All,
Ive been printing for a while now (PLA+ mostly), but switching to PETG because the things Im printing shrink a lot inside the car on a hot day. Ive found that when printing PETG (Sunlu), using the default parameters still are a bit sloppy. Ive been starting the print and then hitting the Silent button on the touchscreen and that will slow it down a bit, but what I want is to know what setting(s) within Studio has the direct correlation to speed. Is it the Volumetric Speed or it really setting the Outer Wall, Inner Wall, Sparse Infill, Internal, etcā¦
Yep, thatās the speedās
This only affects speed once the value set here is exceeded. Itāll reduce the speed to achieve this volumetric flow.
You may want to search the forum for PETG printing tips. Default settings are not always so helpful. In my case, I did slow down to 25% of recommended speeds and replaced part cooling by aux cooling (X1C). That may however not always be neccessary.
So to reduce the speed by 50% I would halve the values of the following:
Initial Layer Speed
Initial Layer
Initial Layer Infill
Other Layer Speeds
Outer Wall
Inner Wall
Sparse Infill
Internal Solid Infill
Top Surface
Overhang Speed
Bridge
Gap Fill
Example if my Outer Wall needs to slow down, and its set to the default PETG speed of 200mm/s, then taking it to 100mm/s should reduce the speed by 50% when printing the outer wall, correct?
Yep. Thatāll do it.
But look a bit further in the forum. There are many things to take care about when printing PETG as it is not forgiving. Youāll find that you also need to avoid crossing line patterns (i.e. use monotonic or concentric surfaces, gyroid or honeycomb infill) to avoid nozzle build up, that Bambuās generic PETG settings are better than their specific Bambu PETG settings, overhang issues, etc.
[SOLVED] Bad quality when printing PETG - Bambu Lab X1 Series - Bambu Lab Community Forum is just one of many.
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I never mess with speedsā¦a waste of time. Set volumetric flow for all filaments. Petg 7.5, tpu 1.0, pla 15, pa 7.5
Setting volumetric flow lower will limit the maximum speed, but if you need certain things, like overhangs to be even slower, it will need to be set there, unless youāre willing to slow the whole print down to that speed.
THIS! Why isnāt this standard in the slicers, AND at least why no Pop-Up notification?! Iām currently printing with PETG at 0.08 layer height with a 0.4 nozzle, and while I understand itās pushing it, the walls look Amazing, but my infill is all over my printer like Iām making popcorn with no lid on. Thank you, this should be closer to the top result when searching for ā[printer model] infill sucksā or āinfill breaks downā.
I was thinking it could be something like this, but by god I could not figure it out. Thank you for pointing out something that should be obvious, but is easily forgotten.
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Besides the infill type, thereās also the buggy ācombine infillā failure case that can cause really messy infill. Not sure atm if it is fixed in the current Studio 2.2 Beta. Earlier versions led to over-extruded infill (in particular with adaptive layers).
Orca does it better by enabling an upper bound.
Damnā¦ The one Iām having the most problems with is under extruded infill. slowing down the print to āsilentā "fixed it after a few layers, but that means that infill was not extruded correctly, or the speed was too much for the Generic PETG profile.
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Some PETG wants to print really slow (I.e. Bambu Translucent PETG). It seems that speeds for PETG can vary a lot from type to type.
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I have found PETG to reward going slow. But there are big differences between types and brands.
BBL PETG Basic for example gets a speed limit of 80mm/s from me.
But infill only problems are rare. Usually, overhangs and sharp corners are where I am seeing problems first.
Are you using combine infill? Or do you have vastly different speed settings between outer/inner wall speeds and infill? If the former, definitely disable that. If the latter, curb infill speed to the fastest wall lines (if they print OK).
BW, 
& 
,
Eno
Yeah, I can see that. Iāve mainly only printed in 0.20 and 0.28 with PETG, and at that size you can let the printer even do Ludacris modeš But slower was a benefit on my old Prusa, so Iām familiar with itš
Yeah, infill only problems has been rare, only really when doing a lot that PETG doesnāt like. Itās been printing at double the speed it has extruding. I sadly also used cubic infill which was dumb from my side.
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