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Matching motor, driver and PSU

Discussion in 'Motors' started by AleksandarNedic, Feb 17, 2018.

  1. AleksandarNedic


    Jan 17, 2018
    Likes Received:
    I am new here, and sorry for less knowledge about CNC electronics.
    I recently bought 4 Nema23 step motors 0.9deg, 2.8A/phase, inductance 5.6mH/phase, nominal voltage 3.2V/phase, resistance 1.13 Ohm/phase, holding torque 18kgcm, detent torque 680gcm.
    Using formula that max voltage for motor is 32*sqrt (L), L is inductance in mH, I found that maximal voltage for stepper is around 76 V. Safe area would be about 70V.
    I chose driver Leadshire driver DM856, with voltage range to 80V.
    I chose PSU DC 70V 14.3A. (2/3*4*2.8=7,6 A).
    Could I use this driver and PSU for those motors?
    Besides, in many specifications I found that the stepper driver JK1545 and PSU of 36V is enough.
    Should I use JK1545 with 36V (or 48V) PSU, or DM856 and 70V PSU? What is better to me?
    I am afraid that I am burn down my steppers with 70V PSU.
  2. Gooshpoo

    Gooshpoo Well-Known

    Jul 17, 2017
    Likes Received:
    More voltage = more torque but less accuracy its best to get something in the middle. if your going to be microstepping.

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