straight lines are (no longer) straight
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this is most likely a mechanical issue.
what kind of printer is it?
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@Veti it's a self made printer (blv mgn). what do you suggest to check/fix?
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check belt tension
and recheck that each corner is still 90 degrees
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thanks for your answer.
we checked and did not find any issue.
the strange thing is that that 2 lines (left and bottom) are fairly straight while the other 2 lines (right and top) are crooked. because it's a core xy printer this makes us think that the issue might be related to the direction of rotation of the steppers.
have you got any further hints?
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we can see the head moving in x and y direction where it should not move in these directions.
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remove the belt and see if everything moves without resistance.
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Does the machine have steel core belts?
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@mrehorstdmd no, it's got fiberglass belts as.
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@Veti when i last had removed the belts everything moved without resistance but i'll check when a find enough time and energy after my bread and butte job.
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I just took apart my first blv printer because I was noticing the same thing and it turned out it was no longer square. I would check the frame by measuring on diagonals....front right to left rear and front left to right rear. See if they are identical. If not then it's time for a tear-down.
