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  1. #31
    Administrator bolsoncerrado's Avatar
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    did u try printing just a cube, using minimal speed?

  2. #32
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    When you switched the x and y motors, the problem still existed on the x axis? Then the motors are fine. Maybe a small intermittent break in one of the wires going to the x motor. A few here had problems with the extruder wiring. Inspect the wires and connection very carefully.

  3. #33
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    Quote Originally Posted by bolsoncerrado View Post
    did u try printing just a cube, using minimal speed?
    yes I did, i printed a cube and the pyramid form the sd card. It came OK
    I wonder if it could be a problem link to the acceleration of the step motor.

  4. #34
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    Hi guys,
    here is a quick brief of my problem and what i have tried to do to solve it .
    The problem is that the x axis is not moving smoothly. The head is then not where it should be and it create shift in the prints.
    I made a video where you can ear and see the problem:
    https://drive.google.com/file/d/0Bw7...ew?usp=sharing

    What I have try for now :
    - tight the belt or loose the belt ( no improvement)
    - swapping x and y motor to check that the motor is not broken ( motors are fine )
    - check the wiring and put new wires and connector ( wires are fine )
    - print with repetier host from a Mac instead of PC ( no improvement )
    - print with matter control instead of repetier
    - swap x and y connector on the motherboard ( no improvement )
    - adjust the pots on the motherboard in case of overpower of the motor ( no improvement )
    - print from the sd card to avoid connection problem ( no improvement )
    ...
    If you have any other suggestion you're welcome otherwise i might try to updgrade the firmware...
    Last edited by Fbr; 02-01-2015 at 05:20 PM.

  5. #35
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    I can only think of the obvious possibilities;
    If you are sure that the motor is fine then it really only leaves a slipping belt, in your video you can hear a 'clunk' as if it's slipped???
    1) the belt is faulty/damaged
    2) the belt is loose
    3) the belt drive toothed wheel is slipping on the driveshaft due to;
    3A) Not screwed tight onto flat area of shaft
    3B) Shaft has no flat area or is not long enough (same as some extruder shafts!)
    3C) toothed wheel is damaged

  6. #36
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    Quote Originally Posted by BobenhamHotspur View Post
    I can only think of the obvious possibilities;
    If you are sure that the motor is fine then it really only leaves a slipping belt, in your video you can hear a 'clunk' as if it's slipped???
    1) the belt is faulty/damaged
    2) the belt is loose
    3) the belt drive toothed wheel is slipping on the driveshaft due to;
    3A) Not screwed tight onto flat area of shaft
    3B) Shaft has no flat area or is not long enough (same as some extruder shafts!)
    3C) toothed wheel is damaged
    It's difficult to be 100% sure that the motor is fine but I swapped the x and the y motor. I Think the probability that the 2 motors are bad is pretty low .

    I had the feeling that the problem is linked with an acceleration problem so i turned down the speed to 30mm/s and it 's a bit better if you look at the photo bellow you can see that it have been printing a bit longer but it doesn't solve the problem.
    I'm going to check the shaft and the toothed.
    IMG_1482.JPG

  7. #37
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    Second check on the wires would be a good idea i think. If you have a possibility try using other cables alltogether for a test.

  8. #38
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    So i finally found out what it was !!! I was starting to doubt ...
    So the reason why the x axis was not moving smoothly is because one of the bearing holding the belt was completely blocked.
    It was blocked because a washer is missing in between the bearing and the x-wing frame. ( there is one on the other side ). I took a photo of it :
    IMG_1485.JPG
    i'm going to make a test print before to celebrate ...
    The concept of this machine is good but there is no quality control on the assembly !
    I would advise people on the forum to check that this washer is not missing if they have shifted print.

  9. #39
    3D Printer Legend
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    Fingers crossed

  10. #40
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    Quote Originally Posted by BobenhamHotspur View Post
    Fingers crossed
    So that was it !
    Print came very good ... Just a bloody washer missing !
    image.jpg

 

 

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