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Thread: skewed print

  1. #1

    skewed print

    Hi all,

    I just bought my first diy 3d printer, a 3d stuffmaker mega prusa gen 3. Took me a bit to build it(being a dad and having a full time job) but I finally managed to put it all together. I calibrated it according to the manual that came with the kit. Love the size of things I can print, but my issue is that my first print is skewed toward the positive y axis. IMG_1552.jpg

    this came from a file made by 3d stuffmaker.

    any thoughts? also I'm a total newbie at this so bear with me please if this subject has already been covered somewhere else.

    thanks

  2. #2
    Technologist LuckyImperial's Avatar
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    Some initial questions:

    Do you have any binding or friction on the Y-Axis? Can you confirm that the printer moves along the y-axis freely (in both directions) when not printing anything?

    If a printer can not "retract" to it's original start location because of some bind/friction it will exhibit this behavior.

  3. #3
    Quote Originally Posted by LuckyImperial View Post
    Some initial questions:

    Do you have any binding or friction on the Y-Axis? Can you confirm that the printer moves along the y-axis freely (in both directions) when not printing anything?

    If a printer can not "retract" to it's original start location because of some bind/friction it will exhibit this behavior.
    yes it does move freely, the belt is tight(as much as I could tight it ) and it does not skip a tooth when it moves.

  4. #4
    Technologist LuckyImperial's Avatar
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    The belt is not required to be extremely tight. As a matter of fact, it just needs to be taught. A belt that is too tight will increase the amount of torque required for the motors to move the head.

    Skipping teeth would likely not be an issue (especially if the belt is set to the correct tension). It comes down to the fact that the motors can't spin because they can not output enough torque. A belt that is too tight may exhibit this behavior.

    Is there any information you can reference for the belt tension of your specific printer?

  5. #5
    the belt is not overly tightened, I just made sure that it wouldn't skip while the motor is turning and unfortunately there was no required belt tension provided with the manual.

  6. #6
    Technologist LuckyImperial's Avatar
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    Just to be sure I understand correctly...

    Even though you tightened it "as much as I could tight it", it is not overly tight? Is the tensioner bottomed out?

  7. #7
    yes you understand correctly and there's no tensioner with that printer, just 2 bearings, the motor and the 2 belt attachment points on the base plate.
    Attached Images Attached Images

  8. #8
    Technologist LuckyImperial's Avatar
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    Interesting.

    What speeds are you trying to print at?

  9. #9
    it's set a 300 mm/min right now, could it be too high?

  10. #10
    Technologist LuckyImperial's Avatar
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    Most people communicate using mm/s. 300mm/min converts to 5mm/s and is actually very slow. How long did it take to complete the gear above?

    Typically most printers operate anywhere from 40-60mm/s.

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