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Unfortunately lots of things can cause this. First make sure that cura doesn't also show a missing layer - often this kind of thing is caused by a tiny hole in the model (a bad model).
It could be a filament tangle. But the two parts in the top photo seem to have the problem at the same height. Do you agree? If so then it's a "Z" issue:
When the Z axis moves, if it doesn't move far enough, it will overextrude on that layer. If it moves too far then you get a gap.
with power off you could try moving the bed up and down to see if you feel anything. Usually the problem is fixed by cleaning the Z axis screw but it could be many things (stepper driver too hot, screw, nut, vertical rods, vertical bearings).
Putting a 1kg weight such as a brick in the back of the bed once it starts printing can sometimes fix these issues or move them elsewhere.
The helix is triple so if you use a toothpick and clean while spinning the screw you will miss the other 2 helixes.
I recommend spending at least 2 minutes with a toothpick and tissue. You can certainly afford 2 minutes as a test, right? concentrate near the top of the screw where you are having problems (you only seem to be using the top 6cm so why clean the whole thing?). A proper cleaning involves removing the stepper and Z screw - very easy to do - the hardest part is unplugging the cable (assuming um2) (you have to remove a cover - no big deal). Then place on newspaper and spray with WD-40 and clean it completely and let dry and put ONE tiny drop of grease on it after.
While the screw is out test the bed movement and see if there might be a problem with rods and/or bearings.
Edited by Guest
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S-Line Firmware 8.3.0 was released Nov. 20th on the "Latest" firmware branch.
(Sorry, was out of office when this released)
This update is for...
All UltiMaker S series
New features
Temperature status. During print preparation, the temperatures of the print cores and build plate will be shown on the display. This gives a better indication of the progress and remaining wait time. Save log files in paused state. It is now possible to save the printer's log files to USB if the currently active print job is paused. Previously, the Dump logs to USB option was only enabled if the printer was in idle state. Confirm print removal via Digital Factory. If the printer is connected to the Digital Factory, it is now possible to confirm the removal of a previous print job via the Digital Factory interface. This is useful in situations where the build plate is clear, but the operator forgot to select Confirm removal on the printer’s display. Visit this page for more information about this feature.
A year after the merger of Ultimaker and MakerBotQQ, we have unlocked the ability for users of our Method series printers to slice files using UltiMaker Cura. As of this release, users can find profiles for our Method and Method XL printers, as well as material profiles for ABS-R, ABS-CF, and RapidRinse. Meaning it’s now possible to use either Cura or the existing cloud-slicing software CloudPrint when printing with these printers or materials
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gr5 2,094
Unfortunately lots of things can cause this. First make sure that cura doesn't also show a missing layer - often this kind of thing is caused by a tiny hole in the model (a bad model).
It could be a filament tangle. But the two parts in the top photo seem to have the problem at the same height. Do you agree? If so then it's a "Z" issue:
When the Z axis moves, if it doesn't move far enough, it will overextrude on that layer. If it moves too far then you get a gap.
with power off you could try moving the bed up and down to see if you feel anything. Usually the problem is fixed by cleaning the Z axis screw but it could be many things (stepper driver too hot, screw, nut, vertical rods, vertical bearings).
Putting a 1kg weight such as a brick in the back of the bed once it starts printing can sometimes fix these issues or move them elsewhere.
The helix is triple so if you use a toothpick and clean while spinning the screw you will miss the other 2 helixes.
I recommend spending at least 2 minutes with a toothpick and tissue. You can certainly afford 2 minutes as a test, right? concentrate near the top of the screw where you are having problems (you only seem to be using the top 6cm so why clean the whole thing?). A proper cleaning involves removing the stepper and Z screw - very easy to do - the hardest part is unplugging the cable (assuming um2) (you have to remove a cover - no big deal). Then place on newspaper and spray with WD-40 and clean it completely and let dry and put ONE tiny drop of grease on it after.
While the screw is out test the bed movement and see if there might be a problem with rods and/or bearings.
Edited by GuestLink to post
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