Bridging over infill destroying prints

This has happened on many prints now, lightning infill, and then the next layer on the top rips the infill and then spews like in the picture
No description
21 Replies
elco
elco17mo ago
Try supporting dense layer And maybe more walls, the bridge doesn't have much support at the ends
MACBEAN
MACBEAN17mo ago
It's 2 walls of 0.6mm And as for supporting dense layer, where do I find that in prusa slicer? Sorry I messed up describing the actual problem pepehands
elco
elco17mo ago
Isn't the infill underextruded anyway? Don't know if supporting dense layer is an option in prusaslicer. It is in susperslicer
MACBEAN
MACBEAN17mo ago
Normally at 80% but I've changed to to 100,it worked once...
elco
elco17mo ago
Are you talking about infill or bridges
MACBEAN
MACBEAN17mo ago
Essentially the first layer that prints across infill
elco
elco17mo ago
Yes that's bridging. I was saying your infill below looks thin
MACBEAN
MACBEAN17mo ago
I'm thinking that I might need to do a flow calibration through prusaslicer, by default the extrusion multiplier for PLA is 0.89, im running again with it set to 1 and i have no real idea how but its printing a bit slower now, i havent changed the speed or acceleration settings though
MACBEAN
MACBEAN17mo ago
The bridging over the infill doesn't even touch the sides before it finally collapses and rips it to bits
No description
blacksmithforlife
do you have it limited to flow amount? now that you are using more flow, if it was close to limits that would then change the speed and thus the time
MACBEAN
MACBEAN17mo ago
max volumetric is set to 25mm^3/s so i guess yeah I've turned max volumetric off
blacksmithforlife
I mean, if that is the max your hotend can handle then don't remove that. It is behaving correctly by limiting the speed
MACBEAN
MACBEAN17mo ago
I haven't tuned the max flow in all fairness, it was just a guess
elco
elco17mo ago
Why so little infill? That's a difficult bridge The bridge isn't overlapping the wall much either, possibly because the walls are so thin, like i pointed out before Unless you have a very good reason for using so little material, why make it so hard?
MACBEAN
MACBEAN17mo ago
So the full model I'm going to be printing is massive, it's only going to be for display purposes and I need to print 3 more of them so would like to accomplish that in about 1kg of filament This is just the tip so I can check the infill, bridging and threads
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