problem with support under roof

wittiko · 2016-09-11T17:33:29.000Z

Hi all,
I’d like to print a cylinder with two slots on the Replicator 2. I tried to print it with support, but the support structure was only printet on a part of the area where it should be.

I added the .stl-file as well as three pics:

pic no. 1 shows the canceled print

pic no. 2 shows the preview of the replicator software

pic no. 3 shows the desired result.

So, my question is: can the support-structure reach over the whole area under the “roof”?

thanks for reading

wittiko
cylinder with slot.stl (72.2 KB)

IMG_9343_1.JPG851×823 219 KB

IMG_9343_2.JPG851×823 189 KB

IMG_9343_3.JPG559×639 28.9 KB

ALLAXIS · 2016-09-11T21:53:08.000Z

Go to Print Settings

Select The Custom Tab

Select Supports and Bridging

Select Support Bridges.

You should be Good!

Alex Lorenzo - ALLAXIS 3D

SydneyMaker · 2016-09-11T21:54:12.000Z

Makerbot will treat that section as a bridge. Try setting your bridging gap to 0. Otherwise lay your print on its side of your support structure is easy to clean

FTW3D · 2016-09-11T22:21:26.000Z

Can you change the bridge distance to shorter value?

3dptshop · 2016-09-11T22:51:12.000Z

The problem you having is resolved with a simple tweak TURN THE PART UN THE SIDE. This will eliminate the need for support and it increase the strength of your print!

MBot tweak.jpg1920×1021 414 KB

helmar_waiczies · 2016-09-12T03:58:23.000Z

in the profile use

“doSupportUnderBridges”: true,

that should do the trick

MindFuLL · 2016-09-12T20:17:58.000Z

It’s not supporting it because it it’s a bridge. A flat roof like that should print ALMOST perfectly flat without support if you have your temp/speed/cooling dialed in. You can get a similar result by doing what others have suggested(turning on bridge support) but it still will not be perfect unless you are using dissolving support with no gap. If you want that square hole perfect(without sanding) then you should lay it on its side or print in two halves and glue them together.
-Jesse

wittiko · 2016-09-12T23:50:58.000Z

that’s what I was looking for…

thanks!

wittiko · 2016-09-12T23:51:27.000Z

To all who did answer: thank you very much!

Your ideas are very helpfull for me - I appreciate!

Problem solved

wittiko

toybuilder · 2016-09-13T06:10:54.000Z

If your cylinder is small enough, the span is considered to be bridgeable, and that’s why there’s no support underneath. There’s a way to set the distance threshold for this You’ll want to look at https://support.makerbot.com/learn/makerbot-desktop-software/print-settings/custom-profiles-bridging\_12082