TinyG stops responding when I attempt to move A-axis

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  • April 10, 2016 at 10:18 pm #9548
    ehrichweiss
    Member

    oh, forgot to answer that last bit. I’m planning on cutting wood and metal.

    April 10, 2016 at 10:30 pm #9549
    cmcgrath5035
    Moderator

    The Green LEDs you mention are simply connected to one of the motor windings.
    They flicker, mostly for entertainment. If the motor stops rotating with a particular winding in a reverse polarity state, the LED will be extinguished, but motor still energized. Summary – flicker is normal.

    I see you are already trying $4mi=1, I was going to suggest that.

    What command are you issuing to get the motor to move?

    e.g. G0 A3000, expecting about 10 stepper revolutions?

    If I assume that A rotated normally when disconnected , it does sound like the stepper does not have enough torque to overcome the load presented by the mechanism.

    April 11, 2016 at 10:30 am #9550
    ehrichweiss
    Member

    Solved it!!

    First thing, I watched this https://www.youtube.com/watch?v=K_r8y_T8rsY which got me to thinking maybe I’d been setting my $afr and $avm waaaay too low. So I tried that and it moved stronger but still the same nonsense. Then I realized that I’d never actually verified that I had matching pairs of windings for A. I’d verified X, and Y&Z worked with the same color scheme so I assumed A was correct as well. I remembered that I had some issues out of A with Mach3 and LinuxCNC but I had other issues out of both of those so I just figured it was also with them. I think someone wired my stepper connector wrong because there’s no way that the driver for A is wired that differently.

    Sorry to drag you through something that I should know is a n00b error. They swore they tested this thing at the factory, I’m not convinced of that.

    April 11, 2016 at 10:49 pm #9551
    cmcgrath5035
    Moderator

    Good news!

    Post your results as they mature – there is not a great body of experience doing what you are doing.

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