UltiMaker uses functional, analytical and tracking cookies. Tracking cookies enhance your experience on our website and may also collect your personal data outside of Ultimaker websites. If you agree with the use of tracking cookies, click “I agree, continue browsing”. You can withdraw your consent at any time. If you do not consent with the use of tracking cookies, click “Refuse”. You can find more information about cookies on our Privacy and Cookie Policy page.
The top surface shows 2 issues: underextrusion and play.
Play: This is trivial to fix. Play (aka backlash) can be caused by loose belts or by too much friction. In either case when one of the servos (can't tell if it's X or Y from the picture) moves to a certain position, the head doesn't quite make it all the way there and stops a bit early. Since you have a new UM2 it's probably not friction but you can turn off power and push the head around and make sure both axes are about the same. More likely you have a loose belt. The long belts have spring tighteners so it's probably not those but check those first - squeeze all 4 long belts and make sure they are all equally tight. Most likely the problem is one of the short belts. To tighten, loosen the for screws that hold the motor in place, then push down on the motor hard with one hand (like maybe 2kg force) while tightening the 4 screws (they are in slots so you can slide the motor up and down a bit). Then feel the tightness of the short belts.
Underextrusion: Not enough plastic coming out on that top layer. I don't see underextrusion on your side layers. It could be simply you need one more layer - you want at least 3, maybe 4 layers to get a good seal on the top of your part. The first layer comes out a little low and it takes a few layers until it's all at the right height. So top/botttom thickness should be 4X your layer height. If layer height is .1mm then top/bottom should be at least .4. If .2 then .8. Other fixes for underextrusion are printing hotter or slower (you may be approaching the limit of the volume of filament it can squirt through that tiny nozzle hole). Hotter to make the plastic thinner (less viscous - more like honey than toothpaste) slower to lower the pressures and forces involved.
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!
Cura 5.7 is here and it brings a handy new workflow improvement when using Thingiverse and Cura together, as well as additional capabilities for Method series printers, and a powerful way of sharing print settings using new printer-agnostic project files! Read on to find out about all of these improvements and more.
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.
Recommended Posts
gr5 2,172
The top surface shows 2 issues: underextrusion and play.
Play: This is trivial to fix. Play (aka backlash) can be caused by loose belts or by too much friction. In either case when one of the servos (can't tell if it's X or Y from the picture) moves to a certain position, the head doesn't quite make it all the way there and stops a bit early. Since you have a new UM2 it's probably not friction but you can turn off power and push the head around and make sure both axes are about the same. More likely you have a loose belt. The long belts have spring tighteners so it's probably not those but check those first - squeeze all 4 long belts and make sure they are all equally tight. Most likely the problem is one of the short belts. To tighten, loosen the for screws that hold the motor in place, then push down on the motor hard with one hand (like maybe 2kg force) while tightening the 4 screws (they are in slots so you can slide the motor up and down a bit). Then feel the tightness of the short belts.
Underextrusion: Not enough plastic coming out on that top layer. I don't see underextrusion on your side layers. It could be simply you need one more layer - you want at least 3, maybe 4 layers to get a good seal on the top of your part. The first layer comes out a little low and it takes a few layers until it's all at the right height. So top/botttom thickness should be 4X your layer height. If layer height is .1mm then top/bottom should be at least .4. If .2 then .8. Other fixes for underextrusion are printing hotter or slower (you may be approaching the limit of the volume of filament it can squirt through that tiny nozzle hole). Hotter to make the plastic thinner (less viscous - more like honey than toothpaste) slower to lower the pressures and forces involved.
Link to post
Share on other sites