Peeling base?

[Davebug 0]

Hello!

 

I am a primary school teacher using an ultimaker 2+. I have had this problem with a few student projects, seems to be projects with a large base area.

 

Just wondering if anyone can identify what the problem is and any tips to fix it!

 

Thanks!

Dave

[DidierKlein 729]

Hi,

 

It looks like a Raft, you can (and should) disable it in the adhesion section on Cura

[Framar 38]

DAvebug, what material is this ?

[Davebug 0]

5 hours ago, Framar said:

DAvebug, what material is this ?

 

Framer it is the ultimaker PLA.

 

7 hours ago, DidierKlein said:

Hi,

 

It looks like a Raft, you can (and should) disable it in the adhesion section on Cura

 

The raft seemed to print perfectly but then when it started completing the actual print it did this.

[geert_2 558]

If the bottom is flat, then as Didier Klein said, I would also print this on the bare glass. Without raft. This gives you a smoother bottom-surface too.

 

For better bonding to the glass, I use my "salt method" (see this page, and then scroll down a bit):

https://www.uantwerpen.be/nl/personeel/geert-keteleer/manuals/

 

Other people use dilluted wood glue, hair spray, glue stick, glue stick + wiping with water, 3DLAC, etc. So, plenty of bonding methods that should not cause this sort of issues. I would suggest you try them and find one that suits your models, and that you like.