target ~0.8A current safely. bj42d15 26v10 stepper motor datasheet
If your driver is putting exactly 2.6V into this motor, . Stepper motors are current-driven, not voltage-driven. The "2.6V" is simply the voltage required to push 1.0 Amp of current through the 2.6-ohm coil when the motor is locked and stationary. The tells a story of a specialized, low-power