CNC Build Area

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This topic contains 7 replies, has 5 voices, and was last updated by  Hubert 7 months ago.

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  • #53332

    shannonb1
    Participant

    I am using endstops but how to I tell the marlin firmware how large my area is so thta when I home it knows to go to the end and stop? its going about half way now.

     

    Thanks

     

    #53334

    Ryan
    Keymaster

    Typically we do not use endstops.

    #53336

    SquidPlan
    Participant

    I don’t use end stops with my MPCNC, I just move the tool to a good place for 0, 0, 0 and reset those locations with the buttons in bCNC.  I don’t think your firmware would want to know the size of the work area directly, but maybe some CAM software has settings like that?  I didn’t find anything in EstlCam like that though.

    Knowing that I’m zeroed over a corner of the material and that what I’m going to cut will fit within the material seems to be enough at this point.

    I don’t know if this is helpful.  😛

    One last thing: the firmware might need to know if you’re homing to min or if you’re homing to max.

    #53342

    Barry
    Participant

    Usually if it’s stopping half way, or anywhere that’s not engaging the stops, you’re getting electrical interference.  Mine does that occasionally.  I just hit home again.  So far I’ve never had an issue during a cut, not sure if the firmware even recognizes end stop hit during a cut.

    #53346

    Hubert
    Participant

    There are defines X_BED_SIZE and Y_BED_SIZE in the configuration file that are used to set the coordinate limits (X_MAX_POS etc.). I think they get ignored unless you define software end stops.

    #53351

    shannonb1
    Participant

    You are correct, I was hopeful that I could have the software somehow help me to calculate that.

    #53352

    shannonb1
    Participant

    I dont have any electrical issues, that is not the cause.

    #53353

    Hubert
    Participant

    You are correct, I was hopeful that I could have the software somehow help me to calculate that.

    I believe the values are in millimeters. There is a comment in the code that you can also set/probe the values with the M211 command.

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