Jump to content
Ultimaker Community of 3D Printing Experts

Circles are not fully round


Recommended Posts

Posted (edited) · Circles are not fully round

Hello all,

I know this seems to be a common fault with Ultimaker Original machines, but I seem to have tried all remedies suggested and it still refuses to work!

I have:

Put Belt tensioners on Long belts

Tightened the short belts by pushing down the motor

Tightened the cross axis rod block (Thinner rods which mount to the print head)

Made sure hot end doesn't wobble/move freely

Checked extrusion rates

Tightened all the pulleys to the rods

Made sure the cross rods are square

The errors seem to be happening at 45* from the X and Y, so it leads me to think it's a belt (slack) issue, but with tightening every single belt, I'm at a loss!

I hope someone might have some suggestions?

Regards,

Alex

File_000.thumb.jpeg.0d0d1de3e7c6bb1daf133d82bbcdeb05.jpeg

Bottom right circle seems to show the defect clearly as it has gaps in the walls at half one and half seven. It should be solid like the other quarters.

File_000.thumb.jpeg.0d0d1de3e7c6bb1daf133d82bbcdeb05.jpeg

Edited by Guest
  • Link to post
    Share on other sites
    Posted · Circles are not fully round

    Hi

    I don`t have a Ultimaker, but had the same exact problem on my own printer.

     

    You have a perpendicular, or parallel, axle (x,y,z) problem, they are not at exact 90 degree, or parallel, from each other.

    Regards

  • Link to post
    Share on other sites
    Posted · Circles are not fully round

    While knowing you said you tensioned the short belts, I am still inclined to think the problem lies with your short belts. Do you have a photo of some reference on how tight they are? Perhaps pushing against it with your finger?

    And can you move your printhead around with just 1 finger pushing against your print head? How freely can it move / how much resistance do you feel?

    Thanks!

  • Link to post
    Share on other sites
    Posted · Circles are not fully round

    Hi SandervG,

    I have tightened the short belts very tightly indeed.

    There is hardly any flex in them at all.

    There seems to be moderate resistance, but this feels like it's coming from the belt tension.

    Could they be too tight?

    I have also double checked my alignment, still all good!

    Regards,

    Alex

  • Link to post
    Share on other sites
    Posted · Circles are not fully round

    Could be a loose pulley on a motor/shaft!

    I put marks on mine with a permanent marker, a stripe that goes from shaft to the pulley. A quick look will show if anything moved.

    // Per.

  • Link to post
    Share on other sites
    Posted · Circles are not fully round

    Hello 

    I have simmelair problems

    Wonderd if and how you solved the problem

    Wr Henl

  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
    ×
    ×
    • Create New...