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
21 Replies
Try supporting dense layer
And maybe more walls, the bridge doesn't have much support at the ends
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 
Isn't the infill underextruded anyway? Don't know if supporting dense layer is an option in prusaslicer. It is in susperslicer
Normally at 80% but I've changed to to 100,it worked once...
Are you talking about infill or bridges
Essentially the first layer that prints across infill
Yes that's bridging. I was saying your infill below looks thin
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
The bridging over the infill doesn't even touch the sides before it finally collapses and rips it to bits
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
max volumetric is set to 25mm^3/s
so i guess yeah
I've turned max volumetric off
I mean, if that is the max your hotend can handle then don't remove that. It is behaving correctly by limiting the speed
I haven't tuned the max flow in all fairness, it was just a guess
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?
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
Spool for scale
The CR-6max that the first was printed on is currently decommissioned
In slicing with a 50% infill (lightning) and 3 perimeters, it still tries to print into thin air and only has 2 insertion points from the edge
ive had some measure of success, upping the temperature, lowering the cooling and 3 perimeters, 25% infill on the lightning
this might be down to the hardened steel nozzle
That's a high flow for hardened steel. The thermal conductivity of hardened steel is not great.
so i gave up with the 0.6 until the zinc coated copper arrives, lo and behold the 0.4 works so much better