chmr

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  • June 2, 2014 at 3:46 am in reply to: 429.04 motor power management #6057
    chmr
    Member

    Thank you for your replies. Could you elaborate a bit what these settings are supposed to do when the implementation is finished?

    Another quick question about the motor LEDs on the V8 board: I sometimes see that a LED is dark although the motor is enabled. This is especially evident on the dual-motor axis, when one LED is lit and the other one not.
    Do the LEDs only show the current flowing through one of the motor windings?

    June 2, 2014 at 3:23 am in reply to: A Bad Day in the Shop #6056
    chmr
    Member

    Hi, I tried to reproduce your problem. The “unusual noises” sound like someone hitting the axis with a hammer, and the machine is nearly rocked off it’s stand. No wonder it misses steps.

    In trying to narrow down the problem, I tried to make small moves with different settings for speed and jerk, and measure the actual travel distance. See for yourself: <embed width=”640″ height=”640″ type=”application/x-shockwave-flash” src=”http://v8.tinypic.com/player.swf?file=30vd72g&s=8″><br&gt;Original Video

    The upper part is coolterm, lower part is the output of a USB microscope mounted next to my spindle. When vmax is 11999 or lower, moves of 1mm are executed correctly.
    When vmax is set to 12000 or above, moves of 1mm do not have a accelleration/deceleration phase, they just seem to travel a single motor step (0.12mm with my settings). After two moves of 1mm each and a move of 2mm back, the spindle is not back at 0 as it thinks, it is at -1.8.

    The really strange thing is that the difference between 11999 and 12000 vmax. Might be dependent on motor settings tho. At the lower speed, the problem still occurs at moves of 0.5mm.

    May 30, 2014 at 9:59 am in reply to: Nema 23 motors won't spin just make noise, help please. #6025
    chmr
    Member

    Hi Lchampag,
    When I first fired up Tinyg on my shapeoko2, I was experiencing similar problems as you described. This was caused by wrong speed settings for the motor. Because you said that the motors work during homing (slow speed) and running a job (feed speed) might also point in that direction.
    Recheck the axis and motor settings, especially $1sa, $1tr, $xvm, $xjm. More information at https://github.com/synthetos/TinyG/wiki/TinyG-Configuration
    The difference between “typical” Nema17 and Nema23 motors is the step angle, most Nema17 seem to have 1.8 degrees, most Nema23 0.9 degrees. Triple-check the setting of $1sa and the technical data of your motors.
    Start from lower speeds and work your way up; Reducing the microsteps ($1mi) also helps to achieve higher speeds.

    For information about Gcode, I found the following useful:

    Good luck,
    Chris

    • This reply was modified 10 years, 3 months ago by chmr. Reason: amended link
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