tinyg flys off

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  • December 9, 2014 at 9:23 pm #7144
    cswiger2
    Member

    Hmmm, just ran into a gcode sample to causes the tinyg to continue running off the work area – This is a name plate laser cut, and it gets so far then just loses it and starts drawing a line going off the work area.

    Have created a dropbox here:
    https://www.dropbox.com/sh/sv7q61xvz511j1h/AAAXU6oOOwBsMzSaN-hv80h2a?dl=0

    Tinyg was upgraded to edge 4.38.02 and the issue happens with both Chilipeppr and tgFX so it looks like a firmware issue. There’s a screen shot of nc-corrector and what it should look like (ToddName_ShouldLook.jpg), the gcode (NameTodd_0001a_F300.nc) and a screenshot of the tgfx display showing where at the top of the ‘f’ in Jeniffer it just stops drawing and goes into straight line mode to east north east. Also a photo of it shown better in a scrap piece of plywood.

    Repeatable, happened twice – again after reset and switching from Chilipeppr to tgFX.

    I’ll look at it closer in nc-corrector and try to find the code that breaks the controller.

    December 9, 2014 at 9:37 pm #7145
    cswiger2
    Member

    I’m no gcode expert but could it be these lines around the breaking point?

    G02 X81.9302 Y29.5684 I2.6065 J-4.7206
    G02 X82.0769 Y29.6052 I21644.8026 J-86331.8286 <– unusually large I/J
    G02 X82.2235 Y29.6415 I6.7647 J-26.9813

    Guess the way to find out is delete it, does not do much in nc-corrector.

    December 9, 2014 at 10:10 pm #7146
    cmcgrath5035
    Moderator

    I imported your nc file to a CAM simulator, looks OK here too.

    Good data set, I’ll refer it to the developers

    Have other jobs run OK on your setup?

    I’m curious – what is the A axis’ role here?
    Not that it should matter in this instance.

    December 9, 2014 at 10:37 pm #7148
    cswiger2
    Member

    Ah – still learning – this gcode was created from a ‘laserengraver’ plugin for Inkscape – deleting the line with the outsized I/J values:

    G02 X82.0769 Y29.6052 I21644.8026 J-86331.8286 <– unusually large I/J

    which barely draw anything in simulator – and it works fine. Tuned my setup with running the json serial port server on an old box in the garage and sending from Chilipepper on a more powerful notebook and worked perfectly several times (testing feed rates on different types of wood)

    Problem solved, happy lasing.

    Also, drawing tiny letters at 300mm / minute really makes the motors sing 😉 I’m impressed with this controller.

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