Jump to content
Ultimaker Community of 3D Printing Experts
BogdanG312

Ultimaker's pva problem

Recommended Posts

Hello, I bought my UM3 around a year ago. For the last 2-3 months a am facing the same problem over and over again.

20181110_141410.thumb.jpg.217a0b7011abd963a97d8c9e3f4ea27f.jpgAt the beginning everything was perfect. But as  i said around 2-3 months ago the PVA(I use the ultimaker's one in BB core and PLA in core AA). It's like the PVA isn't sticking to the PLA.

Is there any fix or?

 

Best regards,

Bogdan

 

Share this post


Link to post
Share on other sites

Could be that your PVA is not dry enough. PVA is very hygroscopic and needs a dry storage, always!

There were a lot of similar issues the last days/weeks, search the forum for specific actions, like how to dry your PVA.

 

If humidity is high in your area, also think about a dry box or something like that, because a dry PVA could get too wet during a long print quickly.

Share this post


Link to post
Share on other sites

In my area (the Netherlands) it's enough to keep the filament in a container, without extra active drying. I've used PVA of over a year old (Ultimaker and other brand) without any issue. Prevention works. In other climates you may need active drying, not sure, but anyhow prevention pays of. 

 

My simple DIY box, I also print from the box...

https://www.youmagine.com/designs/drybox-for-pva-ultimaker3

Share this post


Link to post
Share on other sites

FWIW I no longer use any support strategy where PVA rests atop PLA.  Everything has to touch the build plate or I use a different support material.  Just too many problems.  In my case, I put the PVA in a dryer before and after every use, never hear sizzling or popping so I am pretty sure it's all dry.  I think it's just a finicky material and the BB core takes careful management to avoid clogs. 

 

I'm sure others have a better technique.  Perhaps breakaway would be a better option, but I haven't picked any up yet.

John

Share this post


Link to post
Share on other sites
1 hour ago, BogdanG312 said:

But i am really surprised because i opened this PVA around 10hours ago.(It was brand new).

 Was just an idea, maybe it is ok and you just have the problem that PVA will really not stick to PLA.

 

53 minutes ago, JohnInOttawa said:

Perhaps breakaway would be a better option, but I haven't picked any up yet.

 

Breakaway is ok, comes out nice and not much post cleanup needed, but for most support prints I use PLA if there are not specific requirements or needs.

Share this post


Link to post
Share on other sites

I used Ultimaker Nylon with PVA, think Nylon is one of the best materials to use with PVA, it sticks much better to it than PLA.

 

And no, did not try to use PLA as support, think you should give PVA another try....

  • Like 2

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

  • Our picks

    • Introducing Ultimaker Cura 3.6 | Beta
      Ultimaker Cura 3.6 | Beta is available. It comes with new features, bug fixes, and UX improvements. We would really like to have your feedback on it to make our stable release as good as it can be. As always, you can download the beta for free from our website, for Windows, MacOS, and Linux.
        • Like
      • 92 replies
    • Print Core CC | Red for Ruby
      Q: For some users, abrasive materials may be a new subject matter. Can you explain what it is that makes a material abrasive when you are not sure which print core to use?
      A: Materials which are hard in a solid piece (like metals, ceramics and carbon fibers) will generally also wear down the nozzle. In general one should assume...
        • Like
      • 30 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!