New Build in New Hampshire

New Home Forum Mostly Printed CNC – MPCNC Your Builds – MPCNC New Build in New Hampshire

This topic contains 5 replies, has 4 voices, and was last updated by  Ryan 5 months, 1 week ago.

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  • #97273

    John
    Participant

    I still haven’t finished everything to my liking but it’s working amazingly well. Thanks to the people on this forum and Ryan for all the help getting me setup.

    IMG_20190416_193120
    IMG_20190416_193129

    I made some custom endstops even though I’m not really using them.

    IMG_20190416_193135
    IMG_20190416_193140

    And I’m already cutting aluminum, I plan to add some extra legs to help support the long spans.

    IMG_20190416_181621
    IMG_20190416_193003

    Now that I have a fan, anyone know how I can increase the motor current? I searched but didn’t find anything that didn’t involve compiling new firmware. I’d like the motors to have a little more torque cutting aluminum and not lose steps.

    1 user thanked author for this post.
    #97281

    Barry
    Participant

    If you’re running a rambo you’ll have to recompile I believe.  Also, careful you don’t get the motors too warm, you’ll soften the mounts.

     

    Also, fan needs to blow on the bottom of the board.  The stepper drivers use the board as a heat sync, not the top of the chips.

    1 user thanked author for this post.
    #97283

    John
    Participant

    Barry, thanks for the information. Good thing I have a CNC to make another bracket!

    #97290

    Jeffeb3
    Participant

    I think you can with M907:

    http://marlinfw.org/docs/gcode/M907.html

    Are you skipping steps?

    1 user thanked author for this post.
    #97340

    John
    Participant

    Thanks for the information! I didn’t lose steps on this cut (extremely small depth of cut), but on some previous attempts I did and the results seem to compound catastrophically.

    #97364

    Ryan
    Keymaster

    Proper chipload is more likely the cause of the missed steps. Do some faster wood testing, if you do not skips steps it is just CAM. Aluminum is very picky and has a tiny window of proper settings. Believe it or not a bigger chip (to a point) is easier on the tool and machine. Without knowing any specifics I would bet this is it.

    1 user thanked author for this post.
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