Jump to content
Ultimaker Community of 3D Printing Experts
Sign in to follow this  

Help Switching from ABS to PLA

Recommended Posts

Hi all and greets to everyone!

I just moved over to PLA from ABS and not quite sure how to feed it since it oozes out the tip a lot more than the ABS i'm used to.

The procedure I use is:

1) Heat up the machine to around 200+/-

2) Pull out the ABS filament

3) Feed in the PLA

4) Manually turn the feeder wheel until the ABS is gone and the PLA starts coming through

At this point, the PLA comes through the tip and keeps coming for minutes.

How do you know when it's ready to print?

Should I wait for the PLA to stop flowing out before printing? or just cooldown the machine immediately and start a new print from there later?

Thanks in advance for any help/advice!



Share this post

Link to post
Share on other sites

When turning the gear wheel by hand, be sensitive to the amount of pressure that it's taking... slow down a little as the resistance builds, so that you aren't just storing up a lot of pressure in the print head, that will inevitably lead to oozing.

That said, some degree of oozing is pretty normal... just wipe the head off, and start printing. Once the print begins the pressure is going to build back up again anyway, so don't worry about it. It should still turn out ok.


Share this post

Link to post
Share on other sites

Should I wait for the PLA to stop flowing out before printing?

No. If you wait until it stops, then by then there will be lots of air in the head and you will end up with underextrusion on the first layer. So not only do you not need to wait, you might want to "prime" it one more time if you do wait. The default start/end gcode in cura "primes" it a bit before printing. You may have taken that code out long ago for your ABS. Overall I think you will find PLA is easier to print due to it's reduced shrinkage when cooling.


Share this post

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!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

  • Our picks

    • Ultimaker Cura | a new interface
      We're not only trying to always make Ultimaker Cura better with the usual new features and improvements we build, but we're also trying to make it more pleasant to operate. The interface was the focus for the upcoming release, from which we would already like to present you the first glance. 
        • Like
      • 19 replies
    • "Back To The Future" using Generative Design & Investment Casting
      Designing for light-weight parts is becoming more important, and I’m a firm believer in the need to produce lighter weight, less over-engineered parts for the future. This is for sustainability reasons because we need to be using less raw materials and, in things like transportation, it impacts the energy usage of the product during it’s service life.
        • Like
      • 12 replies

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!