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First, I would make sure the filament is grinding or not. Then I would pull a 'clean set' of filament so that you no longer have any grind divots in the filament. Basically that means that you should pull the bowden tube out of the print head, release pressure off the feeder and pull it through until it is a clean area. Yes, you will lose the length of the bowden tube of filament, but I have found every now and then, the grindings create a weak spot that can bend and catch in the head block area.
Keep in mind that I am not sure if it is the head block as I have the UM3 and only used to the print cores. But it is in that same area that it can create an issue.
If you are doing cold pulls and it is snapping, I would think that you are letting it get too cool. Maybe the steel print core dissipates the heat quicker?
And, possibly, you need to increase the tension in the feeder, or increase the temp of the filament or maybe the flow pressure.
Try one thing at a time though so you know what changes will make a difference.
Just a lot of guesses I would start with in no particular order.
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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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kmanstudios 1,120
First, I would make sure the filament is grinding or not. Then I would pull a 'clean set' of filament so that you no longer have any grind divots in the filament. Basically that means that you should pull the bowden tube out of the print head, release pressure off the feeder and pull it through until it is a clean area. Yes, you will lose the length of the bowden tube of filament, but I have found every now and then, the grindings create a weak spot that can bend and catch in the head block area.
Keep in mind that I am not sure if it is the head block as I have the UM3 and only used to the print cores. But it is in that same area that it can create an issue.
If you are doing cold pulls and it is snapping, I would think that you are letting it get too cool. Maybe the steel print core dissipates the heat quicker?
And, possibly, you need to increase the tension in the feeder, or increase the temp of the filament or maybe the flow pressure.
Try one thing at a time though so you know what changes will make a difference.
Just a lot of guesses I would start with in no particular order.
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