Problem with Fusion360 on Haas machine... Z height to start is too low.
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  1. #1
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    Default Problem with Fusion360 on Haas machine... Z height to start is too low.

    I've run into a problem and I can't figure it out. And of course I am under the gun on a deadline.

    Using Fusion360 I have a CAM file to drill some holes in a part. The part is tall, and the drill is long.

    On the Haas I have my tool loaded (T3) and it is ABOVE my part and to the left (+x). G54 is set correctly at the TOP of the part.

    But as soon as I Cycle Start it lowers the drill and start moving X positive... and it's going to crash. I've caught it and stared at my code, but I can't see why it is lowering the tool below the clearance/retract/feed heights.

    Here's my .nc file:
    And pasted is a screen shot of the heights tab.

    Any ideas?

    screen-shot-2021-06-24-12.05.17-am.jpg

    I can upload a video if that helps, but it's fairly straight forward. First thing the Haas does is lower the Z. Then start moving left.


    O62302 (Drill Final)
    (Using high feed G1 F500. instead of G0.)
    (T3 D=0.4375 CR=0. TAPER=118deg - ZMIN=-1.2314 - drill)
    N10 G90 G94 G17
    N15 G20
    N20 G53 G0 Z0.

    (Drill29 2)
    N25 T3 M6
    N30 S900 M3
    N35 G54
    N40 M8
    N45 G0 X4.25 Y3.969
    N50 G43 Z1.25 H3
    N55 G0 Z0.6
    N60 G98 G83 X4.25 Y3.969 Z-1.2314 R0.6 Q0.1 F4.
    N65 Y0.469
    N70 Y-0.469
    N75 Y-3.969
    N80 X-4.25
    N85 Y-0.469
    N90 Y0.469
    N95 Y3.969
    N100 G80
    N105 G0 Z1.25

    N110 M5
    N115 M9
    N120 G53 G0 Z0.
    N125 X0.
    N130 G53 G0 Y0.
    N135 M30

    %
    Attached Thumbnails Attached Thumbnails screen-shot-2021-06-24-12.03.53-am.jpg  

  2. #2
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    Default

    Nothing wrong with that program, make sure your "H" offset is set correctly

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    Default

    Code looks fine. There has to be a problem with you not touching off the tool correctly or G54 not setup correctly.

  4. #4
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    Quote Originally Posted by HappyHapgood View Post
    I've run into a problem and I can't figure it out. And of course I am under the gun on a deadline.

    Using Fusion360 I have a CAM file to drill some holes in a part. The part is tall, and the drill is long.

    On the Haas I have my tool loaded (T3) and it is ABOVE my part and to the left (+x). G54 is set correctly at the TOP of the part.

    But as soon as I Cycle Start it lowers the drill and start moving X positive... and it's going to crash. I've caught it and stared at my code, but I can't see why it is lowering the tool below the clearance/retract/feed heights.

    Here's my .nc file:
    And pasted is a screen shot of the heights tab.

    Any ideas?

    screen-shot-2021-06-24-12.05.17-am.jpg

    I can upload a video if that helps, but it's fairly straight forward. First thing the Haas does is lower the Z. Then start moving left.


    O62302 (Drill Final)
    (Using high feed G1 F500. instead of G0.)
    (T3 D=0.4375 CR=0. TAPER=118deg - ZMIN=-1.2314 - drill)
    N10 G90 G94 G17
    N15 G20
    N20 G53 G0 Z0.

    (Drill29 2)
    N25 T3 M6
    N30 S900 M3
    N35 G54
    N40 M8
    N45 G0 X4.25 Y3.969
    N50 G43 Z1.25 H3
    N55 G0 Z0.6
    N60 G98 G83 X4.25 Y3.969 Z-1.2314 R0.6 Q0.1 F4.
    N65 Y0.469
    N70 Y-0.469
    N75 Y-3.969
    N80 X-4.25
    N85 Y-0.469
    N90 Y0.469
    N95 Y3.969
    N100 G80
    N105 G0 Z1.25

    N110 M5
    N115 M9
    N120 G53 G0 Z0.
    N125 X0.
    N130 G53 G0 Y0.
    N135 M30

    %
    Have you tried this in single block. I assume the head is dropping on the G53 Z0 line. Likely you just don't have enough travel. I believe G53 z0 is below the max z height the machine can travel. In MDI crank the head up as far as it will go and command the G53 z0 and see if the head drops

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    Unless I misunderstood your problem, what's up with this:

    (Drill29 2)
    N25 T3 M6
    N30 S900 M3
    N35 G54
    N40 M8
    N45 G0 X4.25 Y3.969
    N50 G43 Z1.25 H3 <------????

    How' bout this instead:

    (Drill29 2)
    T3 M6
    G00 G43 H03 D03 (<-------!!!!)
    S900 M3
    G54
    N40 M8
    G00 Z1.25 (<-----!!!)
    G0 X4.25 Y3.969

    IOW, you were moving in X and Y before activating the length offset.
    If you are normally doing it that way, I guess the machine won't bitch and it won't be an issue with collision if there is enough albow room in Z.
    Now that the part is tall and tool is long, you've just got bitten in the ass for a perfectly good reason!

    I absolutely do not understand why would anyone not activate length and dia BEFORE any movement!
    My standard SOP is:

    Tx M06
    G00 G43 Hx Dx
    always always always always ....

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  9. #7
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    It's dropping PRIOR to the N45 line. Then starts to move sideways into the work. That's what I don't understand. I'll try your recommendation.

    And sorry to you and the others who replied... I've been so under the gun that I haven't typed replies. I have been working with someone from Phillips Corp (Haas vendor) and not yet resolved it either. I ended up manually doing the drilling with the machine (just annoying because can't peck and I had a BUNCH of them to do.

    Quote Originally Posted by csharp View Post
    Have you tried this in single block. I assume the head is dropping on the G53 Z0 line. Likely you just don't have enough travel. I believe G53 z0 is below the max z height the machine can travel. In MDI crank the head up as far as it will go and command the G53 z0 and see if the head drops

  10. #8
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    Really good point. As you may have noticed... I am not very experienced and still learning. I appreciate your clear guidance and will try this over the weekend.

    Unfortunately, my compressor crapped out yesterday (fortunately, I finished the job right as it was dying. Kinda humorous... I think it literally threw a rod. Made a most god-awful racket for about ten minutes (I was too desperate to finish the job to shut it down and after about 10 minutes it slowly quieted down. Figure it ate a rod or something. I'll be disassembling it this weekend to see if it's salvageable. It was a cheap unit that lasted 35 years so probably time to replace it anyway.

  11. #9
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    Yup. Threw a rod. Wedged a piston. Tore up the fan. But now fully overhauled and back to being very mediocre!

    img_1891.jpg
    img_1893.jpg


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