NEMA 17 Steppers won't move

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  • August 26, 2014 at 4:58 pm #6666
    WhiteElder
    Member

    Using Stepper motor – NEMA-17 size – 200 steps/rev, 12V 350mA from Adafruit. and using a command as “g1 f400 x50” the motor will spin when it is accelerating and decelerating but only whine during the move.

    What am I doing wrong?

    Motor Settings
    [1ma] m1 map to axis 0 [0=X,1=Y,2=Z…]
    [1sa] m1 step angle 1.800 deg
    [1tr] m1 travel per revolution 0.0492 in
    [1mi] m1 microsteps 8 [1,2,4,8]
    [1po] m1 polarity 0 [0=normal,1=reverse]
    [1pm] m1 power management 0 [0=remain powered,1=power down when idle]
    [1mp] m1 motor power level 1.000 [0.000=minimum, 1.000=maximum]

    August 26, 2014 at 6:38 pm #6668
    cmcgrath5035
    Moderator

    What tinyG FW build are you running?

    Screw machine? Screw binding?
    Have you played with the current pots?
    What PS voltage to tinyG?

    Your $1tr is reported in inches.
    Is your g1 command issued in inch mode (50 inches) or mm mode (50 mm = approx 2 in) ?

    August 27, 2014 at 12:44 am #6672
    alden
    Member

    Try this again in millimeters (G21). 400 Inches per minute is pretty fast! Or try a move at F15 if you stay in inches mode. Also, check your X axis settings. $x. It sounds like you have the maximum velocity and maximum feedrate settings too high for your motor. The motor will spin during acceleration, then stall, then spin again during deceleration.

    • This reply was modified 11 years, 6 months ago by alden.
    August 27, 2014 at 9:28 am #6674
    WhiteElder
    Member

    Thank you for the assistant. Using F15 worked to get the motor running. New to g code and just following the example in the Connecting Tinyg page.

    But to answer the questions I am using FV 0.97 on a TinyG V8 board. With a 24v/5a wago ps. I had played with the pots and with the feed but not down to 15.

    August 27, 2014 at 8:49 pm #6675
    cmcgrath5035
    Moderator

    WhiteElder
    I suggest caution when reading wiki and the Forum – most folks speak in mm mode, but it is often not obvious.
    For example, I missed the fact you were calling for F400 IPM, rather than mm/min.
    And, if you are running a screw machine, good to mention it.
    A typical (Shapeoko) machine moves 35.xx mm/rev, compared to your machine.

    Also, FV 0.97 does not say much either, better to report the FW build, eg build 435.10. FV are sort of major moves; we are still in the territory where the minor moves (builds) are important..

    But you are moving – have fun!

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