Jump to content
Sign in to follow this  
tomato-icn

Holes in the objects

Recommended Posts

Posted · Holes in the objects

You are asking the printer to print in mid air. While that can work on small areas with controlled speed (called bridging), expecting it to work on these models is asking too much for this type of print process.

 

Share this post


Link to post
Share on other sites
Posted · Holes in the objects

You're asking for a top/bottom of 0.0, that's just asking for holes like that.

 

Share this post


Link to post
Share on other sites
Posted · Holes in the objects

thanks a bunch for instant replies guys,

but what would be the solution to your mind, any ideas please?

thanks!

 

Share this post


Link to post
Share on other sites
Posted · Holes in the objects

Also, using 'duplicate outlines' doesn't make sense if you don't have an infill. Instead, just set the layerheight at 0.04 - 0.05 mm.

I don't know why you wan't 0% infill but if it is to spare on filament.. then don't do this. You're trhowing away more plastic then you spare with this method. If you use 10% infill in combination with a top/bottom height of atleast 5x the layerheight, it doesn't cost that much more filament and will give you much better prints without gaps!

 

Share this post


Link to post
Share on other sites
Posted · Holes in the objects

no, it's not about filament at all - the reason is that I want to fill the object with gypsum, to make them weight more. that's the idea.

any solutions, please?

 

Share this post


Link to post
Share on other sites
Posted · Holes in the objects

Set the bottom/top thickness to be non-zero. In the new 13.05 Cura beta, you can turn off top and bottom thickness separately. You're probably also going to need to print with either infill, or some sort of support in the middle to help hold up the top. The slope is so gentle that the loops don't touch one another.

If you really have to have it totally hollow, then the only options are going to be to print slower and cooler, and with even thinner layer height, in order to get as many passes as possible over the troublesome area.

Also I'd turn off duplicate outlines. It isn't helping here - it just prints the exact same thing twice, at half the height. If you're going to take the hit to print twice as many passes, then you *want* them to be different in this case, so that the slopes get smoothed out better. Duplicate outlines is a kludge that causes problems in a lot of cases, and it's only benefit is allowing you to print infill half as often as you print perimeters. Since you aren't printing infill here, it's of no real benefit.

 

Share this post


Link to post
Share on other sites
Posted · Holes in the objects

To get the part hollow *and* to have no holes in the top is going to be very difficult. But of all the suggestions the one closest to what you need is use the new cura beta, set top thickness only.

Also, I agree, never ever use the "skin" feature. Better to slice half as thick layers. This will be the same speed and will make the holes smaller (half the size). They will still be there but smaller. Each time you cut layer height in half the holes will get twice as small but it will take twice as long to print.

But there is some point where you are "printing on thin air" and that just doesn't work well.

 

Share this post


Link to post
Share on other sites
Posted · Holes in the objects

If you use infill 10%, or even 5%, and no bottom layer, you should be able to still pour some gypsum in there for some weight. Or you can drill out some of the infill after the print is done.

 

Share this post


Link to post
Share on other sites
Posted · Holes in the objects

You could also slice with top and bottom fill and remove the first X layers from the GCode.

 

Share this post


Link to post
Share on other sites
Posted · Holes in the objects

You could also slice with top and bottom fill and remove the first X layers from the GCode.

 

But only the infill part... or else add gcode to fake the z-coordinate, otherwise you'll be printing all the upper layers in mid air. :-)

 

Share this post


Link to post
Share on other sites
Posted · Holes in the objects

I have tried to shell the object, creating a second inner hull. This serves to hold the outer layer .

You can then print with low infill.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

  • Our picks

    • Ultimaker Cura 4.0 | Stable available!
      Ultimaker Cura 4.0 is mainly focused on the improved user interface and cloud integration.
      As always, we want to collect your user feedback for this release. If there are any improvements you can think of, feel free to mention it here and help us to shape the next release.
      • 65 replies
×
×
  • Create New...

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!