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Thread: my cnc

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  1. #1
    hi guys i really hope you can help me with this one.
    i keep on trying to mill a sign or an 3d object but i keep having the same issue when ever i select my home position on my material this being wood when i load the file in to universal gcode sender pus run or send my machine starts running and mooving to its first position as it should but every time it plunges deep as far as it can go in to the wood it cant moove because of how deep its gone and burns the wood , no matter what i do it happens all the time so HEELLLLP! please

  2. #2
    Sounds like you need to take multiple passes. This will be dependant on your CAM software. Also CAM software often has a simulated preview that is worth watching before hitting the send as it can show these things up.

  3. #3
    Quote Originally Posted by SPIKE View Post
    hi guys i really hope you can help me with this one.
    i keep on trying to mill a sign or an 3d object but i keep having the same issue when ever i select my home position on my material this being wood when i load the file in to universal gcode sender pus run or send my machine starts running and mooving to its first position as it should but every time it plunges deep as far as it can go in to the wood it cant moove because of how deep its gone and burns the wood , no matter what i do it happens all the time so HEELLLLP! please
    Due to covid19 the crystal ball has lost it sheen.

    So how about giving some specs about the machine, what controller and the top few lines of the gcode.

    It would also help with a couple of pics would be nice as well
    ..Clive
    The more you know, The better you know, How little you know

  4. #4
    Thank you for your reply the cam software im using is fusion 360 and when i run a sim it runs normallyi dont get no errors and it starts of as it should do.
    Best regards Colin

  5. #5
    Quote Originally Posted by SPIKE View Post
    Thank you for your reply the cam software im using is fusion 360 and when i run a sim it runs normallyi dont get no errors and it starts of as it should do.
    Best regards Colin
    Fusion 360 is your CAD and cam software the controller could be mach3 or something else and what does your machine look like and how about posting your g code.
    ..Clive
    The more you know, The better you know, How little you know

  6. #6
    Thanks for your reply.
    i use fusion 360 cam software then i send the g-code to universal g-code sender i also have candle controller which cam with my grbl cnc diy 3018 pro router laser machine.
    Here are 2 images of my setup you can clearly see the plunge and burn mark from where it tries to travel along the x axis. Click image for larger version. 

Name:	My CNC 2.jpg 
Views:	81 
Size:	165.7 KB 
ID:	29466 i seem to have some issues let me know what you need and i will try to end it anoother way
    All the best Colin
    Hereis part of the gcode

    (1001)
    (T3 D=3. CR=2.5 - ZMIN=-15.249 - BULLNOSE END MILL)
    G21
    G40
    G49
    G80
    G90
    (WHEN USING FUSION 360 FOR PERSONAL USE, THE FEEDRATE OF)
    (RAPID MOVES IS REDUCED TO MATCH THE FEEDRATE OF CUTTING)
    (MOVES, WHICH CAN INCREASE MACHINING TIME. UNRESTRICTED RAPID)
    (MOVES ARE AVAILABLE WITH A FUSION 360 SUBSCRIPTION.)

    (POCKET1)
    M5
    T3 M6
    S10000 M3
    G54
    G0 B0. C0.
    G17
    G0 X46.236 Y22.824 Z12.
    G94 G1 Z3.289 F250.
    S750
    G2 X45.08 Y23.508 Z3.039 R0.95
    X45.764 Y24.664 Z2.789 R0.95
    X46.92 Y23.981 Z2.539 R0.95
    X46.236 Y22.824 Z2.289 R0.95
    X45.08 Y23.508 Z2.039 R0.95
    X45.764 Y24.664 Z1.789 R0.95
    X46.92 Y23.981 Z1.539 R0.95
    X46.236 Y22.824 Z1.289 R0.95
    X45.08 Y23.508 Z1.039 R0.95
    X45.764 Y24.664 Z0.789 R0.95
    X46.92 Y23.981 Z0.539 R0.95
    X46.236 Y22.824 Z0.289 R0.95
    X45.08 Y23.508 Z0.039 R0.95
    X45.764 Y24.664 Z-0.211 R0.95
    X46.92 Y23.981 Z-0.461 R0.95
    X46.236 Y22.824 Z-0.711 R0.95
    X46. Y22.794 Z-0.751 R0.95
    S10000
    G1 X2.023 F500.
    X2.022
    X1.981 Y22.795
    X1.98
    X1.939 Y22.797
    X1.937 Y22.798
    X1.896 Y22.801
    X1.895
    X1.853 Y22.805
    X1.852 Y22.806
    X1.811 Y22.811
    X1.81
    X1.768 Y22.818
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    X1.726 Y22.826
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    X1.682
    X1.641 Y22.847
    X1.639
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    X1.597 Y22.86
    X1.556 Y22.873
    X1.555
    X1.537 Y22.879
    X1.536 Y22.88
    X1.513 Y22.888
    X1.512
    X1.471 Y22.904
    X1.469 Y22.905
    X1.43 Y22.922
    X1.428
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    X1.343 Y22.963
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    X1.301 Y22.986
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    X1.265 Y23.007
    X1.264
    X1.258 Y23.011
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    X1.002
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    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	145877912_1489960821395404_6587348566778540639_n.jpg 
Views:	61 
Size:	181.3 KB 
ID:	29465  
    Last edited by SPIKE; 03-02-2021 at 05:21 PM.

