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Seams in prints (by movement)


PaulienC

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Posted · Seams in prints (by movement)

Hi,

 

I have this problem for a while now and I can't fixed. Sometimes there is one seam, sometimes a lot, sometimes I have a perfect print.

It's like the print moves and there's a seam. I tried using a brim, I always use 3d lac, I set up the building plate everytime, ...

 

Anyone who knows how I fix this or what the problem is? Or is there a part that needs to be replaced?

 

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Thank you for your help.

 

Paulien

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    Posted · Seams in prints (by movement)

    So it looks like you have a layer shift.  This is a common complaint/problem.  Which axis is shifting? Usually only the X or only the Y axis does this.  There are 3 possible causes:

     

    1) 90% of the time it's a set screw in a pulley that needs tightening.  These need to be so amazingly tight that the tool. twists - sometimes permanently.  Usually it's the one on the stepper as that one has the most torque and unfortunately is the hardest to get to but if you have a long hex driver you can push the print head around and get to it without taking those quarter panels off - they come off with just 2 screws to get at the stepper.  The second most common pulley is the other one on the short belt.

     

    2) 9% of the time you just need to oil things.  If this has been printing continuously for 6 months or 8 hours a day for a year then it's time to oil the axes.  Push the head around to feel the resistance of both axes.  Add only one drop to each of the 4 thick rods in the gantry and one drop to each of the two rods that go through the print head.  Push the head around again to spread the oil.  If no significant decrease in resistance/friction then it's probably issue #1.

     

    3) 1% of the time - forget about this - it's one of the other 2.  Well let's just say this could be the issue if your room temperature is over 30C/90F.

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