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Stepper stalling at high speed with no load.

Discussion in 'CNC Mills/Routers' started by Chillimonster, Mar 6, 2018.

  1. Chillimonster

    Chillimonster Veteran
    Builder

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    Just sorting my electronics for my 1000 x 1000 Sphinx

    Laptop —-> Arduino —-> DQ542MA —-> Nema 23 (265 oz)

    First off thanks for a superb connection guide kyo.

    However I have a problem when doing a dry run set up on the bench

    On my old dual belted ox I could quite happily run at 4000mm min all day long. But I tended to run at 3500mm minute

    However not so on the current setup
    I have tried to run at 4000mm (loose steppers on bench) and it ramps up to speed and ‘stalls’

    Not that I am going to run it at that speed but still happens at 3500.

    At 3000mm min it will run fine and have done a full 30 min dry run on the bench without issues.

    I have tried different microstepping with the same results. And happens on all controllers / axis / steppers

    I am thinking that although the steppers are more powerful the pps is lower resulting in the problem I’m getting.

    Pics of old and new steppers attached.
     

    Attached Files:

  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
    Staff Member Moderator Resident Builder Project Maker Contest Winner! Builder

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    Whats your supply voltage? Higher voltage allows higher step rates. DQ542ma can handle up to 50v.
    Mm/min without steps-per-mm is also hard to judge, if you have a high steps per mm count still configured, your mm/min estimate would be off too
     
  3. Chillimonster

    Chillimonster Veteran
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    OB 24v psu

    Tried it on 1/2 microstepping and 1/4 and 1/8 on the dq542ma with the matching steps / mm with no difference.

    I have noticed that on the spec sheet all drivers will cope with 5000 pps.... except the 2.8a 265oz which is 2500 pps

    Could this be the issue?
     
  4. Gooshpoo

    Gooshpoo Veteran
    Builder

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    Make sure you have enough power to run the motors
    You could have a noise issue
    reconfigure your pulse timing if you can
     

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