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Thread: Desktop Not Cutting Accurately Anymore....

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  1. #1
    Join Date
    Sep 2018
    Posts
    3

    Default Desktop Not Cutting Accurately Anymore....

    I have had my Desktop for right around 10 months now. All of a sudden I noticed that it was no longer cutting accurately. I went through all the maintenance, made sure everything was tight, but that didn't seem to help. Any ideas on what might be causing this issue? I have attached 2 pictures, one that I originally cut back in April that turned out perfect, and the most recent cut that looks absolutely terrible. Lines that are supposed to be straight are crooked, and also at the wrong angle.

    Most Recent Cut.jpg

    Original Cut.jpgOriginal Cut.jpg

  2. #2
    Join Date
    Dec 2005
    Location
    Pro Signs, Coal CIty IL
    Posts
    312

    Default

    Are all the lines on the same cut later? It looks like the larger object outline and the text and smaller objects are on 2 different layers (or 2 different grouped components) and one layer was bumped slightly? I have inadvertently moved a layer or group by accident just by not being careful moving the mouse around. Just a guess without seeing the actual file.

  3. #3
    Join Date
    Sep 2018
    Posts
    3

    Default

    It is on the same layer, it somehow lost position as well.

    I used the same program to cut both, nothing has changed except one was cut in April and one was cut last week

  4. #4
    Join Date
    May 2014
    Location
    MA
    Posts
    610

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    Are you sure that everything on your machine is tight? With the machine on do you feel any play when you grab on the bit and wiggle it?

    I'd try and cut out a 6" square and see what happens.

  5. #5
    Join Date
    Jan 2004
    Location
    Marietta GA
    Posts
    486

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    Quote Originally Posted by EricSchimel View Post
    Are you sure that everything on your machine is tight? With the machine on do you feel any play when you grab on the bit and wiggle it?

    I'd try and cut out a 6" square and see what happens.
    You used the same file to cut this as you used back in April?

  6. #6
    Join Date
    Jan 2004
    Location
    iBILD Solutions - Southern NJ
    Posts
    7,986

    Default

    I'd bet that your Y axis bearings are all jammed up with MOP grit etc. On the newest DTs. the bearings are somewhat covered, but prior to this, they were very susceptible to getting plugged up with swarf and chips.

    Move the gantry in and out using keypad mode while simultaneously feeling how smooth movement is from one side to the other. Do it over and over again until you are sure the bearings are running smoothly. If you suspect that one or both sides are jamming up, disconnect the leadscrew from the tombstone under the bed (just lift it up you'll see it) - then move the tool at will with no screw to hold it back. It should move smoothly without binding when pushed at the center of the gantry front to back.

    Report back and let us know what you found.
    High Definition 3D Laser Scanning Services - Advanced ShopBot CNC Training and Consultation - Vectric Custom Video Training IBILD.com

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