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DQ542MA settings for NEMA23 High Tork motors

Discussion in 'Other Builds' started by Srednasoft, May 4, 2020.

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  1. Srednasoft

    Srednasoft New
    Builder

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    Hi,
    I’m not sure about the dip switch settings on the DQ542MA stepper driver, regarding the Amps settings for the motor. My motors are the NEMA23 MT-2315HS300AW and the specs says that it uses 3.0 Amps/Phase. Is that peak or RMS? The table on the stepper driver has columns for peak and RMS. Highest selection is Peak 4.2/RMS 3.0

    The pulse/rev settings is another matter. I have read that 1600 is a correct/good setting for this motor?

    The third issue is the two motors for the Y-axis. They have each a DQ542MA stepper driver. Are they both going to be connected to the Y on the controller card or do I activate the 4th axis option (A-axis on my CNC Phoenix controller by Hayri Uygur)

    So, will my 24V 350W 14.6A powersupply handle this configuration?


    D41672D7-8676-41B5-AB20-B7060A4C61E7.jpeg 09F12B34-532D-493E-90B9-46368B2269CC.jpeg C219F9CE-595C-4DCF-A0C0-6EB3340922BD.jpeg image.jpg
     
    #1 Srednasoft, May 4, 2020
  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

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    Set it to 2.37A to begin (no one needs 100% current, it just heats the motors up more than needed)

    SW1 OFF
    SW2 OFF
    SW3 ON
    SW4 ON (Half current switch, if you set it off then 2.84/2 = 1.42A)

    1/8th (our machine profiles default to 1/8th) will be fine

    Either 1/8th
    SW5 ON
    SW6 ON
    SW7 OFF
    SW8 ON

    Or 1/16th
    SW5 OFF
    SW6 OFF
    SW7 ON
    SW8 ON

    Yes
    (3A rating is at the 3v coil rating, = 9w per winding x 2 windings = 18w per motor x 4 motors = 72w draw x 60% effiency worst case = 115w+-)
     
    #2 Peter Van Der Walt, May 4, 2020
    Shaun Visser, Renaud Bourassa and Srednasoft like this.
  3. P01

    P01 New
    Builder

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    Hi, I have a similar question. In my case I use Nema 17 which has 1.68A / phase. Is it RMS or Peak?
    I ask because I have to set it to 1.36A RMS (1.92A Peak) to move correctly the load I have (with high accelerations and speeds).
    The motor is running only slightly warm. It is the same type of motor as on the openbuildspartstore web.
    Is there any danger operating it in this configuration?
     
    #3 P01, Nov 23, 2020
  4. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

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    Peak. Exceeding that causes damage. Feel if motors overheat, if not dial in a little more
     
    #4 Peter Van Der Walt, Nov 23, 2020

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