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

Printing off of the bed

Recommended Posts

Hello,

I'm wondering if the best way to print flat surfaces off if the bed as the brim material is effecting the quality of the parts.

If I have a wheel for example that has rim detail where it touches the bed, that detail gets lost. If I raise the part up and use supports I have a nightmare if a cleaning job. So I wonder the best way to print these parts.

Cheers.

Share this post


Link to post
Share on other sites

Depending on the model and the PLA you use you could very well get away with printing without a brim and still have only minimal warping (some brands/colours/batches warp less than others) .

If it still warps more than you'd like, adding glue if you haven't already will help keep the part from warping. You might also consider having the bed at a slightly higher temperature than what is generally recommended. Maybe 70C or so. But note that it can affect the quality of the lower layers if there are overhangs.

It's also important that the first layer is nicely smushed into the bed to avoid having any air leaking in underneath.

Not having a lot of infill will reduce the amount of plastic trying to pull the part in on itself as well.

 

Share this post


Link to post
Share on other sites

I disagree with somewhereinla on the brim. If you add the brim yourself in your model it will be printed as one chunk together with the bottom of your model. This will make it harder to remove without doing damage to the model (which you wanted to avoid in the first place). The way the brim is printed by cura makes it really easy to remove in most cases as you can just "peel" it off so to speak.

 

Share this post


Link to post
Share on other sites

OK, so take this model:

Full%20Tyre.png

I'd print that laying on it's side, however because the treads are about 3mm off of the bed and the curve of the lower part is subtle the brim that gets printed to stop it warping ends up being quite invasive - it ruins whichever side is lowest. I have bottom and top (can we split these settings) at 1.2mm which I may cut in half, not sure if that's the cause.

So I decided to split the model, because the geometry is complex this involves creating a hollow part:

Split%20Tyre.png

However when I load this in Cura it adds quite a large chunk to the bottom of the entire tyre section, so the tyre isn't hollow. This isn't brim but some kind of support structure? I'm guessing it's the lower/upper thickness. Of course I want upper thickness but no lower thickness, you can see what it's doing below, the tyre is hollow with no connection at all at the point of splitting, the yellow is all Cura. The red and green I'd be happy with, I don't need that yellow, and I think maybe that is the cause of the problem?

Split%20Tyre%20Cura.png

 

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  

×

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!