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Have you replaced the bowden tube recently? You can experience wear and tear with it over time, or have debris like ground up filament work it's way into it, causing the filament not to move smoothly.
The first place to look at if all the hardware is good would be your settings in Cura to determine your volumetric extrusion rate. You calculate this by using your nozzle width X layer height X print speed to get your extrusion rate in mm^3/second.
8mm^3/s running PLA at 230 C is considered a pretty healthy extrusion rate for this test. You can download the gcode here, which will automatically set the temperature 230 for this print: https://www.youmagine.com/designs/test-print-for-ultimaker--2
This should give a baseline for how much under extrusion you're seeing, or whether the issue may be related to the gcode.
If you're towards the end of a filament reel and it's very tightly wound, you might also start to see some under extrusion because the printer is having to work harder to unwind it and get it through the bowden tube.
You mentioned replacing parts of the hot end--is your fan shroud touching the nozzle? If it is, it will act as a heat sink, and can cause under extrusion.
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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.
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fbrc8-erin 272
Hi, Patrick,
Have you replaced the bowden tube recently? You can experience wear and tear with it over time, or have debris like ground up filament work it's way into it, causing the filament not to move smoothly.
The first place to look at if all the hardware is good would be your settings in Cura to determine your volumetric extrusion rate. You calculate this by using your nozzle width X layer height X print speed to get your extrusion rate in mm^3/second.
8mm^3/s running PLA at 230 C is considered a pretty healthy extrusion rate for this test. You can download the gcode here, which will automatically set the temperature 230 for this print: https://www.youmagine.com/designs/test-print-for-ultimaker--2
This should give a baseline for how much under extrusion you're seeing, or whether the issue may be related to the gcode.
If you're towards the end of a filament reel and it's very tightly wound, you might also start to see some under extrusion because the printer is having to work harder to unwind it and get it through the bowden tube.
You mentioned replacing parts of the hot end--is your fan shroud touching the nozzle? If it is, it will act as a heat sink, and can cause under extrusion.
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