TinyG failing at corners

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  • December 23, 2017 at 1:25 pm #10713
    Gaylord
    Member

    I’m getting errors and the program won’t finish. I think it’s the board
    posx:3.078,posy:4.021,posz:0.463,vel:4.70
    qr:4

    tinyg [inch] ok>
    X2.476
    tinyg [inch] err: Arc specification error: X2.476

    tinyg [inch] ok>
    X3.05 9868IX3..4229 I0.0355 J0.0476 Y3.952.5 J0.04J0476 Z0.3968 I0.
    tinyg [inch] err: Bad number format: X3.05 9868IX3..4229 I0.0355 J0.0476 Y3.952.5 J0.04J0476 Z0.3968 I0.
    X3.0578 Y4.0476 Z0.3838 I0.0355 J0.0476
    tinyg [inch] ok>
    posx:3.075,posy:4.027,posz:0.463,vel:2.21
    posx:3.068,posy:4.038,posz:0.463,vel:0.09
    qr:4
    posx:3.059,posy:4.046,posz:0.462,vel:4.00
    qr:3
    posx:3.054,posy:4.050,posz:0.462,vel:4.59
    qr:4
    posx:3.045,posy:4.055,posz:0.461,vel:0.19
    posx:3.033,posy:4.058,posz:0.461,vel:2.37
    qr:4

    tinyg [inch] ok>
    X2.9868 Y376
    tinyg [inch] err: Arc specification error: X2.9868 Y376

    tinyg [inch] ok>
    X3.0578 Y4.0476 Z0.3317 I0.0355 J0.posx:3.026,posy:4.059,posz:0.461,vel:4.56
    qr:5
    posx:3.017,posy:4.059,posz:0.460,vel:0.19
    posx:3.004,posy:4.056,posz:0.460,vel:2.36
    qr:6
    posx:2.999,posy:4.054,posz:0.460,vel:4.71
    qr:7
    posx:2.990,posy:4.050,posz:0.459,vel:0.53
    posx:2.979,posy:4.041,posz:0.459,vel:0.89
    qr:8
    posx:2.974,posy:4.034,posz:0.459,vel:4.95
    qr:9
    posx:2.970,posy:4.028,posz:0.458,vel:2.53
    posx:2.965,posy:4.016,posz:0.458,vel:0.08
    qr:10
    posx:2.964,posy:4.006,posz:0.458,vel:4.42
    qr:11
    posx:2.963,posy:4.001,posz:0.457,vel:2.58
    posx:2.964,posy:3.988,posz:0.457,vel:0.12
    qr:12
    posx:2.967,posy:3.978,posz:0.457,vel:4.48
    qr:13
    posx:2.970,posy:3.973,posz:0.456,vel:3.26
    qr:14
    posx:2.976,posy:3.962,posz:0.456,vel:0.00
    posx:2.986,posy:3.953,posz:0.456,vel:2.90
    qr:15
    posx:2.992,posy:3.950,posz:0.455,vel:4.83
    qr:16
    posx:2.999,posy:3.945,posz:0.455,vel:0.53
    posx:3.013,posy:3.941,posz:0.455,vel:1.44
    qr:17
    posx:3.019,posy:3.941,posz:0.454,vel:4.67
    qr:18
    posx:3.027,posy:3.941,posz:0.454,vel:0.52
    posx:3.041,posy:3.944,posz:0.453,vel:1.43
    qr:19
    posx:3.047,posy:3.947,posz:0.453,vel:4.84
    qr:20
    posx:3.054,posy:3.950,posz:0.453,vel:1.11
    posx:3.065,posy:3.959,posz:0.452,vel:0.38
    qr:21
    posx:3.071,posy:3.967,posz:0.452,vel:4.69
    qr:22
    posx:3.075,posy:3.973,posz:0.452,vel:3.49
    posx:3.079,posy:3.984,posz:0.451,vel:0.00
    qr:23
    posx:3.081,posy:3.995,posz:0.451,vel:3.87
    qr:24
    posx:3.081,posy:4.000,posz:0.451,vel:3.48
    posx:3.080,posy:4.012,posz:0.450,vel:0.00
    qr:25
    posx:3.077,posy:4.023,posz:0.450,vel:3.92
    qr:26
    posx:3.074,posy:4.028,posz:0.450,vel:3.95
    qr:27
    posx:3.068,posy:4.038,posz:0.449,vel:0.05
    posx:3.058,posy:4.047,posz:0.449,vel:2.02
    qr:28
    posx:3.058,posy:4.048,posz:0.442,vel:5.07
    qr:29
    posz:0.433,vel:0.18
    posz:0.418,vel:3.04
    qr:30
    posz:0.413,vel:4.30
    qr:31
    posz:0.400,vel:0.00
    posz:0.388,vel:4.60
    posz:0.384,vel:0.00,stat:3
    qr:32
    g0 x0 y0 z0
    g0 x0 y0 z0
    tinyg [inch] ok>

    Can anyone assist

    December 23, 2017 at 4:45 pm #10714
    cmcgrath5035
    Moderator

    tinyG is Fussy about Arcs, the beginning of one arc and the end of the prior must meet certain criteria. Ultimately, this can be cause by a math precision error.

    Frequently, regenerating the design using mm, rather than inch, will resolve it.

    January 2, 2018 at 11:22 am #10718
    Gaylord
    Member

    Thanks for your previous troubleshooting help. I re-created the identical model in F360 after changing the preferences to mm. I did the CAM setup in mm and published the gcode. The simulation worked fine.

    I homed the machine, zeroed Z at WCS, work piece top using G92 Z0. I’m using G54.

    The machine stops at the same line stat:3 So I did a $sr and got:

    posx:76.833,posy:102.443,posz:9.031,vel:23.49
    posx:76.522,posy:102.607,posz:9.034,vel:18.84
    qr:30
    posx:76.313,posy:102.660,posz:9.036,vel:119.69
    qr:31
    posx:76.151,posy:102.696,posz:9.037,vel:36.07
    posx:75.805,posy:102.697,posz:9.040,vel:16.91
    posx:75.802,posy:102.697,posz:9.040,vel:0.00,stat:3
    qr:32
    $sr
    $sr
    tinyg [mm] err: Bad number format: X76.16 Y99.703 Z8$sr

    Your Thoughts?

    January 5, 2018 at 5:43 am #10724
    cmcgrath5035
    Moderator

    Hmmm, the only reference I see to “Bad number format” uses the example of G0 X1..23 rather than G01.23, basically a typo entering Gcode.
    That is unlikely with generated Gcode, e.g. F360.

    Are you able to locate a line of Gcode in your file that includes “X76.16 Y99.703 Z8”?
    Perhaps the offending “Bad Number” is near this line, sitting in the buffer having been pre-fetched by the planner.

    I recall (can’t locate the thread) someone commenting that using the F360 post processor to reduce the number of digits beyond the decimal point from 4 to 3 (or perhaps 2) resolved some unusual behavior.
    Also, these lines of Gcode from your first post in this thread do look strange

    tinyg [inch] ok>
    X3.05 9868IX3..4229 I0.0355 J0.0476 Y3.952.5 J0.04J0476 Z0.3968 I0.
    tinyg [inch] err: Bad number format: X3.05 9868IX3..4229 I0.0355 J0.0476 Y3.952.5 J0.04J0476 Z0.3968 I0.

    Can you provide a segment of your Gcode before and after the offending line?

    I don’t trust the auto formatting that goes on with this web tool – better to put the code in a Cloud drive text file and provide a URL

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