28 minutes ago, gr5 said:If you look at this area in cura layer view you can learn a lot. Cura slices your part and each layer has "islands". That hole adds an extra island. Above and below the hole it's probably printing say left to right but just left of the hole it's reversing directions (or the other way around but either way it is probably going the other direction to the left of the hole - you can check in layer view and use the horizontal scroll to see for sure).
So that bulge to the left of the hole is probably related to changing directions and that implies to me you have a loose belt in the Y direction (assuming Y direction is through that hole). How you could possibly get a loose belt on a UM3 is a mystery to me because normally all the belts have hidden tensioners inside the blocks. But I'd check the Y belts. If you put the head in a corner (important) and pluck them and check the pitch with a guitar tuner they should be 80Hz to 130Hz.
Anyway - check it out in layer view and see if I was right about the reverse direction. Maybe I'm wrong and that's unrelated.
Oh - high friction can also cause this. Put one drop (no more) of light oil (any light mineral oil such as 3 in 1 or sewing machine oil but not WD40 which is not an oil) on all 6 rods up in the gantry and push the head around to spread this.
1
Thank you very much for your quick reply. I've applied some oil (the unilube oil that was included with the UM3). The weird thing is, that I don't have any loose belts. I've tightened the short belts and checked the long belts.
I'm trying another print now and see how it goes.
-
1
Recommended Posts
gr5 2,224
If you look at this area in cura layer view you can learn a lot. Cura slices your part and each layer has "islands". That hole adds an extra island. Above and below the hole it's probably printing say left to right but just left of the hole it's reversing directions (or the other way around but either way it is probably going the other direction to the left of the hole - you can check in layer view and use the horizontal scroll to see for sure).
So that bulge to the left of the hole is probably related to changing directions and that implies to me you have a loose belt in the Y direction (assuming Y direction is through that hole). How you could possibly get a loose belt on a UM3 is a mystery to me because normally all the belts have hidden tensioners inside the blocks. But I'd check the Y belts. If you put the head in a corner (important) and pluck them and check the pitch with a guitar tuner they should be 80Hz to 130Hz.
Anyway - check it out in layer view and see if I was right about the reverse direction. Maybe I'm wrong and that's unrelated.
Oh - high friction can also cause this. Put one drop (no more) of light oil (any light mineral oil such as 3 in 1 or sewing machine oil but not WD40 which is not an oil) on all 6 rods up in the gantry and push the head around to spread this.
Link to post
Share on other sites