  7. #7
    Thanks for your reply.
    i use fusion 360 cam software then i send the g-code to universal g-code sender i also have candle controller which cam with my grbl cnc diy 3018 pro router laser machine.
    Here are 2 images of my setup you can clearly see the plunge and burn mark from where it tries to travel along the x axis. Click image for larger version. Name: My CNC 2.jpg Views: 2 Size: 165.7 KB ID: 29466 i seem to have some issues let me know what you need and i will try to end it anoother way
    All the best Colin
    Hereis part of the gcode

    (1001)
    (T3 D=3. CR=2.5 - ZMIN=-15.249 - BULLNOSE END MILL)
    G21
    G40
    G49
    G80
    G90
    (WHEN USING FUSION 360 FOR PERSONAL USE, THE FEEDRATE OF)
    (RAPID MOVES IS REDUCED TO MATCH THE FEEDRATE OF CUTTING)
    (MOVES, WHICH CAN INCREASE MACHINING TIME. UNRESTRICTED RAPID)
    (MOVES ARE AVAILABLE WITH A FUSION 360 SUBSCRIPTION.)

    (POCKET1)
    M5
    T3 M6
    S10000 M3
    G54
    G0 B0. C0.
    G17
    G0 X46.236 Y22.824 Z12.
    G94 G1 Z3.289 F250.
    S750
    G2 X45.08 Y23.508 Z3.039 R0.95
    X45.764 Y24.664 Z2.789 R0.95
    X46.92 Y23.981 Z2.539 R0.95
    X46.236 Y22.824 Z2.289 R0.95
    X45.08 Y23.508 Z2.039 R0.95
    X45.764 Y24.664 Z1.789 R0.95
    X46.92 Y23.981 Z1.539 R0.95
    X46.236 Y22.824 Z1.289 R0.95
    X45.08 Y23.508 Z1.039 R0.95
    X45.764 Y24.664 Z0.789 R0.95
    X46.92 Y23.981 Z0.539 R0.95
    X46.236 Y22.824 Z0.289 R0.95
    X45.08 Y23.508 Z0.039 R0.95
    X45.764 Y24.664 Z-0.211 R0.95
    X46.92 Y23.981 Z-0.461 R0.95
    X46.236 Y22.824 Z-0.711 R0.95
    X46. Y22.794 Z-0.751 R0.95
    S10000
    G1 X2.023 F500.
    X2.022
    X1.981 Y22.795
    X1.98
    X1.939 Y22.797
    X1.937 Y22.798
    X1.896 Y22.801
    X1.895
    X1.853 Y22.805
    X1.852 Y22.806
    X1.811 Y22.811
    X1.81
    X1.768 Y22.818
    X1.767
    X1.726 Y22.826
    X1.724 Y22.827
    X1.683 Y22.836
    X1.682
    X1.641 Y22.847
    X1.639
    X1.598 Y22.859
    X1.597 Y22.86
    X1.556 Y22.873
    X1.555
    X1.537 Y22.879
    X1.536 Y22.88
    X1.513 Y22.888
    X1.512
    X1.471 Y22.904
    X1.469 Y22.905
    X1.43 Y22.922
    X1.428
    X1.386 Y22.942
    X1.384 Y22.943
    X1.343 Y22.963
    X1.342 Y22.964
    X1.301 Y22.986
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    X1.265 Y23.007
    X1.264
    X1.258 Y23.011
    X1.257 Y23.012
    X1.215 Y23.038
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    X1.137
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    X1.002
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    Y155.204
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    Y155.228
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  8. #8
    Ok
    Where and how do you touch off the part ie. at the bottom or the top and are you doing the same in fusion360 you generally touch off at the top off the part and that should be Z0.

    Also when you jog the Z axis down dose the DRO go more -ve or +ve ie. generally the Z should go -ve when going down.

    I have never used grbl.

    Also in the code you are using a ball nose cutter for a pocket you should be using an endmill . This is nothing to do with your problem though
    ..Clive
    The more you know, The better you know, How little you know

  9. #9
    T thanks again Clive I hope i dont get to be a pain with this. where you see thhe burn mark on the wood im bringing z to within a paper thickness for my zero i dont quite understand about touch off and the -ve when going down sorry i am disabled on alot of meds which causes me very bad memory so i have to wright alot down, my x is along the length of the material and y is the width, sometimes though it seems as if the z axis travels too far because when it lifts out of the wood it trvels almost to the top of its wall.
    Kind regards. Colin

  10. #10
    Quote Originally Posted by SPIKE View Post
    T thanks again Clive I hope i dont get to be a pain with this. where you see thhe burn mark on the wood im bringing z to within a paper thickness for my zero i dont quite understand about touch off and the -ve when going down sorry i am disabled on alot of meds which causes me very bad memory so i have to wright alot down, my x is along the length of the material and y is the width, sometimes though it seems as if the z axis travels too far because when it lifts out of the wood it trvels almost to the top of its wall.
    Kind regards. Colin
    Colin
    I am not familiar with your controller. Touch off means that you jog down to the top of the part and then press the touch off button this should then set the DRO (readout) to zero.

    Does the controller have a DRO . Can you post a picture of the controller?

    Perhaps somebody can chime in to help
    ..Clive
    The more you know, The better you know, How little you know

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