I have a question about Simplify3d and bridging :

3D Printing
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1

I have a question about Simplify3d and bridging : I have a part where I have to bridge about 10mm, the hotend builds a bridge on the corner fine, but when it starts to bridge between the existing part and that new thin line, the filament wont stick to that single string and sags. In the preview I can see that those bridging lines only touch that single edge, but will not overlap. Setting the ‘bridge overlap’ only shows on the already printed base. I hope somebody understands what I’m writing, for more explanation see picture : the two green lines on the right edge going straight upwards print fine, but the light blue bridge lines only just touch the lines, there is no overlap. on the left you can see my 0.4mm bridge overlap setting applied. What am I missing? If that cant be set, I have to alter my model…

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2

Are you sure the model is one complete and solid unit. Maybe there’s a separation there and it’s not actually merged. Just a wild guess.

3

Sometimes I think the bridge algorithm has issues with very small bridge anchors. Like maybe it doesn’t think there’s enough material there to attach a bridge. You might try playing with the number of shells or thicker walls in the model to see if that helps.

4

S’funny cos I find Slic3r gives me the same problem but Cura doesn’t and I’m a fan of Slic3r.

5

Firstly I’d run the STL through Netfabb to check it and make sure there are no nasties causing problems. Then, as @Ryan_Carlyle suggests, I’d look at increasing the number of perimeters.

However, it may just be you’ll have to alter the model, in the end it might be the quickest option.

6

It looks like, that there IS NO layer beneath the side of the bridging… What do you expect? Printing a corner midair isn’t going to work without support…

7

Hmmmm, chnaged the model, but the bridging does weird things : see my new post, would be nice if one could add pics to answers :slight_smile:

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@Rene_Jurack ah, maybe you’re right, so the corner on the front right will be drawn to the right and the bridge cant attach to it. But even without a floating corner it does not work, see my other question

9

I don’t understand the model but if that is the interior of the model you can set a solid layer one layer down and that will give it something to build on. If I misunderstood the model, I apologize.

10

Pop loop pop

11

Came across this S3D weakness of bridging thin wall once. A workaround is to slice the bridging layer as separate process, with 1 shell, and solid bottom layer.