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.
Ironing Temps - PLA Crystallization In The Nozzle???
Posted
· Ironing Temps - PLA Crystallization In The Nozzle???
17 hours ago, inventabuild said:
If the Ironing feature in Cura is used to iron a large surface for a long period of time while the nozzle is held at printing temps, for example 1/2 hour or longer at 220C, is there a risk that the PLA will start to crystallize in the nozzle and affect its future performance?
I think you might have some terms mixed up. PLA crystalizes as it cools down. As long as it's hot, no crystaline structures will form. What can happen is that PLA that remains above a certain temp too long stards to degrade (and form a black nasty layer). I've not really seen this happen and if it does, it's really easy to remove when the nozzle is hot.
17 hours ago, inventabuild said:
Is the default ironing extrusion multiplier of 10% meant to help prevent PLA from crystallizing in the nozzle or to help smooth out the surface or both?
Mostly to fill it up. Keeping up the flow (especially on larger areas) also ensure that the pla inside the nozzle doesn't stay there too long. This could cause clogs (which doesn't damage the nozzle, but it does mess up your print)
17 hours ago, inventabuild said:
Would it be better to retract the filament out of the hot end while ironing to minimize the possibility of the PLA crystallizing in the hot end?
Not really. You also want that tiny bit of extra material when ironing.
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
nallath 1,120
I think you might have some terms mixed up. PLA crystalizes as it cools down. As long as it's hot, no crystaline structures will form. What can happen is that PLA that remains above a certain temp too long stards to degrade (and form a black nasty layer). I've not really seen this happen and if it does, it's really easy to remove when the nozzle is hot.
Mostly to fill it up. Keeping up the flow (especially on larger areas) also ensure that the pla inside the nozzle doesn't stay there too long. This could cause clogs (which doesn't damage the nozzle, but it does mess up your print)
Not really. You also want that tiny bit of extra material when ironing.
Link to post
Share on other sites